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Table 2 Ranges of activity and count rates, per phantom

From: Comprehensive SPECT/CT system characterization and calibration for 177Lu quantitative SPECT (QSPECT) with dead-time correction

Acquisition typePhantomTotal no. of acquisitionsaActivity range (MBq)Photopeak count rate range (cps)Wide-spectrum (18–680 keV) count rate range (cps)
PlanarAir-2D3419–15,123208–97,638851–375,605
TomographicAir-3D3532–15,274327–92,2751342–370,033
CTDI-102113–12,05393–64,027665–367,557
CTDI-161716–13,54083–61,456695–377,300
CTDI-322121–18,62550–60,328513–380,170
Jaszczak3044–18,985307–55,2702650–386,006
  1. aThis is the total number of acquisitions performed for each phantom, but only subsets of acquisitions with an activity within the usable range of the system were used to derive the calibration factor and dead-time constant (Tables 3 and 4)