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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Muscle Nerve. 2011 Jul 13;44(3):418–423. doi: 10.1002/mus.22088

Figure 1. Qualitative ultrasound assessment of skeletal muscle pathology using Heckmatt’s rating scale.

Figure 1

Normal (grade I) ultrasound appearance of the biceps brachii and brachialis shows predominantly dark muscle (M) bordered by subcutaneous fat (SC) and a bright, distinct bone reflection (B). Grade II: increased signal in the biceps brachii and brachialis with preserved bone reflection. Grade III: moderately increased signal and reduced bone reflection. Grade IV: markedly increased signal and absent bone reflection.