Use of a whole‐body counter in bone scanning

Abstract

A new method of whole-body assay for abnormal concentration of bone-seeking radioactive isotopes, in this instance SrS5, has been performed in 40 patients with excellent results. The instrument used is a whole-body counter which employs 18 NaI (Tl) crystals (9 by 2 in.) in a 3 x 6 array which permits bilateral comparisons of isotope concentration. crystal-to-crystal comparisons, and body area comparisons. Very small amounts of isotope (1-10 pc, Sr") are required. In 40 patients, one false positive and no false negative findings were obtained. The findings were confirmed by scintiscanning and X-ray studies.

The radioisotope skeletal survey

“…A special whole body counter has been used to screen patients for bone lesions (Gardner and Johnston, 1969). The instrument employs 18 NaI (Tl) noncollimated crystals, each one measuring 9 by 2 inches, arranged in three rows of six beneath a hemieylindrical tray.…”