This document contains 43 figures summarizing key concepts in ultrasound imaging. It discusses different transducer types like linear arrays and convex arrays and how they are used to generate ultrasound beams and images. It also covers Doppler ultrasound principles like laminar flow profiles, spectral analysis of velocity, and factors that can cause errors in velocity measurements. Common artifacts are demonstrated including mirroring, shadowing and reverberation.
Ultrasound elastography is a relatively advanced technique used to know the stiffness of the tissue. It is a non-invasive technique. Broadly classified into Quasistatic and Dynamic elastography.
Ultrasound elastography is a relatively advanced technique used to know the stiffness of the tissue. It is a non-invasive technique. Broadly classified into Quasistatic and Dynamic elastography.
An overview of Doppler Effect in Ultrasonography - the medical imaging of the body using Ultrasound.
Includes Colour Doppler, Power Doppler, Spectral Doppler, Continuous Wave Doppler, Pulsed Wave Doppler, and comparisons with other Radiographic imaging modalities.
Physicians have used palpation to detect differences in tissue stiffness as an aid to diagnosis based on the fact that the mechanical properties of tissues are often dramatically affected by the presence of disease processes such as cancer, inflammation, and fibrosis. Elastography depends on the same differences in mechanical properties between healthy and abnormal tissues using imaging to detect these differences at depths not reachable by manual palpation and presents data in color-coded display, can be performed with ultrasound, using manual pressure or low frequency sonic waves, or by MR Elastography imaging.
MRI artifacts remains a big challenge to get a diagnostic image. This represents a practical comprehensive approach to understand MRI artifacts & how to get rid of.
Training Material inherited form Philips Basics of Ultrasonography. Covers the fundamentals of Ultrasound Waveform, Piezoelectric Effect, Phased Echo Concept, Goal of Ultrasound, Ultrasound Image Construction process, Types of Resolution, Probe Internals, The Doppler Effect, Spectrum Waveform and concept, Color Doppler, Components of Ultrasound.
Magnetic Resonance Elastography is an advanced imaging technique in MRI. This method is a method of "virtual palpation" of internal organs with the help of MRI.
SWI , high susceptibility for blood products, iron depositions, and calcifications
makes susceptibility-weighted imaging an important additional sequence for the diagnostic
workup of pediatric brain pathologic abnormalities. Compared with conventional MRI
sequences, susceptibility-weighted imaging may show lesions in better detail or with higher
sensitivity
DON'T MISS THIS DEAL!!!
Get the Ultrasonic Testing level 1 training for only $5 and save 83%. use this link to get the discount
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The course provides you with Level 1 training in the fundamentals of Ultrasonic Testing methods. It will introduce you to the basic concepts and principles and includes hands-on training using Ultrasonic Testing
equipment settings and functions.The Ultrasonic theories presented will provide the knowledge of Ultrasonic Testing required and enable you to work with individuals qualified and certified to gain needed experience for qualification as Level 1. While the practicle manipulations will give you the essential steps that you will need to calibrate the ultrasonic testing equipment, perform the inspection, collect and interpret the data.This course consists of two handbooks: The first handbook made by the instructor is the official of the training. It covers all the topics presented through the 39 lectures. While the second one (offered as bonus) is the official one of the TWI (International Institute of Welding) training.In addition to that, the course includes 39 lectures alternating between the different lecture types, with regular quizzes and exams to enable you to check that your are following the topics covered.
An overview of Doppler Effect in Ultrasonography - the medical imaging of the body using Ultrasound.
Includes Colour Doppler, Power Doppler, Spectral Doppler, Continuous Wave Doppler, Pulsed Wave Doppler, and comparisons with other Radiographic imaging modalities.
Physicians have used palpation to detect differences in tissue stiffness as an aid to diagnosis based on the fact that the mechanical properties of tissues are often dramatically affected by the presence of disease processes such as cancer, inflammation, and fibrosis. Elastography depends on the same differences in mechanical properties between healthy and abnormal tissues using imaging to detect these differences at depths not reachable by manual palpation and presents data in color-coded display, can be performed with ultrasound, using manual pressure or low frequency sonic waves, or by MR Elastography imaging.
MRI artifacts remains a big challenge to get a diagnostic image. This represents a practical comprehensive approach to understand MRI artifacts & how to get rid of.
