Radiology Flashcards
What does radiology play a role in?
Radiology plays an invaluable role in the initial
diagnosis and subsequent management of patients
List the type of imaging techniques and add a few examples.
Basic film interpretation * X-Ray Specialized radiological investigation * Ultrasound * CT Scans * MRI Scans
What is X-radiation composed of? X-radiation is a form of..
X-radiation (composed of X-rays) is a form
of electromagnetic radiation
Who discovered X-rays in 1895 and when did this person receive the first Nobel prize?
Röntgen discovered X-rays 1895
and received the first Nobel Prize 1901.
Wavelength range of X-rays :
10 - 0.01 nm
Why are X-rays used?
X-rays are used to take images of the inside of an object in diagnostic radiography and crystallography E.g. Arthritis, pneumonia, bone tumors and fractures
What can hard X-rays do?
Hard X-rays can penetrate solid objects
What does the equipment typically used for bone x-rays consist of?
Equipment typically used for bone x-rays
consists of an x-ray tube suspended over a
table on which the patient lies.
What the drawer under the table hold?
A drawer under the table holds the x-ray film or
image recording plate
Where is a high contrast image formed?
High contrast image is formed on silver-impregnated fil
What do dense bone and soft tissue do?
Dense bone absorbs much of the radiation
while soft tissue, such as muscle, fat and
organs, allow more of the x-rays to pass
through them.
As a result, bones appear white on the x-ray,
soft tissue shows up in shades of gray and air
appears black.
What is fluoroscopy?
Fluoroscopy is an imaging technique that uses
x-rays to obtain real-time moving
images of the internal structure
and function of a patient
What is fluoroscopy augmented with?
Fluoroscopy is augmented with a radiocontrast agent
Barium Sulphate Radio-Iodine
How are radio-contrast agents administered?
Radio-contrast agents administered
by swallowing or injecting into the
body of the patient
What is fluoroscopy used for?
Fluoroscopy is used to describe the anatomy and
functioning of the blood vessels, the
genitourinary system, or the
gastrointestinal tract (GI tract)
What is interventional radiology?
Interventional radiology is a subspecialty
Interventional radiology is a…
minimally invasive technique
What is interventional radiology used for?
Interventional radiology is used for : *Diagnostic (e.g. angiogram) *Treatment (e.g. angioplasty) Such as: peripheral vascular disease, renal artery stenosis, inferior vena cava filter placement, gastrostomy tube placements, stents and hepatic interventions
What is an angiogram?
An angiogram is a special form of x-ray that permits the diagnosis of
blockages (occlusions) or narrowings (stenosis) in the arteries of the
body
What happens during the angiogram test?
During the angiogram test, a tube (catheter) is inserted into an artery at the groin
What is injected down the tube and when are x-ray pictures taken?
A special radio-opaque dye (contrast medium) is injected down the
tube and x-ray pictures are taken as the solution passes along the
blood vessels.
What is an angioplasty?
An angioplasty is a procedure where a balloon is passed into your
artery on the end of a tube (catheter) and is inflated (blown up) to treat
a narrowed or blocked artery
What does an angioplasty prevent?
This technique means that surgery may be avoided in many cases
What is a venogram?
A venogram is an x-ray test that takes pictures of blood flow
through the veins in a certain area of the body
