双能X射线骨密度仪技术进展综述

骨质疏松的日趋严重使得骨密度的测量越来越受到人们的关注。随着医疗技术的不断进步，双能X射线骨密度仪以其精确的测量结果，较低的辐射剂量以及多种类多型号，被广泛运用于骨质疏松的诊断中。本文介绍骨密度的概念、测量方法和部位，重点介绍双能X射线骨密度测量的基本原理和关键技术。通过不同的分类方法对现有双能X射线骨密度仪进行分析和阐述，并通过硬件和软件对目前双能X射线骨密度仪存在的问题进行分析，对未来该技术的发展趋势进行了讨论和预测。

Review of Developments of the Dual Energy X-ray Absorptiometry Techniques

Due to the serious increasing of osteoporosis, how to obtain accurate bone mineral density has arouse greater attention all over the world. With the development of medical technology, dual energy X-ray absorptiometry is widely applied in the diagnosis of osteoporosis because of its accuracy, low dose and variety. In this paper, we state the concept of bone mineral density, and summarize the methods and the sites of measurement in clinical diagnose of osteoporosis. It focuses on the fundamentals of dual energy X-ray absorptiometry, explores in great depth the key techniques, and elaborates current problems and limitation in both hard ware and software. Accordingly, this paper also discusses and predicts the future development tendency of dual energy X-ray absorptiometry＇s future development and improvement.