Training Material inherited form Philips Basics of Ultrasonography. Covers the fundamentals of Ultrasound Waveform, Piezoelectric Effect, Phased Echo Concept, Goal of Ultrasound, Ultrasound Image Construction process, Types of Resolution, Probe Internals, The Doppler Effect, Spectrum Waveform and concept, Color Doppler, Components of Ultrasound.
Magnetic Resonance Elastography is an advanced imaging technique in MRI. This method is a method of "virtual palpation" of internal organs with the help of MRI.
SWI , high susceptibility for blood products, iron depositions, and calcifications
makes susceptibility-weighted imaging an important additional sequence for the diagnostic
workup of pediatric brain pathologic abnormalities. Compared with conventional MRI
sequences, susceptibility-weighted imaging may show lesions in better detail or with higher
sensitivity
DON'T MISS THIS DEAL!!!
Get the Ultrasonic Testing level 1 training for only $5 and save 83%. use this link to get the discount
https://www.udemy.com/ultrasonic-testing/?couponCode=PROEmailPromo
The course provides you with Level 1 training in the fundamentals of Ultrasonic Testing methods. It will introduce you to the basic concepts and principles and includes hands-on training using Ultrasonic Testing
equipment settings and functions.The Ultrasonic theories presented will provide the knowledge of Ultrasonic Testing required and enable you to work with individuals qualified and certified to gain needed experience for qualification as Level 1. While the practicle manipulations will give you the essential steps that you will need to calibrate the ultrasonic testing equipment, perform the inspection, collect and interpret the data.This course consists of two handbooks: The first handbook made by the instructor is the official of the training. It covers all the topics presented through the 39 lectures. While the second one (offered as bonus) is the official one of the TWI (International Institute of Welding) training.In addition to that, the course includes 39 lectures alternating between the different lecture types, with regular quizzes and exams to enable you to check that your are following the topics covered.
This presentation is from 13th chapter of Grainger and Allison--Diagnostic Radiology A TEXTBOOK OF MEDICAL IMAGING.
My aim behind all these presentation is to provide authentic images. As our all radiology revolve around images of diseases. We can put these ppts in our androids for study and references.
This Presentation is basically image collection from chapter 9 of GRAINGER & ALLISON’S DIAGNOSTIC RADIOLOGY.
This is an effort to present the most authentic images.
The Chest Wall, Pleura,Diaphragm and Intervention 10 Dr. Muhammad Bin ZulfiqarDr. Muhammad Bin Zulfiqar
This Presentation is basically image collection from chapter 10 of GRAINGER & ALLISON’S DIAGNOSTIC RADIOLOGY.
This is an effort to present the most authentic images.
Characterization of Quasi-Keplerian, Differentially Rotating, Free-Boundary L...Sérgio Sacani
We present results from pulsed-power driven differentially rotating plasma experiments designed to
simulate physics relevant to astrophysical disks and jets. In these experiments, angular momentum is injected
by the ram pressure of the ablation flows from a wire array Z pinch. In contrast to previous liquid metal and
plasma experiments, rotation is not driven by boundary forces. Axial pressure gradients launch a rotating
plasma jet upward, which is confined by a combination of ram, thermal, and magnetic pressure of a
surrounding plasma halo. The jet has subsonic rotation, with a maximum rotation velocity 23 3 km=s. The
rotational velocity profile is quasi-Keplerian with a positive Rayleigh discriminant κ2 ∝ r−2.80.8 rad2=s2.
The plasma completes 0.5–2 full rotations in the experimental time frame (∼150 ns).
Imaging for Thoracic Surgeons | IACTS SCORE 2020IACTSWeb
This presentation illustrates the imaging and the modalities involved in a prudent diagnosis in thoracic surgery. It is meant to serve as an introductory guide for beginners to understand the need for imaging referrals, considerations, pre-operative decision making in imaging and post-surgical follow up.
Courtesy of Dr. Srikrishna S.V, MS, MCh, FRCS(Ed.), FIACS. He presently serves as Professor and Senior Consultant of Thoracic Surgery at Narayana Institute of Cardiac Sciences, Bommasandra, Bengaluru.
This presentation is part of a video that belongs to the lecture series of IACTS SCORE 2020 held at the Sri Sathya Sai Institute of Higher Medical Sciences Whitefield, Bengaluru between 7th and 8th March, 2020.
