The value of quantitative radioisotope scanning in the differential diagnosis of low back pain and sacroiliac disease.

The specificity of scintigraphic scanning in detecting inflammatory sacroiliitis has been investigated. The sacroiliac band profile (R[Band]) was used and a new index (R[SIJ/F]) comparing the sacroiliac joint with the ipsilateral femur is described. Using the R (Band) index the mean value (1.