Table 3.
Summary of the 16 calculi that were missed in 11 patients on the LD-ASIR 70 images
| Size (mm) | Location | Obstructing (y/n) | Attenuation (HU) | LD-CT FBP (conspicuity) | BMI | DLP for LD-CT | DLP for CD-CT | |
|---|---|---|---|---|---|---|---|---|
| 1 | 2.1 | Renal-left inter pole | n | 303 | 0 | 35.6 | 46.23 | 496.84 |
| 2 | 1.5 | Renal-left inter pole | n | 183 | 0 | 35.6 | 46.23 | 496.84 |
| 3 | 2 | Renal-left inter pole | n | 212 | 0 | 35.6 | 46.23 | 496.84 |
| 4 | 1.3 | Renal-left inter pole | n | 139 | 0 | 35.6 | 46.23 | 496.84 |
| 5 | 3.5 | Renal left lower pole | n | 437 | 0 | 29.2 | 33.99 | 474.96 |
| 6 | 2.3 | Renal-right lower pole | n | 278 | 0 | 47.4 | 32.6 | 917.92 |
| 7 | 2.4 | Renal-left inter pole | n | 425 | 0 | 22.9 | 33.31 | 158.84 |
| 8 | 2.5 | Renal-right inter pole | n | 302 | 0 | 19.7 | 30.18 | 171.24 |
| 9 | 2.4 | Renal-left inter pole | n | 314 | 0 | 26.3 | 29.64 | 310.88 |
| 10 | 1.9 | Renal-right lowr pole | n | 201 | 0 | 18.2 | 32.5 | 129 |
| 11 | 2.3 | Renal-left inter pole | n | 215 | 0 | 28.8 | 33.77 | 424.34 |
| 12 | 3 | Renal-right lower pole | n | 419 | 0 | 30.7 | 30.72 | 194.07 |
| 13 | 3.9 | Renal-right upper pole | n | 558 | 0 | 30.7 | 30.72 | 194.07 |
| 14 | 1.7 | Renal-left lower pole | n | 180 | 0 | 28.5 | 38.21 | 437.23 |
| 15 | 2 | Renal-right lower pole | n | 233 | 0 | 28.4 | 48.42 | 299.61 |
| 16 | 2.2 | Renal-right lower pole | n | 299 | 0 | 28.4 | 48.42 | 299.61 |
Relative conspicuity of missed calculi between the CD-CT 5-mm ASIR-40 and the 5-mm LD-CT images reconstructed with FBP is scored on a 0–5 point scale (0 = not seen; 1 = much worse; 3 = equal; 4 = better; 5 = excellent)