Whole-Body Autoradiography of 99 Tcm-Labelled Pyrophosphate and Related Compounds in Young Rats

Abstract
The distribution of 99Tcm-labelled pyrophosphate in young rats was analysed by wholebody autoradiography and compared with those observed for 99Tcm-pertechnetate, 32P-labelled pyrophosphate and 85Sr-chloride. 99Tcm-labelled pyrophosphate was rapidly accumulated in bone and dentine and was similar to 32P-labelled pyrophosphate and 85Sr-chloride. The uptake of these substances in developing enamel was rather low in contrast to 99Tcm-pertechnetate, which had no affinity for bone.

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