Dislocation of joint is very tricky. In this presentation radiological evaluation of Dislocation of various joints will be discussed.
This is one of the best pictoral review of important joint dislocations
Renal Color Doppler Ultrasound.
After studying this presentation one will be able to perform and interpret ultrasound.
This presntation in my opinion is best short analog to text.
In this presentation we will discuss the bone age assessment mainly focusing wrist radiograph.
we shall also highlights some points in adult bone age
Basically it is an introduction. We shall not discuss its judicial importance
Role of medical imaging in developemental dysplasia of Hip Dr muhammad Bin Zu...Dr. Muhammad Bin Zulfiqar
In this presentation we will discuss the role of medical imaging---plain Radiography, Ultrasound,Arthrography, CT and MRI in the evaluation of Developemental dysplasia of hip. Our main focuss will be on Sonographic evaluation.
In this presentation we will discuss the basic of axial trauma from head to pelvis. We will discuss the important key points that aids in the diagnosis of axial trauma
This is a chapter from Grainger and Allison. I have Coolected all images from chapter 21 with caption in this presentation.
In my opinion it will be very benificial to have this in your android.
This presentation is the first series of the MR imaging of Knee.
In this presentation MRI anatomy has been discussed. As we all know good knowledge of medical imaging three dimensional anatomy is key for good reporting.
Hope we all get benifitted.
Suggestions are most welcome
This is a chapter from Grainger and Allison. I have Coolected all images from chapter 20 with caption in this presentation.
In my opinion it will be very benificial to have this in your android. ,
This presentation is almost a complete Pictoral view of Radiograph chest.
This presentation will help radiologist in daily reporting.
This presentation will help physicians, surgeons, anesthetist and almost all medical professionals in diagnosing commonly presenting cardiac diseases.
This will also help all in preparaing TOACS examination.
This is a chapter from Grainger and Allison. I have Coolected all images from chapter 19 with caption in this presentation.
In my opinion it will be very benificial to have this in your android. ,
In this presentation we will dscuss the imp imaging features of Posterior fossa tumors in pediatric age group.
Medulloblastoma
Pilocytic Astrocytoma
Ependymoma
Brainstem Glioma
Schwanoma
Meningioma
Epidermoid Cyst
Arachnoid Cyst
In this presentation we will discuss about the
Anatomy of Prostate
Technique of Transrectal US
Carcinoma Prostate and
Different modes of prostatic biopsy.
In this presentation we shall discuss all fractures with specific names .
This is a pictoral review.
This presentation will be very helpful for radiologist to have in their androids to help them in rapid reporting
In this presentation all images of Chapter 18 from Grainger and Allison have been discussed.
Our aim is to discuss authentic material .
This is only for educational purposes.
In this chapter air space infilteration have been discussed. Ground glass haze and consolidation are discussed in detail.
This presentation is a selection of images from 17th chapter of grainger and allison.
Our aim is to provide standard and proved cases of the disease process.
This all is for educational purpose
Objectives of this presentation are
Introduction to ct
Cross sectional anatomy
Common important pathologies
This presentation is aimed to educate beginers to help in ct interpretetion.
16 High Resolution Computed Tomography of Interstitial and Occupational Lung ...Dr. Muhammad Bin Zulfiqar
This presentation is collection of images from chapter 16 of Grainger and Allison.
Inthis we will discuss the ILD.
This is only for educational purposes.
This Presentation is a collection of chapter 5 images from Grainger and Allison.
Our aim is to study authentic data.
This is only for educational purposes
In this presentation we will discuss role of high resolution in characterizing normal variant and pathologies of spinal pathologies.
This is a pictoral review.
This presentation provides sufficient material for anyone who wants is interested in interventional radiology. Here we will discuss the available facilities, mechanisms and equipments.
In my opinion this presentation will prove a footstep in interventional radiology
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
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These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
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Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
These lecture slides, by Dr Sidra Arshad, offer a quick overview of physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar leads (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
The prostate is an exocrine gland of the male mammalian reproductive system
It is a walnut-sized gland that forms part of the male reproductive system and is located in front of the rectum and just below the urinary bladder
Function is to store and secrete a clear, slightly alkaline fluid that constitutes 10-30% of the volume of the seminal fluid that along with the spermatozoa, constitutes semen
A healthy human prostate measures (4cm-vertical, by 3cm-horizontal, 2cm ant-post ).
