Figure 6

Semi-variogram plots during needle rotation in the same non-surgical subject shown in Figure 5. Semi-variograms correspond to different regions of interest (all 10 mm × 5 mm) shown on B-scan image (top left) and cumulative displacement map (top right). Regions of interest A-C are located within subcutaneous tissue (SC), regions D-F are within perimuscular fascia (PMF) and regions G-I are within muscle. Needle position is indicated by oblique line originating from left upper corner of the B-scan and displacement images.