This document summarizes different imaging modalities for musculoskeletal injuries including ultrasound, x-ray, CT, bone scan, MRI, and PET. It provides examples of images from each modality and discusses their strengths and weaknesses in terms of safety, cost, complexity, and what types of contrasts they provide. It also includes several case studies demonstrating how different modalities can be used to diagnose and characterize various bone and soft tissue injuries.