It surrounds the urethra just below the urinary bladder. It has anterior, median, posterior and two lateral lobes
It’s work is regulated by androgens which are responsible for male sex characteristics
Generalised disease of the prostate due to hormonal derangement which leads to non malignant enlargement of the gland (increase in the number of epithelial cells and stromal tissue)to cause compression of the urethra leading to symptoms (LUTS
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
2. • FIGURE 3-1 ■ Harmonic
imaging. (A)
Conventional grey-
scale imaging through
the liver at the porta
hepatis. (B) In harmonic
mode (note the diff
logo on the left) the
image has much higher
contrast and the portal
vein is more clearly
delineated. PV = portal
vein.
3. • FIGURE 3-2 ■ The A-scan. The A-scan is a trace
indicating echo intensity of tissue with depth. In this
example, there is a fluid space from 6 to 10 cm, from
which no echoes arise. Tissues superficial and deep to
this produce echoes of varying intensities and there is a
particularly strong echo from the skin (0–5 cm). The
time gain compensation (TGC) curve is also shown.
4. • FIGURE 3-3 ■ M-mode trace. The echo intensity is displayed as
brightness and the trace is swept across the screen so that the x-
axis represents time. This is an M-mode echocardiogram showing
the rapid movement of the valve apparatus with thicker proximal
and distal moving bands representing the ventricular walls. There is
a small pericardial effusion separating the epicardium of the right
ventricle from the chest wall.
5. • FIGURE 3-4 ■ Mechanical transducer. (A) Diagram of a
mechanical endoprobe transducer. A motor rotates the
transducer assembly to sweep out a circular path. (B) An
intravascular image of a coronary artery showing the
endothelium as a bright inner layer interrupted by an
atheromatous plaque (arrowhead). T = transducer. (Figure
B courtesy of Professor Ton van der Steen, Erasmus Medical
College, Rotterdam, the Netherlands.)
6. • FIGURE 3-5 ■ Phased array. (A) Diagram illustrating steering an
ultrasound beam with a phased array transducer. The delay lines
introduce small timing differences in the pulses driving the
elements so that those at one end are fired earlier than those
further along the array. This has the effect of steering the beam
away from the centre line, rather as if the transducer face had been
tilted. (B) Right lobe of liver taken with a phased array showing the
advantage of the small footprint in accessing the portions that lie
high under the diaphragm, especially segment 8. 7 and 8 =
segments 7 and 8, D = diaphragm.
7. • FIGURE 3-5 ■ Phased array. (A) Diagram illustrating steering an
ultrasound beam with a phased array transducer. The delay lines
introduce small timing differences in the pulses driving the
elements so that those at one end are fired earlier than those
further along the array. This has the effect of steering the beam
away from the centre line, rather as if the transducer face had been
tilted. (B) Right lobe of liver taken with a phased array showing the
advantage of the small footprint in accessing the portions that lie
high under the diaphragm, especially segment 8. 7 and 8 =
segments 7 and 8, D = diaphragm.
8. • FIGURE 3-6 ■ Linear array. Diagram of a linear array
showing the formation of one ultrasound beam by
triggering a set of elements at one end of the probe. The
next beam would be formed by the adjacent or partially
overlapping set of elements so that the beam is swept
along the transducer face to give a rectangular image.
9. • FIGURE 3-7 ■ Breast carcinoma. A
heterogeneous mass (arrowheads) with irregular
margins and distal shadowing are characteristics
of a breast cancer. This image was taken with an
18-MHz linear array probe. The rectangular
format is particularly suitable for superficial
structures.
10. • FIGURE 3-8 ■ Convex array.
(A) Sagittal image of a
normal upper abdomen
taken with a 6-MHz curved
array. (B) Transvaginal
image of a uterus with a
fibroid (arrowheads) taken
with a tightly curved 9-MHz
array. The convex format is
a compromise between the
footprint requirements of
sector and linear probes
and has the advantage of
giving a wide field of view
for deeper structures. E =
endometrium, GB =
gallbladder, IVC = inferior
vena cava, L = liver, PV =
portal vein.
