This document compares MRI and CT scanning modalities. It discusses the basic anatomy of image planes for both modalities. CT uses X-rays to acquire fast, accurate images suited for bone, lungs, vessels and calcifications, while MRI uses magnetic fields and radio waves to acquire soft tissue images in any plane, but requires longer scan times and is more sensitive to motion. Both modalities have limitations for certain applications and imaging certain anatomies.
Computed tomography (CT scan) is a medical imaging procedure that uses computer-processed X-rays to produce tomographic images or 'slices' of specific areas of the body. These cross-sectional images are used for diagnostic and therapeutic purposes in various medical disciplines.
This powerpoint presentation was prepared for physics seminar class that I am enrolled in as a graduate student at Creighton University. I reviewed a paper published in Scientific Instrument journal. The paper focused on active cancellation of stray magnetic field.
Brain CT Anatomy and Basic Interpretation Part IISakher Alkhaderi
Detailed anatomy of the brain ventricles , CSF production and pathway and arterial supply and venous drainage of the brain and corresponding CT cross sectional anatomy and definition of sulcus and gyrus and fissure and the names of the important gyri .
Basic physics of multidetector computed tomography ( CT Scan) - how ct scan works, different generations of ct, how image is generated and displayed and image artifacts related to CT Scan.
Brain CT Anatomy and Basic Interpretation Part ISakher Alkhaderi
Detailed anatomy and Radiological guidelines for radiologist and general physicians to facilitate use of BRAIN CT SCAN in medical diagnosis and emergencies supported by images and scientific data.
Magnetic resonance imaging (MRI) is an imaging technique used primarily in medical settings to produce high quality images of the soft tissues of the human body.
This presentation discusees a brief history of the MRI, it's mechanism of action, applications in dentistry and recent advancements in its technology. Also it's advantages and disadvantages in comparison with the CT scan
basic and brief but informative knowledge about what basically MRI is ...
easy to understand as well as presenting during lectures and in classes . share it
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
15min teaching demo for consideration as an adjunct professor at a local University
1. MRI vs CT
The Differences of these modalities
and which one is best suited
2. Basic Anatomy of viewing
plane
• The Image Planes
• Axial (Cross-section)
• Slice of bread
• either direction
• Sagital (Midline)
• Left <-> Right
• Coronal (Horizontal)
• Front <-> Back
3. Computerized Axial
Tomography
• The Mechanics
• Tomography - one direction
of motion, various focal
planes.
• Axial Tomo - One dynamic
motion coupled with
movement of subject.
4. Computerized Axial
Tomography
• Cross-sectional imaging using X-Rays
• Acquires images extremely fast (mSec)
• Accuracy to 1mm (thin slices)
• SNR - low
• Motion sensitivity - low
• Fast Image reconstructions
5. Computerized Axial
Tomography
• Great for imaging:
• Bone
• Lung
• Calcifications
• Heart
• Vessels (Arterial & Venous)
• Soft Tissue (with vessels)
• 3D reconstructions
6. Computerized Axial
Tomography
• Limitations and Risks:
• Not good for Pregnancy, Kids, Sensitive Tissue
(Post RTX)
• Contrast needed for imaging vessels, but low
probability to cause Nephrological Toxicity
• Weight limit of 400-450 lbs
8. Helmholtz Coil
Hermann von Helmholtz (1821-1894)
German scientist and philosopher who made fundamental
contributions to physiology, optics, electrodynamics,
mathematics, and meteorology.
Helmholtz Coils
A pair of conducting circular coils each having N turns,
each carrying a current I, separated by a distance
equivalent to the radius of the circular loops, produce a
homogeneous magnetic field B in the mid-plane between
the two circular coils.
a = radius of the coils
a = separation between the coils
a/2 = distance to the mid-plane
B = magnetic field at the mid-plane
10. Magnetic Resonance
Imaging
• Uses Magnetic Fields and RadioFrequency devices for
acquiring images
• Imaging in any plane (X,Y,Z)
• Image time varies significantly (30sec - 45min)
• Very sensitive to Motion
• Accuracy within 1.5mm (but with many compromises and
only on specific Sequences)
• Image reconstruction more time consuming
11. Magnetic Resonance
Imaging
• Great for Imaging:
• Soft Tissue (more information than CT)
• Ligaments, Tendons, Spinal Cord
• Bone Tumors & minute abnormalities
• Vessels
12. Magnetic Resonance
Imaging
• Limitations and Risks:
• Not good for Pacemaker, Aneurysm clips, Metal implants,
Cochlear implants, etc.
• High Anxiety component
• Very sensitive to motion (time variant)
• Weight limit 300-350 lbs
• Not good for Lung or Heart Imaging
• Contrast not always needed, but higher Nephrological Toxicity