<prompt> A 50-year-old patient with ischemic hea disease develops chest pain. ECG shows ST segment elevation and Q waves. Myocardial necrosis in this patient can be best demonstrated by:Technetium 99 tetrofosminSestambi scanTechnetium 99 PyrophosphateThallium 201  <response>: Myocardial infarct imaging: Tc99m pyrophosphate is used to localize the area of infarct in hea. Area of infarct On thallium scan Perfusion image Cold spot Pyrophosphate scan Infarct image Hot spot 