Sports Medicine and Rehabilitation Diagnosis and Diagnostic Imaging
Core concepts
Understand the diagnostic pathway: history and discipline-specific demands, systematic physical and orthopedic examination, gait and dynamic assessment, then targeted imaging. Know the strengths and limits of radiography, ultrasonography, computed tomography, magnetic resonance imaging, and nuclear scintigraphy-what each detects best and its artifacts. Be able to interpret grading schemes for lameness and muscle/joint findings, and understand when advanced imaging changes management versus confirming a clinical diagnosis. Include objective outcome measures: goniometry, circumference, pressure algometry, force plate and inertial sensor data, and their reliability limits.
Traps
Items commonly overstate sensitivity of radiography for soft tissue or early stress injury, or ignore that a normal study does not exclude disease. Another trap is treating a screening finding (incidental radiographic change) as the cause of lameness without localizing on examination. Watch for confusion between diagnostic accuracy and predictive value in a low-prevalence population.
Worked example / rule of thumb
A working dog with subtle forelimb lameness and normal radiographs: use ultrasonography for tendon and muscle, and consider MRI for occult bone or soft-tissue injury. Rule of thumb: localize first with examination and analgesia (e.g., targeted blocks or joint anesthesia where appropriate), image second, and always correlate imaging with the clinical sign.