11. • FIGURE 3-9 ■ Ultrasound beam shapes. The shapes of the ultrasound
beam from four transducers are indicated. All are of the same frequency
(3.5 MHz). The beam from the 10-mm probe in (A) has a complex region
close to the transducer face, then a mid-portion with near parallel sides,
before the beam spreads out in the far field. The white lines indicate the
half-power limits. Increasing the probe diameter (B) improves the overall
beam width. In (C), weak focusing has been added by concave shaping of
the crystal. This further improves the beam shape in the focal zone but
causes it to spread more severely further out. This
would be a useful compromise for general abdominal imaging Stronger
focusing (D) exaggerates these effects, producing a fine beam but only
over a short distance. This would be useful for imaging superficial
structures.
12. • FIGURE 3-10 ■ Electronic
focusing. Diagram to
illustrate the principle of
electronic focusing. The
delay lines are set to send
the pulses from the outer
elements fractionally ahead
of those from more central
elements. The resulting
interference patterns
accentuate the central part
of the beam and cancel the
off-axis portions. The effect
is greatest at the focal zone.
13. • FIGURE 3-11 ■ Ultrasound beam plot. The complexity and marked
deviation from the ideal of a practical diagnostic ultrasound beam
is shown in this intensity plot. The beam is very complex for the first
few millimetres from the transducer face (on the left of the figure)
but improves towards the focal zone where it reaches an effective
diameter of a few millimetres before spreading out again in the far
field. Unfortunately, some ultrasound energy is also sent out as side
lobes at angles to the main beam, further complicating the effective
beam shape. These divergences from the ideal narrow shape limit
both the spatial and contrast resolution of ultrasound images.
(Beam plot kindly supplied by Dr Adam Shaw of the National
Physical Laboratory, Teddington.)
14. • FIGURE 3-12 ■ Beam width artefact. In this
ultrasound examination of the bladder, the
intense echoes from gas in a loop of bowel
(arrow) have spread across into the urine
(arrowhead). This artefact results from the
finite width of the ultrasound beam.
15. • FIGURE 3-13 ■ Velocity artefact from a silicone prosthesis.
This unfortunate young man developed a second teratoma
having had an orchiectomy on the right with insertion of a
prosthesis. The depth of the prosthesis is depicted as being
greater than that of the tumour-bearing testis, in conflict
with the clinical impression, which was the reverse; this
geometric distortion is the result of the lower speed of
sound in the prosthetic material that delays the echoes so
that they are plotted as lying deeper than they really are. P
= prosthesis, T = teratoma.
16. • FIGURE 3-14 ■ Beam dispersion by fat. Deep
to this fatty renalhilum, the retroperitoneal
tissue layers (arrowheads) are less clear than
adjacent tissue planes because the hilar fat
has defocused the beam. S = renal sinus.
17. • FIGURE 3-15 ■
Reverberation artefacts. (A)
Multiple internal reflections
within tissue layers give rise
to false repeated signals,
which are most obvious
where they fall over echo-
free fluid spaces such as the
gallbladder (arrowhead). (B)
Whereas the intima–media
layer is well delineated at
the deeper surface of this
normal common carotid
artery (arrow), the
superficial laye is partly
obscured by reverberation
artefact (arrowheads). C =
common carotid artery.
18. • FIGURE 3-16 ■ Mirror image artefact. One of the
structures in the liver such as this cyst is mirrored
at the air–pleura surface and appears in the
position of the lower lobe of the lung, producing
the ‘percentage sign’ artefact (arrowhead). When
this surface is absent, for example when a pleural
effusion is present, the effect does not occur. C =
cyst.
19. • FIGURE 3-17 ■ Acoustic shadowing. The dark
band (arrowheads) deep to the gallstones
(arrow) is an example of shadowing produced
by a combination of high absorption and
reflection. GB = gallbladder, K = kidney.
20. • FIGURE 3-18 ■ Increased sound transmission.
The echoes (arrowheads) deep to this liver cyst
(arrow) appear brighter than those from the rest
of the liver; this is because the cyst fluid
attenuates less than the solid liver and so signals
from beyond it are relatively overamplified.
21. • FIGURE 3-19 ■ Congested liver. In heart failure,
the liver may become congested with extra fluid.
The separation of the reflectors reduces the liver
echoes so that it becomes less echogenic than
the kidney. In addition, the vascular markings are
accentuated because they are not affected. GB =
gallbladder, K = kidney.
