Table 1.
Dose results of CT protocols used in this national survey on CT radiation doses
| Protocol name | Clinical indication | Relative frequency (%) | Median scan range (mm) | Median (P75) DLP (mGy cm) | Median (P75) E103 (mSv) | Ratio max/min E |
|---|---|---|---|---|---|---|
| Brain | Haemorrhage | 23.8 | 155 | 813.7 (935.6) | 1.5 (1.8) | 3.3 |
| Sinus | Sinusitis | 9.0 | 116 | 105.7 (133.4) | 0.2 (0.3) | 4.9 |
| Neck | Standard | 2.3 | 252 | 329.9 (404.3) | 1.7 (2.1) | 2.2 |
| Neck-thorax-abdomen | Standard | 0.7 | 880 | 985.1 (1,117.6) | 13.8 (15.6) | 1.7 |
| Thorax | Standard | 6.6 | 313 | 320.0 (346.5) | 4.6 (5.0) | 2.8 |
| Thorax-liver | Lung cancer | 4.1 | 401 | 542.0 (608.1) | 8.1 (9.1) | 2.7 |
| Thorax-abdomen | Standard | 9.5 | 687 | 813.8 (885.7) | 11.6 (12.6) | 3.9 |
| Thorax HR | Interstitial Dz | 3.1 | 273 | 142.8 (276.1) | 2.1 (4.0) | 13.4 |
| Abdomen | Standard | 20.0 | 441 | 567.0 (618.0) | 8.0 (8.7) | 4.8 |
| Abdomen low-dose | Urolithiasis | 2.1 | 399 | 301.6 (329.4) | 4.5 (4.9) | 3.3 |
| CT urography | Haematuria | 2.8 | 452 | 708.0 (981.6) | 10.0 (13.8) | 2.5 |
| Liver multiphasic | Liver Tx | 1.1 | 419 | 1,322.2 (1,496.6) | 19.4 (22.4) | 1.4 |
| Pancreas multiphasic | Adeno ca | 0.6 | 409 | 899.0 (1,000.0) | 13.2 (14.7) | 2.0 |
| Kidney multiphasic | RCC | 0.4 | 381 | 1,166.5 (1,371.2) | 17.0 (20.2) | 3.1 |
| CT coronary angio | CAD | 1.5 | 125 | 516.5 (671.4) | 13.5 (20.1) | 3.0 |
| CT pulmonary angio | PE | 4.8 | 279 | 291.5 (371.0) | 4.2 (5.4) | 2.7 |
| CTA total aorta | Dissection | 0.7 | 666 | 822.5 (836.8) | 11.7 (11.9) | 1.1 |
| CTA abdominal aorta | AAA | 1.8 | 474 | 555.5 (727.1) | 7.8 (10.3) | 3.8 |
| C-Spine | Standard | 2.5 | 213 | 276.0 (320.9) | 1.4 (1.6) | 5.4 |
| L-Spine | Standard | 1.5 | 171 | 308.2 (405.5) | 4.3 (5.7) | 3.2 |
| Bony pelvis | Standard | 1.0 | 223 | 332.0 (382.1) | 4.3 (4.9) | 1.6 |
P75 75th percentile, DLP dose length product, E103 effective dose according to ICRP-103, Dz disease, Tx transplantation, ca carcinoma, RCC renal cell cancer, CAD coronary artery disease, PE pulmonary embolism, AAA abdominal aortic aneurysm