Nord R H
Lunar Corporation, Madison, WI 53713, USA.
Appl Radiat Isot. 1998 May-Jun;49(5-6):519-20. doi: 10.1016/s0969-8043(97)00065-1.
This study examines how well a Lunar DPX can compensate for certain aging changes in its X-ray source. Total body scans were done on a phantom having variable soft tissue composition. Aging of the X-ray source was simulated by placing a thin aluminum foil over the beam exit window, and by deliberately misadjusting the high voltage power supply. The % fat measurement was found to change by up to 12%, but returned to within about 2% afer recalibration.
本研究考察了一款月球DPX设备能在多大程度上补偿其X射线源的某些老化变化。对具有可变软组织成分的体模进行了全身扫描。通过在束流出口窗口放置一层薄铝箔，并故意误调高压电源来模拟X射线源的老化。结果发现，脂肪百分比测量值变化高达12%，但重新校准后又恢复到约2%以内。