22. • FIGURE 3-20 ■ Fatty liver. The multiple
interfaces between fatladen liver lobules and the
surrounding watery tissues give these fatty liver
high-intensity echoes which can be seen as
increased contrast with the adjacent renal cortex
(compare Fig 3-19). K = kidney, L = liver.
23. • FIGURE 3-21 ■ Laminar flow. Diagrammatic
representation of the concentric layers of
blood flowing at different velocities, with the
highest velocity in the centre of the vessel.
24. • FIGURE 3-22 ■ Parabolic velocity profile. The
fastest flow is in the centre of the vessel, with
a progressive reduction in velocity towards the
vessel wall.
25. • FIGURE 3-23 ■ Plug flow. The flow velocities
are almost equal across the whole vessel
diameter.
26. • FIGURE 3-24 ■ Normal common femoral
artery flow. There is triphasic flow with early
diastolic flow reversal.
27. • FIGURE 3-25 ■ Low-resistance flow. The flow is
continuously forward throughout the cardiac
cycle, with moderately high flow throughout
diastole. There is very little low-velocity flow
throughout most of the cardiac cycle (compare
with Figs 3-26 and 3-27).
28. • FIGURE 3-26 ■ Moderate spectral
broadening. The spectrum throughout late
systole and most of diastole has been filled in
by an increased range of blood flow velocities.
29. • FIGURE 3-27 ■ Complete spectral broadening.
There is now complete filling of the spectrum
throughout the cardiac cycle, with brief
periods of simultaneous reverse flow during
systole.
30. • FIGURE 3-28 ■ Turbulence beyond a stenosis.
There is highvelocity flow beyond this carotid
artery stenosis, with simultaneous forward and
reverse velocities. The internal : common carotid
peak systolic velocity ratio is 2.14, indicating a
haemodynamically significant stenosis.
31. • FIGURE 3-29 ■ Close-up view of the spectral trace. The
spectral trace is composed of increments on both the
vertical and horizontal axes. The horizontal increments
indicate the individual time intervals during which Doppler
sampling occurs, 20 ms in this example. The vertical
increments indicate increasing frequency. The brightness of
the trace within each pixel indicates the number of blood
cells moving with that velocity at that time.
32. • FIGURE 3-30 ■ Dependence of RI on heart
rate. The value of enddiastole is relatively
high if the heart rate is rapid (1). A slower
heart rate allows a greater time for diastolic
deceleration, leading to a lower end-diastolic
velocity (2) and a higher resistance index. V =
velocity, T = time.
33. • FIGURE 3-31 ■ (A) Spectral
distribution in plug flow. A
very narrow band of
velocities is present
throughout the cardiac
cycle in this artery. (B)
Spectral distribution in
parabolic flow. The slower
flow in this wide portal
vein gives rise to a wide
range of velocities during
each time interval.
34. • FIGURE 3-32 ■ Colour Doppler. Fetal circle of Willis. The
flow in the right middle cerebral artery, the left anterior
communicating artery, the left posterior communicating
artery and the right posterior cerebral artery is displayed in
red as the flow is towards the transducer. The flow in the
other vessels is passing away from the transducer and is
therefore represented by blue.
35. • FIGURE 3-33 ■ Power Doppler display of a right
kidney. This extended field of view shows the
flow in the inferior vena cava, main renal vessels
and the intrarenal vessels right out to the
capsule. The loss of directional information
prevents the differentiation of arteries from
veins.
36. • FIGURE 3-34 ■ Vessel wall definition. Normal
carotid artery. The power Doppler display colour
intensity decreases near the vessel wall owing to
the volume elements lying partly outside the
vessel. This gives an apparent improvement in
the definition of the intimal surface.
37. • FIGURE 3-35 ■ (A) Colour
Doppler with 90° beam-
to-vessel angle. There is
poor flow detection and
direction ambiguity
throughout the vessel. (B)
Power Doppler display
with 90° beam-tovessel
angle. As direction
information is not used in
the display, uniform flow
detection is achieved
throughout the vessel
segment.
38. • FIGURE 3-36 ■ Calculation of time-averaged
mean velocity. The weighted mean velocity
during each time interval has been calculated.
