Fig. 2

Planning a ^99mTc MDP SPECT study of the knees on the Valiance X12 prototype. The planning contours are overlaid on top of a transaxial slice of a low-resolution preview knee study. (1) Detector proximity contour (blue). Detectors are planned to encircle this contour. It is noteworthy that closer proximity for this patient was not possible due to the patient bed and cushions underneath the bent knees and bed straps on both sides. (2) Total activity contour (green), used to instruct the system to focus the detectors only within this ROI. (3) ROI contour (red). Used to instruct the system to dedicate more acquisition time when the detectors are focusing at this region, in accordance with user preferences (typically 50–90%)