Book excerpt: This is a comprehensive guide for patient preparation, image acquisition, and image interpretation for PET/CT and PET/MR, specifically relevant to melanoma and sarcoma. Imaging specialists and referring physicians are often not as intimately aware of the particulars of PET imaging in management of patients with melanoma and sarcoma and how it could affect their treatment. This book fills that gap by presenting comprehensive information on melanoma, sarcoma, and the role of PET imaging in their diagnosis and management. The book begins by covering the basics of imaging for practicing physicians and trainees. Expert authors then further cover the biological concepts of melanoma and sarcoma and how they relate to imaging, particularly PET, the oncologist’s perspective, and the surgeon’s perspective on imaging for both the imaging specialist and the referring physician. Chapters review topics such as: PET/CT and PET/MR images in melanoma and sarcoma from a systemic approach, false-positives, false-negatives, pitfalls, and molecular imaging beyond PET. Images are used extensively throughout to enhance understanding for the reader. This is an ideal guide for radiologists, nuclear medicine physicians, oncologists, surgeons, trainees and technologists.