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    • 5. 发明申请
    • Bone density measuring device
    • 骨密度测量装置
    • US20090131799A1
    • 2009-05-21
    • US11918988
    • 2006-04-21
    • Shigeo TanakaMasamichi NogawaKenichi Yamakoshi
    • Shigeo TanakaMasamichi NogawaKenichi Yamakoshi
    • A61B6/00
    • A61B5/4509A61B5/0059G01N21/359G01N21/4795G01N21/49G01N2201/0623G01N2201/0627
    • A small and inexpensive, noninvasive bone density measuring device is provided. A measuring part of the bone density measuring device is constituted by a light emitter 120, which emits near-infrared light, and a light receiver 130, which receives light via a bone of a measuring subject, arranged in a holder 110. Bone density is measured by inserting an arm, for example, in the holder 110 and measuring light absorption (absorbance) by the arm bone. The light emitter 120 and the light receiver 130 are connected to a control unit 140. The control unit 140 controls the light emitter 120 to emit light, inputs a measured value from the light receiver 130, and displays it as bone density. In order to remove the influence of light from the background or difference in bone thickness, ratio of absorbance between two wavelengths is preferably employed. In order to obtain light of twowavelengths, use ofasingle light receiving element is possible by making two light emitting elements (LEDs) alternately emit light even in the case of using two light emitting elements.
    • 提供了一种小而廉价的非侵入性骨密度测量装置。 骨密度测量装置的测量部分由发射近红外光的光发射器120和经由测量对象的骨骼接收光的光接收器130布置在保持器110中。骨密度为 例如通过将臂插入保持器110中并通过臂骨测量光吸收(吸光度)来测量。 光发射器120和光接收器130连接到控制单元140.控制单元140控制发光器120发光,从光接收器130输入测量值,并将其显示为骨密度。 为了消除背景光或骨厚差的影响,优选采用两种波长之间的吸光度比。 为了获得二波长的光,即使在使用两个发光元件的情况下,也可以通过使两个发光元件(LED)交替地发光来使用单个光接收元件。