Table 3.
CT number ratio (lowest, median and highest values) of ten different stone types.
| 80/140 kV with tin |
80/140 kV without tin |
||||||
|---|---|---|---|---|---|---|---|
| n | Lowest | Median | Highest | Lowest | Median | Highest | |
| Uric acid | 2 | 0.97 | 0.99 | 1.00 | 0.89 | 0.93 | 0.97 |
| Uric acid dihydrate | 4 | 0.96 | 0.96 | 1.07 | 0.97 | 1.02 | 1.14 |
| Ammonium acid urate | 3 | 1.16 | 1.17 | 1.19 | 1.08 | 1.12 | 1.17 |
| Cystine | 9 | 1.37 | 1.40 | 1.50 | 1.19 | 1.33 | 1.43 |
| Struvite | 6 | 1.48 | 1.55 | 1.63 | 1.31 | 1.41 | 1.45 |
| Calcium Oxalate Monohydrate | 3 | 1.69 | 1.73 | 1.75 | 1.50 | 1.53 | 1.57 |
| Calcium Oxalate Dihydrate | 5 | 1.61 | 1.67 | 1.68 | 1.41 | 1.44 | 1.47 |
| Brushite | 9 | 1.57 | 1.63 | 1.77 | 1.39 | 1.47 | 1.59 |
| Carbon Apatite | 2 | 1.73 | 1.78 | 1.84 | 1.50 | 1.52 | 1.55 |
| Hydroxyapatite | 4 | 1.72 | 1.76 | 2.04 | 1.56 | 1.57 | 1.67 |