Magnetic Resonance Imaging and Ultrasound Comparison With Load Evaluation

The three procedures are conducted simultaneously for upper and lower extremity muscles. A standard muscle ultrasound preset with a fixed depth of 4 cm or 6 cm will be used, depending on which muscle is visualized in accordance with our routine clinical protocols. During the dynamic approach, the transducer will be placed in a longitudinal fixed position on the muscle using a ProbeFix. All measured contractions in the different muscles will be recorded as short ultrasound videos.

In Stage II, all patients and 10 healthy participants will undergo MRI. During the MRI procedure, we evaluate muscle fat fraction, muscle contractile volume, muscle inflammation and edema.