X-Ray Certification Anatomy and Image Analysis 3

Question 1

On an oblique projection of the lumbar spine, the 'Scottie dog' image is formed by several structures; which structure represents the dog's eye?

Accepted Answer

Pedicle

Answer

The pedicle forms the 'eye' of the Scottie dog on the oblique lumbar spine projection and is evaluated for pars interarticularis defects.

Question 2

On a PA chest radiograph, which hilar structure is normally located more superiorly — the right or the left?

Accepted Answer

Left hilum

Answer

The left hilum is normally positioned 0.5–1.5 cm higher than the right due to the aortic arch and left pulmonary artery anatomy.

Question 3

A radiograph demonstrating the calcaneus in profile with the subtalar joint open is which projection?

Accepted Answer

Lateral calcaneus

Answer

The lateral calcaneus projection places the calcaneus in true profile and opens the subtalar (talocalcaneal) joint for evaluation.

Question 4

The carina, which marks the bifurcation of the trachea, is located at approximately which vertebral level?

Accepted Answer

T4–T5

Answer

The carina lies at approximately the T4–T5 level (sternal angle) and is used as a landmark for endotracheal tube placement verification.

Question 5

Which carpal bone is the most commonly fractured carpal bone, frequently missed on initial radiographs?

Accepted Answer

Scaphoid

Answer

The scaphoid is the most commonly fractured carpal bone, and fractures may be radiographically occult initially due to its position and blood supply.

X-Ray Certification Practice Test