The document discusses X-ray grids, which are devices used in X-ray machines to filter out scattered radiation and improve image quality. It describes how X-ray grids work by absorbing randomly scattered photons that would otherwise reduce contrast and clarity in X-ray images. The document provides details on the history of X-ray grids, their construction, types including parallel, focused and criss-cross grids, as well as factors like grid ratio and Bucky factor.
The importance of identification of radiographic images
The types/ range of information required to identify a radiograph
Methods of recording the identification information on the film
The importance of identification of radiographic images
The types/ range of information required to identify a radiograph
Methods of recording the identification information on the film
An X-ray film automatic processor is a device designed to move medical X-ray films from one solution to the next, in the film development process, without the need for human intervention except to insert a film or cassette
Xeroradiography is the production of visible image utilizing the charged surface of a photoconductor (amorphous selenium) as the detecting medium, partially dissipating the charge by exposure to X rays to form a latent image and making the latent image visible by xerographic processing.
An X-ray film automatic processor is a device designed to move medical X-ray films from one solution to the next, in the film development process, without the need for human intervention except to insert a film or cassette
Xeroradiography is the production of visible image utilizing the charged surface of a photoconductor (amorphous selenium) as the detecting medium, partially dissipating the charge by exposure to X rays to form a latent image and making the latent image visible by xerographic processing.
These lectures has prepared for postgraduate student (Ophthalmology) according to the curriculum of Bangladesh College of Physician and Surgeons (BCPS) and Bangabondhu Sheikh Mujib Medical University (BSMMU) Bangladesh
This lecture is based on post-graduate students of Ophthalmology (DO, DCO, MCPS, FCPS, MS) and optical principle of LASER, construction of laser and laser tissue interaction has cover the lecture
Atomic structure refers to the organization and composition of atoms, which are the fundamental building blocks of matter. Atoms are incredibly small and consist of several subatomic particles, primarily protons, neutrons, and electrons. Understanding atomic structure is essential in the field of chemistry and forms the basis for our understanding of the physical and chemical properties of elements and compounds.
MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
Atrioventricular conduction blocks ( AV blocks ) are classified into 3 types.
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ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
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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.
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Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
The prostate is an exocrine gland of the male mammalian reproductive system
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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
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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
micro teaching on communication m.sc nursing.pdfAnurag Sharma
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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.
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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
2. GRIDS
An X-ray grid is the part of an X-ray machine
that filters out randomly deflected radiation
that can obscure or blur an image produced
by the machine.
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3. CONTINUE
Whenever X-rays pass through matter, some of the x-ray
photons will interact with the atoms of the matter. When
taking an X-ray, may incoming X-ray photons are absorbed
by the bone, a high attenuation material, while other
tissues absorb less. This produces an image of dark and
light on the X-ray film.
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4. CONTINUE
This effect is like holding up paper to a light to see the writing on
the other side. However, absorption is not the end. As part of the
absorption, a second photon with less energy will be produced,
flying off in a different direction than the photon that was
absorbed. These “scattered” photons will create a random
grayness on the image, reducing the contrast between body
tissues, and making it difficult to read the image clearly.
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5. CONTINUE
The are five ways X-rays interact with matter. These
include photo electronic (FE), Compton Scattering (C),
Pair Production, Tomson Scattering (R), and
Photodisintegration (PD). In low energy x-rays below
100keV, only photo electronic absorption and Compton
scattering are significant.
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7. INVENTION
Dr. Gustav Bucky invented the X-ray grid in 1913. He
described it as a honey-combed lead grid. His design
was imperfect, with lead strips thick enough to appear
as lines on the X-ray image. He attempted to remove
these lines by moving the grid during X-ray exposure.
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8. PURPOSE
An X-ray grid is a filtering device that ensures the
clarity of the image on X-ray film. When an X-ray
machine sends radiation through an object,
specifically a body, the object absorbs or deflects
most of the rays.
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9. CONTINUE
Only about 1 percent of the X-rays pass through the
body on a straight line and burn an image onto the
film. The deflected X-rays can hit the film at random
angles, obscuring the image. The grid filters out
these random X-rays.
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12. GRID SHOULD BE USED FOR
Anatomical body part >10cm
With high kvp expect during mammography
Soft tissue structures to increase contrast
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13. LOCATION
In between patient and cassette (IR)
Or
The placed over the Bucky below patient table
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15. GRID RATIO
The grid ratio is a measure of the height of the
lead strip to the interspace distance, and is a
good measure of the selectivity of primary to
scatter transmission.
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17. TYPES OF GRIDS
X-ray grids are divided into four kinds based on their designs.
Parallel Type Grids
Focused Type Grids
Criss-Cross Type Grids
Tapered Type Grids
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18. PARALLEL TYPE GRIDS
A grid where the absorbing strips are parallel to
each other in their longitudinal axis. Most linear
grids are also focused (i.e. the strips are slightly
tilted, converging at a line in space (the convergent
line).
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19. CONTINUE
A non-focused linear grid has strips that are parallel when
viewed in cross-section; this is called a parallel grid. Many
X-ray tables are equipped with linear, focused grids, and
the strips in these grids are parallel with the long axis of
the table, allowing the X-ray tube to be tilted in this
direction without changing the effectiveness of the grid.
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20. FOCUSED TYPE GRIDS
A grid in which the absorbing strips are slightly angled
towards the focal spot. The grid can therefore be used only at
a specified focal distance (actually inside a narrow distance
interval around the specific distance). Otherwise, the grid will
absorb the primary radiation and parts of the film are barely
exposed. Focused grids may be linear or crossed.
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21. CRISS-CROSS TYPE GRIDS
A grid consisting of two superimposed parallel grids
having the same focusing distance. Such grids are
very efficient in removing scattered radiation but must
be arranged at exactly right angle to the beam. The use
of such grids is therefore limited.
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22. TAPERED TYPE GRIDS
A grid that the surface is tapered into the center of
grid, functioning similar to a focused grid. All of the
strips are parallel to each other, and the tapered
surface is toward the focal spot.
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23. BUCKY FACTOR
The Bucky factor is the ratio of x-rays arriving at the grid
(incident radiation), and those being transmitted through
the grid. The Bucky factor describes how much the output
of the x-ray tube must be increased in order to
compensate for the removal of incident radiation by a grid.
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24. GRID CUT OFF
Loss of primary radiation that occurs when the
image of the lead strips are projected wider
than they would be with ordinary
magnification
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