X-Ray Certification Anatomy Recognition 4

Question 1

On an AP abdomen radiograph, the psoas muscle shadow is visible along which structure?

Accepted Answer

Transverse processes of L1–L5

Answer

The psoas shadow runs obliquely along the lateral borders of L1–L5 vertebral bodies and their transverse processes.

Question 2

Which radiographic sign describes air outlining the lateral wall of the bowel on an abdominal X-ray, suggesting bowel wall infarction?

Accepted Answer

Pneumatosis intestinalis

Answer

Pneumatosis intestinalis is gas within the bowel wall, indicating mucosal ischemia or infarction on abdominal radiographs.

Question 3

On a standard PA hand radiograph, which joint space is assessed for calcium pyrophosphate deposition disease in the triangular fibrocartilage region?

Accepted Answer

Distal radioulnar joint

Answer

CPPD commonly calcifies the triangular fibrocartilage complex, visible at the distal radioulnar joint on hand/wrist radiographs.

Question 4

On a lateral ankle radiograph, which structure is seen as the posterior process of the talus and may be confused with a fracture?

Accepted Answer

Os trigonum

Answer

The os trigonum is an accessory ossicle posterior to the talus, a normal variant that can mimic a fracture fragment.

Question 5

Which bony landmark is used on an AP pelvis radiograph to determine the center-edge angle of Wiberg?

Accepted Answer

Femoral head center and lateral acetabular edge

Answer

The center-edge angle of Wiberg is measured between the vertical through the femoral head center and the line to the lateral acetabular rim.

X-Ray Certification Practice Test