bone-to-bone , iliosacral joint-to-os sacrum and joint-to-joint ratios were computed using the region-of-interest technique 2 to 3 hrs . after injection of 99mtc sn-methylene-diphosphonate or 99mtc sn-pyrophosphate in 139 patients with skeletal diseases ( bone tumours , degenerative changes of the spine and joints , inflammatory changes of joints ) as well as in 123 patients with normal skeletal states .
C0022417
joints
C0003864
inflammatory changes