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. 2018 Oct 15;8:15274. doi: 10.1038/s41598-018-33666-7

Figure 3.

Figure 3

Echogenicity of parasternal intercostal muscle. Typical ultrasound images of parasternal intercostal muscle (right 3rd intercostal muscle) with square to measure region of interest for quantitative grayscale analysis showing (A) higher echogenicity and (B) lower echogenicity. Insets depict respective histograms of grayscale analysis (range 0 [black] to 255 [white]) with mean value recorded.