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Updated: Sep 7, 2026

In Vivo Quantitative Assessment of Myocardial Structure, Function, Perfusion and Viability Using Cardiac Micro-computed Tomography
Published on: February 16, 2016
99mTc-MIBI, 99mTc-tetrofosmin and 99mTc-Q12 in vitro and in vivo
B F Bernard1, E P Krenning, W A Breeman
1Department of Nuclear Medicine, University Hospital Dijkzigt and Erasmus University Medical School, Rotterdam, The Netherlands.
Abstract:
The aim of this study was to compare uptake of 99mTc-MIBI, 99mTc-tetrofosmin and 99mTc-Q12 in vitro and biodistribution in vivo in rats. In vitro, uptake decreased in the order MIBI-->tetrofosmin-->Q12. Uptake of MIBI and tetrofosmin, but not of Q12, in cultured tumor cells was dependent on the plasma membrane and mitochondrial potential. In vivo, heart uptake of all three compounds was high and stable. Tumor uptake decreased in the order MIBI-->Q12-->tetrofosmin and the tumor/blood ratio in the order MIBI-->tetrofosmin-->Q12.
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