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. 2021 Jan 30;7(1):e06063. doi: 10.1016/j.heliyon.2021.e06063

Table 8.

Occupational doses to the lens of the eye, CT imaging settings, and CT dose indices by profession of CT-assisting personnel (n = 91 procedures, June 2017–May 2018).

Profession Intensive care physician (n = 6, 72 procedures)
Pediatrician (n = 2, 6 procedures)
Radiological technologist (n = 3, 13 procedures)
ANOVA (P value) Total (n = 11, 91 procedures)
Mean ± SD Median [range] Mean ± SD Median [range] Mean ± SD Median [range] Mean ± SD Median [range]
Analysis point
Outside radiation safety glasses (Hp(3)) [mSv] 0.55 ± 0.39 0.49 [0.12–2.49] 0.53 ± 0.42 0.30 [0.15–1.18] 0.41 ± 0.41 0.28 [0.07–1.64] 0.094 0.53 ± 0.39 0.43 [0.07–2.49]
Inside radiation safety glasses (Hp(3)) [mSv] 0.26 ± 0.15 0.23 [0.05–1.05] 0.23 ± 0.15 0.14 [0.09–0.46] 0.19 ± 0.15 0.15 [0.06–0.65] 0.108 0.25 ± 0.15 0.21 [0.05–1.05]

CT imaging setting, CT dose index
Tube voltage [kVp] 120 ± 3 120 [100–135] 107 ± 9 100 [100–120] 117 ± 7 120 [100–120] <0.001 120 ± 6 120 [100–135]
Tube current [mA] 4,131.2 ± 2,522.4 3,847.5 [968.0–13,196.0] 720.8 ± 741.6 339.0 [211.3–2,148.0] 1,650.0 ± 1,253.8 1177 .0 [116.0–5,178.0] <0.001 3,532.2 ± 2,570.1 3,373.0 [67.0–13,196.0]
CTDIvol [mGy] 44.5 ± 24.7 48.6 [8.8–119.9] 23.6 ± 14.4 21.0 [2.2–42.5] 51.8 ± 25.4 45.3 [10.9–100.0] 0.650 41.5 ± 25.0 44.0 [2.2–119.9]
DLP [mGy・cm] 1,802.2 ± 947.7 1,561.0 [280.4–4,824.6] 474.2 ± 367.8 360.1 [26.9–1,063.4] 1,072.0 ± 703.1 862.9 [18.1–2,543.8] <0.001 1,577.7 ± 972.5 1,462.8 [18.1–4,824.6]

CTDIvol, volume computed tomography dose index.

DLP, dose-length product.

Hp(3), 3-mm dose-equivalent (personal dose equivalent).

SD, standard deviation.

Homogeneity of the three profession groups was confirmed using the Kruskal-Wallis test.