The average of these throughout the trace is a
close estimate of the true mean velocity.
39. • FIGURE 3-37 ■ Superior
mesenteric arterial trace.
(A) Normal: the vessel
has remained within the
range gate throughout
the cardiac cycle, giving a
satisfactory Doppler
trace. (B) Artefactually
abnormal SMA trace: the
gate is too small and is
misplaced so that the
vessel moves out of the
range gate during
diastole, giving rise to the
false appearance of
increased vascular
resistance.
40. • FIGURE 3-38 ■ Dependence of velocity error on
beam-to-vessel angle. The error in velocity
calculation is less than 10% for angles of less
than 50°. There is a rapid and unacceptable rise in
the error rate for angles greater than 70°.
41. • FIGURE 3-39 ■ Mean peak velocity
calculation. Automatic software has
calculated the peak instantaneous velocity for
each time interval throughout the cardiac
cycle. The mean of these values is the mean
peak velocity.
42. • FIGURE 3-40 ■ Aliasing.
(A) The frequencies
above the Nyquist limit
have appeared on the
wrong side of the
baseline. (Note that no
beam-to-vessel angle has
been set so the velocity
values are uncorrected
and therefore
meaningless.) (B) The
aliased peaks have been
electronically transposed
to their correct locations.
43. • FIGURE 3-41 ■ Inappropriately high wall
filter. The wall filter has been set at 200 Hz
and has removed all the low-velocity
information in this venous study.
44. • FIGURE 3-42 ■ Artefactual flow reversal on colour flow
imaging. Flow within the splenic vein (arrowheads) is from
left to right. In this transverse epigastric image, on the left
side of the image the flow is towards the curvilinear array
probe and is therefore displayed as red. On the right side,
the flow is away from the probe and is therefore displayed
as blue. There is a thin black area at the point where the
colour changes, indicating a true flow direction reversal,
rather than aliasing, as the cause of the colour change. A =
aorta, I = inferior vena cava.
45. • FIGURE 3-43 ■ True and artefactual colour flow reversal. The high-
velocity jet through this portal vein stenosis has given rise to
aliasing. The aliased green signal passes through yellow to red in a
continuous gradation (in the vertical limb of the vessel in this
display). The coarse vortex within the poststenotic dilatation gives
rise to a true area of flow reversal, colour-coded blue, which is
separated from the forward flow red component by a black margin.
46. • FIGURE 3-44 ■ Contrast-enhanced ultrasound (CEUS) of a
haemangioma. The baseline transverse section through the right
lobe of the liver (A) shows a subtle lesion (arrowheads). The system
was then reset to display the contrast image on the left (using
contrast pulse sequences) and the B-mode image on the right, both
with low mechanical indices. SonoVue (2.4 mL) was given IV and the
haemodynamics of the flow through the lesion observed in real
time. At 11 s after injection (B), the lesion showed peripheral
nodular enhancement (arrowhead). By 22 s (C), the lesion shows
centripetal filling and by 41 s (D) it had almost completely filled, a
pattern characteristic of a haemangioma. The liver and the kidney
also show enhancement. The ability to provide a firm diagnosis of a
benign mass as soon as it was detected is a benefit of CEUS. K =
kidney.
47. • FIGURE 3-44 ■ Contrast-enhanced ultrasound (CEUS) of a
haemangioma. The baseline transverse section through the right
lobe of the liver (A) shows a subtle lesion (arrowheads). The system
was then reset to display the contrast image on the left (using
contrast pulse sequences) and the B-mode image on the right, both
with low mechanical indices. SonoVue (2.4 mL) was given IV and the
haemodynamics of the flow through the lesion observed in real
time. At 11 s after injection (B), the lesion showed peripheral
nodular enhancement (arrowhead). By 22 s (C), the lesion shows
centripetal filling and by 41 s (D) it had almost completely filled, a
pattern characteristic of a haemangioma. The liver and the kidney
also show enhancement. The ability to provide a firm diagnosis of a
benign mass as soon as it was detected is a benefit of CEUS. K =
kidney.
48. • FIGURE 3-45 ■ Elastography. The echogenic
lesion in the left pane has the appearances of a
haemangioma (arrowhead). In the elastogram in
the right pane, it is seen as a blue region against
the liver’s mainly green coloration; this indicates
that the lesion is stiffer than the liver.