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FIGURE 3. Respiratory signal recorded during HCT before PET. Recording was made with strain gauge monitoring respiratory motion around waist at sampling frequency of 1 kHz. Scout scan was taken to survey anatomy; during this scan, patient was breathing freely (FB). After scout scan was taken, patient was instructed to prepare for limited breath-hold (BH) at midexpiration for HCT. It was noted that patient held breath at state different from any breathing state before breath-hold.
