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Table 5 Dose-length product (DLP) and volumetric computed tomography dose index (CTDIvol) for “CT Head WO”, “CT Chest WO” and “CT Abd/Pelv WO”: data for exams in line with the study common name and for all exams

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

  DLP all hospitals (mGy × cm) CTDIvol all hospitals (mGy) Number of exams
Median 25th percentile 75th percentile Median 25th percentile 75th percentile
CT Head WO
 In line with SCN (A) 933 798 1022 58.6 54.2 58.9 25,252
 All data (B) 1011 827 1024 57.8 53.3 58.9 26,965
 Δ = (B - A)/B + 7.7% + 3.5% + 0.2% -1.4% -1.7% 0.0%  
CT Chest WO
 In line with SCN (A) 274 205 349 7.2 5.7 8.6 5,994
 All data (B) 268 190 349 7.0 5.4 8.5 6,542
 Δ = (B - A)/B -2.2% -7.9% 0.0% -2.9% -5.6% -1.2%  
CT Abd/Pelv WO
 In line with SCN (A) 553 438 710 11.2 9.0 14.0 1,512
 All data (B) 569 446 769 11.2 8.9 14.0 1,692
 Δ = (B - A)/B + 2.8% + 1.8% + 7.7% 0.0% -1.1% 0.0%