What does a Vertebral Fracture Assessment (VFA) NOT measure?

• A. Bone mineral density (BMD)
• B. Vertebral heights
• C. Fracture presence
• D. Low radiation dose

Answer: (A)

The Vertebral Fracture Assessment (VFA) is a technique used primarily to identify vertebral fractures and assess vertebral heights without specifically measuring bone mineral density (BMD). VFA utilizes dual-energy X-ray absorptiometry (DXA) imaging of the spine to provide visual evidence of fractures and other structural changes in vertebrae.

While the VFA can assess vertebral heights and confirm the presence of fractures, it does not measure BMD directly. Instead, the primary focus of a VFA is on the morphology of the vertebrae, looking for signs of deformity that would indicate a fracture or changes in height due to osteoporosis or other conditions. Therefore, while bone mineral density is an important factor in assessing overall bone health, it is not a direct measurement provided by the VFA process.

In contrast, options discussing vertebral heights, fracture presence, and low radiation dose pertain to the assessments and advantages of the VFA in helping diagnose conditions affecting the spine while maintaining minimal exposure to radiation, which is an integral aspect of the technique.