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Table 1 Examined reconstruction protocols (n = 16)

From: Optimization of SPECT/CT imaging protocols for quantitative and qualitative 99mTc SPECT

  Iterations and subsets SCF
Quantitative reconstructionsa
 Clinical acquisition protocolb 4i/10s 0.41 and 1.10
5i/15s 0.41 and 1.10
24i/10s 0.41 and 1.10
 NEMA acquisition protocolc 4i/10s 0.41 and 1.10
5i/15s 0.41 and 1.10
24i/10s 0.41 and 1.10
Diagnostic reconstructionsd
 Clinical acquisition protocolb 2i/10se 0.41 and 1.10e
 NEMA acquisition protocolc 2i/10s 0.41 and 1.10
  1. aWithout postfiltering,
  2. bSixty projections with 20 s/projection,
  3. cOne hundred twenty projections with 10 s/projection,
  4. dWith postfiltering (Butterworth, cut-off frequency = 0.5 cycles/cm, power = 10)
  5. eInstitutional standard for diagnostic imaging, 2i/10s and SCF = 1.10
  6. SCF scatter weighting factor