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. Author manuscript; available in PMC: 2015 Nov 1.
Published in final edited form as: Clin Radiol. 2014 Sep 18;69(11):1171–1177. doi: 10.1016/j.crad.2014.08.001

Figure 1.

Figure 1

Intra-individual, objective comparison of volume and attenuation of residual colonic fluid at CTC following NaP and MgC regimen using automated QA software. (a) Three-dimensional map of the correctly segmented colon (left) following the NaP regimen in a 55-year-old man. Automatically calculated total colonic residual fluid and average attenuation were 111 ml and 979 HU, respectively. (b) Three-dimensional map of the correctly segmented colon (left) following MgC regimen in the same man 6 years later at the age of 61 years. Automatically calculated total colonic residual fluid and average attenuation were 139 ml and 719 HU, respectively. Two-dimensional axial CTC images before (middle) and after (right) automated digital subtraction of residual colonic fluid allowed verification of correct capture. Note that not only large fluid collections (arrows) are captured but also smallest fluid residues (arrowheads).