Radiography Exam Patient Positioning & Procedures

Question 1

Which projection of the chest is considered the standard for routine chest radiography?

Accepted Answer

PA erect

Answer

The PA erect projection is standard for chest radiography because it minimizes heart magnification and allows full lung expansion.

Question 2

When positioning a patient for a lateral projection of the lumbar spine, which anatomical landmark is centered to the image receptor?

Accepted Answer

L3 vertebra (iliac crest level)

Answer

For a lateral lumbar spine, the central ray is directed to L3, which corresponds approximately to the level of the iliac crest.

Question 3

What degree of obliquity is used for an AP oblique projection of the lumbar spine (RPO/LPO) to visualize the zygapophyseal joints?

Accepted Answer

45 degrees

Answer

A 45-degree oblique angle is used for AP oblique lumbar spine projections to place the zygapophyseal joints perpendicular to the beam.

Question 4

For an AP projection of the knee, the central ray is directed to which landmark?

Accepted Answer

0.5 inch (1 cm) below the patellar apex

Answer

The central ray for an AP knee is directed to the knee joint, approximately 0.5 inch below the patellar apex.

Question 5

Which position requires the patient to lie on their side with the x-ray beam directed horizontally?

Accepted Answer

Lateral decubitus

Answer

The lateral decubitus position has the patient lying on their side with a horizontal beam, useful for detecting air-fluid levels.

Radiography Exam Practice Test