Detailed Sensitivity Data for Measurement with LEHR Collimator

LEHR collimator, 68Ga and 99mTcClose (10 cm)Distant (∼60 cm)
With PET source (frame 4)
 Full detector2551497
 Within PET ROI362.6
 Within SPECT ROI5.22.0
With SPECT source (frame 5)
 Full detector8273
 Within SPECT ROI7436
 Within PET ROI0.0010.006
  • cps = counts per second.

  • Data were calculated using Equation 4. Figure 6 shows ROI positions. If dead-time correction had been applied, numbers with PET source would have been somewhat higher for close detector and slightly higher for distant detector (Table 2).