Musculoskeletal Ultrasound After a Collision: What It Can Show, What It Cannot Show, and When MRI May Be Needed

Musculoskeletal ultrasound can provide real-time imaging of selected muscles, tendons, bursae, and other superficial soft tissues. In the right clinical situation, it can answer a focused question during the same visit. It is not a replacement for every other imaging study.

Where ultrasound is most useful

Ultrasound is particularly useful for selected soft-tissue structures that can be visualized dynamically. Common examples include rotator-cuff tendons, biceps tendon, bursae, certain muscle injuries, and other superficial musculoskeletal structures. Dynamic imaging can also show how a structure behaves with movement.

Why in-office imaging can matter

When a focal question can be answered with ultrasound, imaging at the point of care can shorten the time between examination and management. A significant finding may change rehabilitation loading, support an orthopedic referral, or clarify whether additional imaging is warranted.

What ultrasound does not evaluate well

Ultrasound has important limitations. It is not the preferred study for every spinal, neurologic, intra-articular, bone, or deep soft-tissue problem. Some structures are inaccessible to ultrasound, and some questions are better answered with MRI, CT, radiography, or specialist evaluation.

A normal ultrasound does not end the workup

If the history and examination continue to suggest pathology that ultrasound cannot adequately evaluate, a normal study should not be used to dismiss the patient’s symptoms. The next step depends on the clinical question.

When MRI may be more appropriate

MRI may be appropriate when the suspected pathology involves structures better visualized with cross-sectional imaging, when symptoms suggest disc or neural involvement, when the ultrasound question is incomplete, when surgical planning is being considered, or when persistent symptoms remain unexplained after an appropriate evaluation.

Credentialing and interpretation

At Cityside, musculoskeletal ultrasound is performed by Dr. Mark Mulak, who holds the RMSK credential. Credentialing does not make ultrasound appropriate for every patient; it supports competence in performing and interpreting the examination when clinically indicated.

The best use of ultrasound is focused: define the question, determine whether ultrasound is the right modality, interpret the finding with the history and examination, and refer for other imaging when the question requires it.