Common mistakes in BMD testing

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Presentation transcript:

Common mistakes in BMD testing Acquisition Pitfall Incorrect demographic information External artifacts Improper patient positioning Internal artifacts

a) Incorrect Demographic Information

b. External Artifacts not removed from scanned area 18-year-old girl with anorexia nervosa. Dual energy x-ray absorptiometric (DEXA) image shows density superimposed on L4 (arrow) found to be metallic removable piercing not noticed by technologist. Examination was repeated after removal of object, and L4 Z-score decreased from 1.6 to –3 and L1–L4 Z-score from –1.7 to –3.

The spine is too close to the right side of the image

The femur is adducted