Interpretation Principles Flashcards
1
Q
What are the 5 opacities?
A
Air Fat Water Bone Metal
2
Q
What material is the most radiolucent?
A
Air
3
Q
What material is the most radiopaque?
A
Metal
4
Q
Superimposition
A
A structure appears in an unexpected location and is misinterpreted as a lesion
5
Q
Summation sign
A
A special case of superimposition where overlapping structures create a summation opacity that is not really present in the patient
6
Q
Silhouette sign
A
the effacement (loss of visualization) of the border of two structures of the same radiographic opacity that are in contact
7
Q
How do you name radiographs?
A
Point of Entrance
Point of Exit
Use correct anatomic terminology
8
Q
How do you orient images?
A
Cranial or proximal to top
Patient left on viewer right
9
Q
Left-Right Lateral
A
“Right” Lateral
10
Q
Right-Left Lateral
A
“Left Lateral”
