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Table 3 Mean error (ME) and mean absolute error (MAE) in the CT numbers of each site: lung, soft tissue, bone regions, and whole image

From: A cycle generative adversarial network for improving the quality of four-dimensional cone-beam computed tomography images

Site Image ME (HU) MAE (HU)
Lung 4D-CBCT 595.3 ± 122.5 595.3 ± 122.5
sCT 55.9 ± 46.7 64.3 ± 32.5
p value < 0.01 < 0.01
Soft tissue 4D-CBCT 378.1 ± 111.5 378.1 ± 111.5
sCT 38.3 ± 92.8 72.9 ± 65.9
p value < 0.01 < 0.01
Bone 4D-CBCT 390.1 ± 93.0 390.1 ± 93.0
sCT − 7.5 ± 96.5 78.9 ± 49.5
p value < 0.01 < 0.01
Whole image 4D-CBCT 424.3 ± 88.4 424.3 ± 88.4
sCT 111.1 ± 17.4 111.1 ± 17.4
p value < 0.01 < 0.01
  1. These values were calculated with respect to the CT numbers in the 4D-MSCT images and are shown in terms of mean ± standard deviation for 10 patients in each site. The p value was obtained by a comparison of the results of the 4D-CBCT and sCT images using a two-tailed t test