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
|
- 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