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. 2020 Feb 12;21:96. doi: 10.1186/s12891-020-3119-6

Fig. 1.

Fig. 1

Lumbar multifidus muscle cross-sectional area (CSA) measurement in a male soccer player at the L5 vertebral level (prone position). The CSA measurement was also used to obtain echo-intensity measure in the prone position using the ImageJ histogram function