Principles of MSK Scanning and Indications
Musculoskeletal ultrasound evaluates tendons ligaments muscles joints and peripheral nerves and offers dynamic assessment that complements clinical examination and other imaging modalities. Indications include tendon tears tendinopathy bursitis joint effusions nerve entrapment and guidance for injections and aspirations. High frequency linear transducers provide the spatial resolution needed to visualize fine structures and dynamic maneuvers such as active muscle contraction or joint movement reveal pathology that static imaging may miss. Comparative scanning of the contralateral side helps distinguish normal variants from pathology and systematic documentation of probe orientation and of anatomical landmarks supports reproducibility. Understanding sonoanatomy and common pathology patterns enables technologists to acquire targeted images that answer specific clinical questions and to provide accurate measurements and descriptions for reporting.
Technique for Tendon and Ligament Assessment
Tendon imaging requires attention to anisotropy which can mimic pathology when the beam is not perpendicular to the tendon fibers and technologists adjust probe angle to confirm true structural defects. Longitudinal and transverse views document fiber continuity thickness and vascularity and power Doppler assesses hyperemia associated with active inflammation. Dynamic assessment during tendon loading can reveal subluxation or impingement and guided injections use real time imaging to place therapeutic agents precisely while avoiding neurovascular structures. Ligament evaluation follows similar principles with careful attention to joint positioning and to comparison with the contralateral side. Documentation includes measurements of tear size and of retraction when present and notes on associated joint effusion or synovial proliferation. High quality MSK scanning supports both diagnosis and interventional planning.
Nerve Imaging and Peripheral Neuropathy
High resolution ultrasound visualizes peripheral nerves and can detect enlargement focal constriction and changes in echotexture associated with entrapment or inflammatory neuropathies. Common targets include the median nerve at the carpal tunnel ulnar nerve at the elbow and tibial and peroneal nerves at the ankle and knee. Dynamic maneuvers such as nerve gliding and provocative positioning help reproduce symptoms and reveal positional compression. Measurement of cross sectional area and comparison with normative values supports diagnosis and severity assessment and Doppler may show increased vascularity in inflammatory conditions. Ultrasound guided hydrodissection and targeted injections provide therapeutic options and require precise needle visualization and sterile technique. Collaboration with neurology and with electrodiagnostic services enhances diagnostic accuracy and patient management.