This system was composed of a personal computer, a liquid scintillation counter and a welltype NaI (Tl) scintillation counter. The radioactivity of smear samples was automatically measured by these counters. The personal computer received raw signals from the counters through an interface of RS-232C. The software for the computer evaluated the surface concentration of each nuclide, and printed out that value along with other items as a report. The software was programmed in Pascal language. This system was successfully applied to routine survey for contamination in our facility.
Myocardial perfusion imaging with99mTc-teboroxime was performed on patients with ischemic heart disease (IHD) or suspected of IHD, which was compared with thallium scintigraphy. Results from the teboroxime imaging were well correspondent with findings in the Tl-scintigraphy, indicating its high sensitivity and specificity. Imaging should be started immediately after the injection of teboroxime, because it cleared from myocardium very rapidly. Additional information about ischemia might be obtained by measurement of its clearance rate from myocardium.