摘要
周围型双能X线骨密度仪(pDEXA)是以测量前臂为主的双能X线骨密度仪,由于前臂骨折比较常见,以及为避免脊柱和髋部的一些影响因素而选用前臂pDEXA进行测量。并且前臂骨周围软组织相对少的多,因此,测量结果的准确性和精确性比较好。虽然前臂pDEXA能够很好的预测各个部位骨折,但预测髋部骨折最好还是使用髋部的BMD,没有必要间接推算。pDEXA测量BMD的放射剂量小,建议操作人员与仪器保持1米距离即可。pDEXA的优点是:测量仪器小、设备费用低,辐射剂量低,体积小便于携带和搬运、扫描程序简单实用。故此类设备适于中小医院使用。
pDEXA is a dual-energy X-ray absortiometry bone measuring system. Forearm measurements are usually recommended as forearm fractures are common and also the influence of spine and hip can be avoided. pDEXA can provide more accrate and precise results due to less soft tissues around the forearms, less accuracy errors and precision errors. Though forearm pDEXA could predict other fractures well, it is not necessary to calculate other fractures risks indirectly, pDEXA has good radiological protection but 1 meter away from the machine is recommended for the technician, pDEXA is small in size, cost less, and easy to carry with low dose of radiation and simple scanning procedure. So it is proper to primary medical institutions.
出处
《中国骨质疏松杂志》
CAS
CSCD
2006年第4期409-414,437,共7页
Chinese Journal of Osteoporosis
关键词
pDEXA
准确性
T值
骨折风险
放射防护
pDEXA
Accuracy errors
T values
Fractures risks
Radiological protection
