The favorable nuclear properties in combination with the rich coordination chemistry make technetium-99m the radioisotope of choice for the development of myocardial perfusion tracers. In the early 1980s. [99mTc]Tc-Sestamibi. [99mTc]Tc-Tetrofosmin. https://www.markbroyard.com/special-deal-sally-hansen-insta-dri-midnight-drive-supply-super-offer/