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Table 1 Translations to align attenuation maps to SPECT image (mean ± SD)

From: Breath-hold CT attenuation correction for quantitative cardiac SPECT

Attenuation map Direction
Right/left (mm) Up/down (mm) Cephalad/caudal (mm)
TCT 0.0 ± 0.0 0.0 ± 0.0 2.4 ± 2.1
CT at MID 2.8 ± 7.1 −2.6 ± 3.9 11.7 ± 8.0
CT at INS 4.5 ± 6.0 −4.7 ± 5.4 6.2 ± 7.3
CT at EXP −1.5 ± 3.5 0.0 ± 5.1 19.9 ± 5.8
  1. CT, computed tomography; EXP, end-expiration; INS, end-inspiration; MID, midpoint; TCT, transmission computed tomography.