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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.