This book is a review of GI Nuclear Medicine imaging techniques. It includes the common and the uncommon, including a number of controversial approaches. It starts down the alimentary tract (salivary, esophageal, gastric, small bowel, then colon). It covers biliary imaging, hepatic imaging, and splenic imaging. It is “image-rich” and includes a number of videos. It provides a strong overview of the niche roles that Nuclear Medicine techniques play in the GI tract.