| 摘要 |
<p>A method of determining bone density includes placing a bone-containing target between attenuation measurement means and at least one radioisotope gamma ray source having an electromagnetic radiation spectrum with at least two characteristic peak penetrating emissions at different energies, and exposing the target to penetrating electromagnetic radiation from the source. The attenuation or relative attenuation of the at least two peak electromagnetic radiation emissions through the target is measured, and the bone density is determined from the attenuation measurements.</p> |
