Imaging Flashcards
Particles of ionizing energy directed through the body towards a sensitive film
X-rays
Ability of rays to pass through body parts is dependent upon the _____ and composition of the tissues in the region
Density
The areas where the xray beams are absorbed and not transferring through the film will turn out ____ in the image, and that is known as ______
White; radiopaque
The more radiopaque an image is, the (higher/lower) the radio density is of the structure that the xray could not get through.
Higher
The colour that will appear on the xray if the x-rays pass through tissues in the body
Black
The opposite of radiopaque is ____
Radiolucent
Organize these four levels of tissue density from radiolucent to radiopaque:
Fat, water, bone, & air
Air, fat, water, bone
When two or more images are placed over each other in the frame
Superimposition
Why is superimposition a problem in radiography?
We lose differentiation between the two bones
Anterior to posterior view and posterior to anterior view are ____ plane views
Frontal
Lateral views are ___ plane views
Sagittal
The structures that are closest to the film plate are the (most/less) clearly imaged on the film and the structures that are further away from the film will appear (more/less) clear.
Most; less
Xrays are used to look for
Fractures
Quality of bone mineralization
Alignment of joints
DJD (Degenerative joint disease)
What are the ABCs of evaluation?
A - Alignment
B - Bone density
C - Cartilage space
S - Soft tissues
When looking at Alignment, what do you look for?
Size
Number
Shape and contour
Position
When looking at Cartilage space what do you look for?
Width
Symmetry
When looking at Soft tissue what do you look for?
Gross musculature
Joint capsule
Perisosteum
Xray’s are not good to look at for organs because they have (similar/different) densities which makes it difficult to distinguish one organ from the other.
Similar
Which imaging technique uses
X-rays and computer
Tissues displayed in shades of gray based on the attenuation of the rays?
CT Scan
The 360 degree view makes the CT Scan a much more sensitive view to the soft tissue contrasts than the typical xray. Therefore it is (good/bad) for looking at soft tissue pathology
Good
Use of a large magnet, radio frequencies, and a computer to produce images
MRI
Does the MRI use Xrays?
No
(T1/T2) Image has a short repetition time and a short echo time and is used to view normal anatomy
(T1/T2) image has a long repetition time and echo time and is used to assess the presence of pathology like inflammation
T1
T2
(Radiolucent/radiopaque) refers to structures that are less dense and permit the X-ray beam to pass through them
Radiolucent
(Radiopaque/Radiolucent) refers to structures that are dense and resist the passage of X-rays.
Radiopaque
