DEXA Scan Operation & Technique 2

Question 1

When performing a lumbar spine DXA scan, which vertebrae are typically included in the standard analysis region?

Accepted Answer

L1 through L4

Answer

The standard lumbar spine DXA analysis region is L1 through L4, as these vertebrae provide the most reliable BMD measurements.

Question 2

A patient has severe scoliosis affecting the lumbar spine. What is the most appropriate alternative site for BMD measurement?

Accepted Answer

Distal forearm (33% radius)

Answer

The distal forearm (33% radius site) is the recommended alternative when the lumbar spine cannot be accurately measured due to scoliosis or other artifacts.

Question 3

What is the correct patient position for a proximal femur DXA scan?

Accepted Answer

Hip internally rotated 15–20°, leg abducted

Answer

The femur must be internally rotated 15–20° and the leg slightly abducted to place the femoral neck parallel to the scan table for accurate measurement.

Question 4

Which of the following scan modes should be selected for a very thin patient (< 60 kg) undergoing a spine DXA scan?

Accepted Answer

Thin/standard mode

Answer

A thin or standard scan mode should be used for low-BMI patients to ensure appropriate X-ray beam penetration and image quality.

Question 5

During a DXA scan, what does the technologist confirm by reviewing the scan image BEFORE releasing the patient?

Accepted Answer

That positioning, ROI placement, and image quality are acceptable

Answer

The technologist must review positioning, region-of-interest placement, and overall image quality before releasing the patient to ensure a repeat scan is not needed.

(DEXA) DEXA Bone Density Scan Certification Practice Test

(DEXA) DEXA Bone Density Scan Certification Practice Test

DEXA Scan Operation & Technique 2