When we think of ultrasound for muscle injuries, most of us picture the obvious tear the dramatic fibre gap, the hematoma, the black hole on the screen. But in reality, the value of ultrasound goes far beyond spotting the “big injuries.”
Done well, a muscle ultrasound provides clinicians with a systematic map of the entire muscle–tendon unit from tendon insertion, through the myotendinous junction, all the way into the deep aponeuroses. That information changes decision-making on the sideline and in the clinic.
So how do we get there? Evidence-based guidelines (OCEBM) give us a step-by-step framework. Here’s what every sports clinician should keep in mind:
1. Patient Positioning: Comfort and Access Matter
Quadriceps? Supine. Hamstrings? Prone. Gluteals? Lateral decubitus.
It sounds simple, but poor positioning is the number one reason clinicians struggle with image quality. Comfort + access = better scans.
2. Choose the Right Probe
Linear probe (7–15 MHz): Best for tendons, ligaments, superficial muscle.
Curvilinear (2–7 MHz): Best for deeper muscles (glutes, proximal thigh).
Rule of thumb: use the highest frequency that gives you depth without sacrificing resolution.
3. Artefact Avoidance: Don’t Chase Shadows
Ultrasound artefacts can trick even experienced clinicians. Adjust gain, depth, frequency, and angle. Use beam steering or scan in oblique planes when needed.
A small tilt or rock of the probe can turn “pathology” into artefact and save you from over-calling a finding.
4. Start Broad, Then Focus
Begin with transverse (short-axis) scans, then rotate to longitudinal (long-axis) once you’ve found an area of concern. Always use palpation to correlate with the athlete’s point of maximal tenderness.
5. Don’t Skip the Systematic Sweep
Scan the entire muscle–tendon unit: insertion → MTJ → belly → aponeuroses.
Partial tears, intramuscular injuries, and subtle aponeurotic disruptions are easy to miss if you only “spot check.”
6. Go Dynamic
Static scans tell only half the story. Have the athlete contract, resist, or move through range. Look for loss of contraction, fibre gapping, or hematoma shifting.
Dynamic assessment = better sensitivity for partial tears.
7. Always Compare Side to Side
Your best control? The other limb.
Subtle asymmetries in echotexture, thickness, or contraction pattern often separate “normal variant” from true pathology.
8. Use Doppler Wisely
Power Doppler can highlight hyperemia, neovascularity, or inflammatory activity, especially in tendinopathy.
But remember: flow ≠ pain. Always interpret Doppler findings in clinical context.
Take-Home Message
A high-quality muscle ultrasound isn’t about racing to find a tear. It’s about following a systematic, evidence-based process that maximizes accuracy and gives clinicians confidence in their decisions.
Ultrasound = first-line for dynamic, real-time, sideline or clinic ready assessment.
MRI = second-line for complex, chronic, or surgical cases.
The real power of ultrasound lies in its ability to link structure with function and prognosis exactly what matters most in sport.
References
Palermi S, Scavone A, Anzà M, et al. Diagnostic ultrasound of muscle injuries: what the sports medicine clinician should know. Br J Sports Med. 2025;0:1–12. doi:10.1136/bjsports-2025-110255