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FIGURE 6. (A) Boxcar plots of center-to-center misalignment of head and neck in WB PET/CT studies of patients with standard neck support (group 1) and with vacuum-lock support (group 2). (B and C) Examples of axial (left) and coronal (right) fusion images are shown before and after linear realignment for group 1 (B) and group 2 (C). Effect of realignment is significant in patients without head restraint (group 1) and less noticeable in group 2 because of better intrinsic patient positioning.
