Table 4.
Visual grading regression (VGR) coefficients for all six criteria with estimated dose reduction values for comparison of images reconstructed with ADMIRE 3, ADMIRE 5 and filtered back projection (FBP) for dose interval between quality references (Qref) mAs 98 and 42
| Criterion | Regression coefficients | Estimated dose reduction (95% confidence limits) |
|||
|---|---|---|---|---|---|
| log (mAs) | ADMIRE 3 | ADMIRE 5 | ADMIRE 3 | ADMIRE 5 | |
| 1. Liver parenchyma | 2.28*** | 0.57*** | –0.08° | 22% (11%; 33%) |
− |
| 2. Pancreatic contours | 2.00*** | 0.92*** | 1.73*** | 37% (26%; 48%) |
58% (53%; 63%) |
| 3. Kidneys and proximal ureters | 2.21*** | 1.11*** | 2.09*** | 40% (31%; 49%) |
61% (57%; 66%) |
| 4. Lymph nodes < 15 mm in diameter | 1.72*** | 1.05*** | 1.93*** | 46% (35%; 57%) |
67% (63%; 72%) |
| 5. Image noise | 2.38*** | 1.50*** | 3.16*** | 47% (39%; 55%) |
74% (71%; 76%) |
| 6. Overall image quality | 2.69*** | 1.06*** | 1.10*** | 33% (24%; 41%) |
34% (27%; 40%) |
***p < 0.001, ° not significant