GXMO GXMO Anatomy and Radiographic Procedures

Question 1

Which anatomical structure is located at the level of the sternal angle (angle of Louis) and is used as a landmark for chest X-rays?

Accepted Answer

T4-T5 intervertebral disc

Answer

The sternal angle (angle of Louis) corresponds to the level of the T4-T5 intervertebral disc and marks the carina of the trachea.

Question 2

For a PA chest X-ray, the patient's hands should be placed:

Accepted Answer

On the hips with elbows rotated forward

Answer

Placing hands on the hips with elbows rotated forward moves the scapulae laterally, preventing them from overlying the lung fields.

Question 3

Which projection is best for demonstrating fluid levels in the sinuses?

Accepted Answer

Erect PA or Waters projection

Answer

Erect positioning (PA or Waters) allows fluid to pool at the bottom of sinuses, creating visible air-fluid levels on the radiograph.

Question 4

The recommended SID (source-to-image distance) for a routine PA chest X-ray is:

Accepted Answer

72 inches (183 cm)

Answer

A 72-inch SID is used for PA chest X-rays to minimize magnification of the heart and reduce patient dose.

Question 5

Which bone forms the posterior portion of the hard palate and is demonstrated on a Waters (parietoacanthial) projection?

Accepted Answer

Palatine bone

Answer

The palatine bone forms the posterior one-third of the hard palate and is visible in the Waters projection used for facial bone evaluation.

(GXMO) General X-Ray Machine Operator Practice Test