This issue of PET Clinics focuses on Molecular Imaging and Precision Medicine, Part 1, and is edited by Dr. Rathan Subramaniam. Articles will include: What is Precision Medicine?; Molecular Imaging and Precision Medicine in Head and Neck Cancer; Therapy Response Assessment using Molecular Imaging and Precision Medicine; Molecular Imaging and Precision Medicine in Breast Cancer; Molecular Imaging and Precision Medicine in Dementia and Movement Disorders; Molecular Imaging and Precision Medicine in Prostate Cancer; Molecular Imaging and Precision Medicine in Lymphoma; Radionucleide Therapies in Molecular Imaging and Precision Medicine, PET based Precision Medicine in Thyroid Carcinoma; Molecular Imaging and Precision Medicine in Lung Cancer, and more!