Table 10 CTDl and DLP values for Abdomen and Lumbar spine CTs in 4 facilities
Facility | CTDIvol mGy | DLP mGy.cm | |||||||
|---|---|---|---|---|---|---|---|---|---|
1st quartile | 2nd quartile | 3rd quartile | 75th/25th percentile | 1st quartile | 2nd quartile | 3rd quartile | 75th/25th percentile | Effective dose | |
Abdomen, n=132 | |||||||||
A | 8.37 | 12.56 | 17.96 | 2.15 | 945 | 1188 | 1601 | 1.69 | 19.7 (8.1) |
B | 6.41 | 7.56 | 10.18 | 1.59 | 590 | 789 | 1215 | 2.06 | 14.2 (6.2) |
D | 3.07 | 4.09 | 5.21 | 1.70 | 292 | 406 | 498 | 1.71 | 6.2 (1.2) |
E | 6.9 | 8.28 | 10.31 | 1.49 | 1129 | 1495 | 1685 | 1.49 | 25.8 (20.9) |
75th percentile (NDRLs) | 12.54 | 1418.25 | 15.6 (2.6) | ||||||
Facility | CTDIvol mGy | DLP mGy.cm | ||||||
|---|---|---|---|---|---|---|---|---|
1st quartile | 2nd quartile | 3rd quartile | 75th/25th percentile | 1st quartile | 2nd quartile | 3rd quartile | 75th/25th percentile | |
Lumbar spine, n=98 | ||||||||
Facility A | 14.81 | 19.48 | 23.23 | 1.57 | 620 | 889.43 | 987 | 1.59 |
Facility B | 14.87 | 19.48 | 26.39 | 1.77 | 515 | 707 | 849 | 1.65 |
Facility D | 9.83 | 11.18 | 12.39 | 1.26 | 345 | 360 | 382 | 1.11 |
Facility F | 13.55 | 17.03 | 20.91 | 1.54 | 583.73 | 703.66 | 925.11 | 1.58 |
75th percentile (NDRLs) | 19.48 | 843.82 | ||||||