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Figure 3

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Taping of MRI high signal markers and the 1st (neutral position) MRI scan. A: Close-up of an MRI high signal marker fixed to the skin tape. B: A high signal marker being taped across the L3 SP. The markers were taped in a horizontal plane across the spinous processes (SPs) of T12, L3, and S1. C: MRI scanning in the neutral position with the high signal markers in place (markers not seen). D: Sagittal scout view MRI showing placement of 2 of the 3 high signal markers. The markers (white arrows) are the distinct, but small, high signal (white) structures visible to the right of (posterior to) the subcutaneous adipose tissue, which has a very high signal along the right side of the image. The intended placement of the high signal markers was directly posterior to the spinous processes (SPs) of T12, L3, and S1. The lower black arrow indicates the SP of L3 and the black arrow at the top of the figure indicates the SP of T12. Consequently, a slight adjustment was made when placing the accelerometer over the SP of L3 (i.e., the accelerometer was placed 1 cm superior to the skin indentation made by the high signal marker). The most inferior (S1) high signal marker was visible on the adjacent image (5 cm lateral) to the image shown in this figure.