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FIGURE 10. Proprietary graphical display (GE Healthcare), detector block–by–detector block, of relative values of PET scanner operational parameters derived from blank scan, including coincidence counting rate, singles counting rate, detector dead time, coincidence timing window, and energy setting. Such display allows operator to quickly and easily discern out-of-tolerance results, displayed with grossly different (i.e., lower) intensity than within-tolerance results. (A) Display for acceptable blank scan; that is, blank scan for which all detector parameters are within tolerance. (B) Display for blank scan in which coincidence counting rate, singles counting rate, and dead-time results for 1 block detector are out of tolerance, indicated by black areas (arrows) in respective displays. (Courtesy of Dr. Osama Mawlawi, M.D. Anderson Cancer Center, Houston, TX.)
