【摘要】 目的通过应用双能X线骨密度仪(DXA)测量腰椎和股骨骨密度(BMD)中几个技术问题研究,指出在测量和分析结果时值得注意的几个问题。方法比较同一患者选择标准束和薄型束扫描股骨近端结果的不同;对腰椎各椎体间T评分差>1s时,分析不同方法的差别;列举1例患者比较股骨颈感兴趣区微小变化对诊断结果的影响。结果对瘦体型患者薄型束扫描骨边缘比标准束完整,各部位BMD值有增加,在大粗隆部位二者T评分相差最大可超过3s;正常人相邻椎体间T评分差<1s,患者1L3和L4相差2.2s,患者2L2和L3相差1.3s,患者3L2和L3相差1.5s,相邻椎体间差均>1s;股骨颈感兴趣区重心位置在X轴线上从124变为120微小移动,股骨颈的T评分从-2.7s增至-2.4s。结论正确测量和分析技术对获得可靠诊断结果至关重要,需要进一步认真研究。更多还原

【Abstract】 Objective Through research on measurement technology of bone mineral density (BMD) at lumber and hip, point out some important technology in measurement and analysis. Methods The different result of scan at hip were compared using standard and thin X ray for patients. When T score different of close two lumbers were large than 1 s, the different result was reported and reason was analyzed. When slightly moving ROI position of neck, the different results of BMD and T score at neck, trocant and total hip were compared. Results Bone edge was clearer and BMD of average parts at hip were larger when using thin X Ray than standard X ray for thin patients. T score different of close two lumbers was less 1 s for healthy subjects. T score different of L3 and L4 was 2.2 s for patient 1, T score different of L2 and L3 was 1.3 s for patient 2. T score different of L2 and L3 was 1.5 s for axis. T score at neck was changed from -2.4 s to -2.7 s. Conclusion Correct measurement and analysis technology is very important for diagnosing osteoporosis, more technology key needed further discussed.更多还原