This document provides an overview of various nuclear medicine imaging procedures, including the radiotracers used and their clinical applications. Some examples covered are 99mTc-HMPAO brain perfusion imaging for evaluating stroke and seizures, 99mTc-MIBI myocardial perfusion scanning for assessing heart disease, 99mTc-DMSA renal scanning in children to identify kidney abnormalities, and 99mTc sulfur colloid lymphoscintigraphy for detecting sentinel lymph nodes in cancers like melanoma. The document discusses the indications, protocols, and interpretations for many common nuclear medicine exams.