DXA / DEXA

これは何か

DXA estimates bone mineral density using low-dose X-rays. Reports usually include BMD plus T-score or Z-score where appropriate.^[1,2]

なぜ重要か

It is a common way to document bone density and fracture-risk context, but it is not the whole definition of bone strength.^[1]

どの判断に影響するか

• DXA often measures hip and spine because those sites are common fracture sites in osteoporosis.^[1]
• Some DXA systems can also perform vertebral fracture assessment, a low-dose spine image used to look for vertebral compression fractures.^[2]

解釈上の注意

• Machine, site, positioning, artifacts, degenerative change, and body size can affect interpretation.^[3]

関連疾患