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Table 4 Estimated radiation dose of lung CT and CTDIvol with the 16-slice Toshiba medical systems aquilion

From: Low-dose CT scan screening for lung cancer: comparison of images and radiation doses between low-dose CT and follow-up standard diagnostic CT

CT Scans Low-dose CT scan
CT dose soft WAZA-ARI ImPACT CT-EXPO
Auto exposure control Without AEC Without AEC Without AEC
Sex Male Female Average adult Male Female
mAs 22.5 – 37.5 22.5 - 37.5 37.5 37.5 37.5
Lung (mGy) 2.7 – 4.6 3.1 – 5.2 5.8 5.3 5.3
Liver (mGy) 2.7 – 4.5 2.8 – 4.7 4.8 4.7 4.8
Breast (mGy) 2.1 – 3.5 2.2 – 3.6 4.3 5.4 5.4
ICRP103 (mSv) 1.7 – 2.8 1.5 – 2.5 3.4 - -
ICRP60 (mSv) 1.5 – 2.5 1.3 – 2.2 2.9 2.8 3.3
DLP (mGy cm) 84 – 140 71 – 119 168 203 203
CTDIvol (mGy) 2.1 – 3.5 2.1 – 3.5 3.5 3.3 3.3
Average of DLP indicated value of 16 Toshiba rows CT (mGy x cm) 59.8 (n = 4) – 99.7(n = 15)
CT Scans Follow–up standard diagnostic CT scan
CT dose soft WAZA–ARI ImPACT CT–EXPO
Auto exposure control With AEC Without AEC Without AEC
Sex Male Female Average adult Male Female
mAs 150 (Max) 150 (Max) 150 150 150
Lung (mGy) 15.1 – 22.1 17.9 – 25.2 23.0 21.0 21.2
Liver (mGy) 18.6 – 21.5 19.0 – 22.5 19.0 18.7 19.3
Breast (mGy) 10.4 – 17.0 11.6 – 17.5 17.0 21.4 21.4
ICRP103 (mSv) 11.1 – 13.8 9.4 – 12.1 14.0 - -
ICRP60 (mSv) 10.3 – 12.5 8.5 – 10.6 12.0 11 13
DLP (mGy cm) 545 – 679 455 – 574 673 810 810
CTDIvol (mGy) 13.5 – 16.8 13.3 – 16.8 13.9 13.3 13.3
Average of DLP indicated value of 16 Toshiba rows CT (mGy x cm) 474.7 (n = 19)
  1. *These radiation transport calculations were performed using the JM phantom with WAZA-ARI, and the MIRD-5 type phantom with ImPACT and the GSF phantom with CT-Expo. The JM phantom was constructed from CT images of a healthy Japanese male adult. The height and the weight were 171 cm and 65 kg, respectively. The MIRD-5 type phantom was a hermaphroditic adult. For the MIRD–5 type phantom, the height and the weight were 174 cm and 70 kg, respectively. For the GSF-ADAM phantom, the height and the weight were 170 cm and 70 kg, respectively. For the GSF-EVA phantom, the height and the weight were 160 cm and 60 kg, respectively.