GXMO Anatomy and Radiographic Procedures Flashcards

For a lateral wrist projection, the wrist is positioned so that the ulna and radius are:

Answer: Superimposed

In the lateral wrist projection, the ulna and radius should be directly superimposed to confirm true lateral positioning.

The Caldwell projection (PA axial) of the skull uses a tube angle of:

Answer: 15 degrees caudad

The Caldwell projection uses a 15-degree caudad angle to project the petrous ridges into the lower one-third of the orbits.

Which body position is used to demonstrate free air in the peritoneal cavity when a patient cannot stand?

Answer: Left lateral decubitus

The left lateral decubitus position places the right side up so free air rises and is visible against the liver, away from the gastric bubble.

The Towne projection (AP axial) of the skull is used primarily to demonstrate the:

Answer: Occipital bone and dorsum sellae

The Towne projection demonstrates the occipital bone, foramen magnum, and dorsum sellae by angling the central ray 30–35 degrees caudad.

For an AP pelvis projection, the patient's feet and lower limbs should be:

Answer: Internally rotated 15–20 degrees

Internal rotation of 15–20 degrees places the femoral necks parallel to the image receptor, providing an unobstructed view of the femoral necks.

Which view of the foot best demonstrates the longitudinal arch?

Answer: Weight-bearing lateral

The weight-bearing lateral projection of the foot demonstrates the true height and shape of the longitudinal arch under normal loading conditions.