GXMO Anatomy and Radiographic Procedures Flashcards

The ASIS (anterior superior iliac spine) is a common palpation landmark. It is located at the level of which lumbar vertebra?

Answer: L4-L5 disc space

The ASIS corresponds approximately to the L4-L5 intervertebral disc level, making it a useful landmark for abdominal and lumbar spine positioning.

For an AP shoulder projection, which rotation demonstrates the glenohumeral joint space most clearly?

Answer: 15–20 degrees external rotation of the arm

External rotation of the arm 15–20 degrees places the greater tubercle in profile and opens the glenohumeral joint space for best visualization.

The trachea bifurcates into the right and left mainstem bronchi at a structure called the:

Answer: Carina

The carina is the ridge at the bifurcation of the trachea into the right and left mainstem bronchi, located at approximately the T4-T5 level.

In a lateral elbow projection, correct positioning is confirmed when which structures are superimposed?

Answer: Medial and lateral epicondyles

In a true lateral elbow, the medial and lateral epicondyles should be directly superimposed, confirming no rotation.

The Waters projection is most commonly used to evaluate which anatomical structures?

Answer: Maxillary sinuses and orbital floors

The Waters (parietoacanthial) projection provides the best view of the maxillary sinuses and orbital floor, useful for detecting blow-out fractures.

Which projection of the knee best demonstrates the intercondylar fossa (notch)?

Answer: Tunnel (Camp-Coventry) projection

The tunnel (Camp-Coventry) projection, with the knee flexed and the tube angled caudad, opens the intercondylar fossa to show loose bodies or osteochondral defects.