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Table 1 Dose-length product (DLP) and volumetric computed tomography dose index (CTDIvol) for the study common name “CT Head WO”: data from individual hospitals, total and reference values

From: Analysis of a multicentre cloud-based CT dosimetric database: preliminary results

  Number of exams/number of scanners DLP (mGy × cm)
Median (25th–75th percentile)
CTDIvol (mGy)
Median (25th–75th percentile)
Hospital 1 9,961/6 853 (798–898) 54.8 (53.3–57.8)
Hospital 2 5,578/2 1,131 (1,004–1,339) 60.4 (51.3–60.9)
Hospital 3 11,031/4 1,017 (830–1,022) 58.6 (54.8–58.7)
Hospital 4 395/1 1,121 (969–1,468) 68.4 (60.5–76.0)
Total 26,965/13 1,011 (827–1,024) 58.6 (53.3–58.9)
ISTISAN 17/33 [18] 1,382 69.0
RP 180 [19] 1,000 (760–1,300)* 60 (50–75)*
Canadian survey [20] 1,276 (1,084–1,463) 74.4 (60.1–79.1)
  1. *Most common value (range)