Question

Peripheral dual energy x-ray absorptiometry calculates bone density by scanning all the bones in the body.

A.True
B.False

Answer 1

The claim that peripheral dual energy x-ray absorptiometry scans all the bones in the body is false. p-DEXA devices measure bone density at specific peripheral sites, while central DEXA machines perform full-body scans.

Step-by-step explanation:

The statement Peripheral dual energy x-ray absorptiometry calculates bone density by scanning all the bones in the body is False. Peripheral dual-energy x-ray absorptiometry (p-DEXA) devices measure bone density at peripheral sites like the wrist or heel, not the entire body. The full-body bone density scans are actually performed by central DEXA machines, which are used to assess bone density in the hip and spine, which are more predictive of osteoporosis-related fractures.

The Dual-Energy X-ray Absorptiometry (DEXA) scan is a much more advanced technique compared to standard X-ray imaging since it can also determine fat content and lean tissue mass by directing two low-dose X-ray beams through the body and determining the amount of energy absorbed from the beams, which varies based on the composition of the different tissues.

Answer 2

The claim that peripheral dual energy x-ray absorptiometry scans all the bones in the body is false. DEXA scans mainly assess bone density in specific areas, particularly where osteoporosis-related fractures are most common, such as the hip and spine.

Step-by-step explanation:

The statement 'Peripheral dual energy x-ray absorptiometry calculates bone density by scanning all the bones in the body' is false. Dual-energy X-ray absorptiometry, commonly known as DEXA or DXA, primarily measures bone density in specific areas of the body, typically the hip and spine, which are common sites of fractures related to osteoporosis. DEXA is a valuable tool for diagnosing and tracking osteoporosis and other conditions that cause bone loss.

DEXA works by directing two low-dose X-ray beams with different energy levels through the bone. By measuring the absorption of each beam, healthcare providers can calculate the bone density. Bones with higher mineral content absorb more X-rays, resulting in a higher bone density measurement.

While CT scans can provide three-dimensional images and might be used in some scenarios for bone imaging, they are distinct from DEXA scans and are not specifically designed to measure bone density.