Cerebral infarction: a disparity between Tc-99m-pertechnetate and Tc-99m-EHDP images.

A case of cerebral infarction that showed a disparity between Tc-99m-pertechnetate and Tc-99m-EHDP brain images is presented. Serial Tc-99m-ertechnetate and Tc-99m-EHDP brain images showed not only different lesion-to-nonlesion ratios but different distribution patterns. Tc-99m-labeled phosphate compounds may be useful in the estimation of prognosis in cerebral infarction as well as in differential diagnosis between cerebral infarction and cerebral tumors.