| 摘要 |
<p>An apparatus for determination of the mineral content in bones and comprising an X-ray source (12) capable of releasing X-ray radiation at at least two different energy levels for radiation of a preselected target area, and a camera part including a scintillator (22) receiving the X-ray radiation which have passed through the target area and emitting visible light, a CCD-sensor (25), and optical means for focusing the radiation from the scintillator on the CCD-sensor (25). The CCD-sensor communicates with an electronic circuit adapted to read out the CCD-sensor and to transfer data signals to a computer, said data signals representing the received radiation intensity and consequently a number of images (usually two received at their respective energy level) of the part of a person which should be examined. The apparatus is adapted to limit the energy content of the X-ray radiation emitted through the person in such a manner that the skin of said person is not subjected to more than a predetermined, allowed amount of energy. In this mananer an apparatus for determination of the mineral content in bones of living persons is provided, and this apparatus is smaller and less expensive than the hitherto known apparatuses at the same time as it is easy and quick to use, whereby the examination can be performed by a specialized physician.</p> |
