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©The Author(s) 2015.
World J Gastroenterol. Sep 14, 2015; 21(34): 9993-9998
Published online Sep 14, 2015. doi: 10.3748/wjg.v21.i34.9993
Published online Sep 14, 2015. doi: 10.3748/wjg.v21.i34.9993
Table 1 Comparison of stone visualization scores between spectral computed tomography images and polychromatic computed tomography images
| Image | Polychromatic | 40 keV | 140 keV | Calcium base | Lipid base |
| Mean | 4.62 | 4.90 | 4.53 | 4.91 | 4.77 |
| SD | 1.00 | 0.35 | 1.15 | 0.43 | 0.63 |
| P value | 0.00 | 0.00 | 0.00 | 0.00 |
Table 2 Image scores of 40 keV and calcium base images vs polychromatic images (n = 217)
| Polychromatic CT score | Spectral CT score | Number of 40 keV patients | Percentage of 40 keV patients | Number of calcium base patients | Percentage of calcium base patients |
| 1 | 2 | 0 | 0.00% | 1 | 0.46% |
| 1 | 3 | 1 | 0.46% | 1 | 0.46% |
| 1 | 4 | 4 | 1.84% | 2 | 0.92% |
| 1 | 5 | 4 | 1.84% | 5 | 2.30% |
| 2 | 3 | 2 | 0.92% | 1 | 0.46% |
| 2 | 4 | 4 | 1.84% | 1 | 0.46% |
| 2 | 5 | 2 | 0.92% | 4 | 1.84% |
| 3 | 4 | 3 | 1.38% | 1 | 0.46% |
| 3 | 5 | 1 | 0.46% | 3 | 1.38% |
| 4 | 5 | 9 | 4.15% | 11 | 5.07% |
| ≤ 3 | > 3 | 14 | 6.45% | 14 | 6.45% |
Table 3 Stone grouping and comparison of spectral computed tomography images and polychromatic computed tomography images n (%)
| Group (score) | Polychromatic images | 40 keV images | 140 keV images | Calcium base images | Lipid base images |
| Negative group (1-2) | 21 (9.68) | 3 (1.38) | 28 (12.90) | 5 (2.30) | 12 (5.53) |
| Positive group (3-5) | 196 (90.32) | 214 (98.62) | 189 (87.10) | 212 (97.70) | 205 (94.47) |
| Total | 217 | 217 | 217 | 217 | 217 |
- Citation: Chen AL, Liu AL, Wang S, Liu JH, Ju Y, Sun MY, Liu YJ. Detection of gallbladder stones by dual-energy spectral computed tomography imaging. World J Gastroenterol 2015; 21(34): 9993-9998
- URL: https://www.wjgnet.com/1007-9327/full/v21/i34/9993.htm
- DOI: https://dx.doi.org/10.3748/wjg.v21.i34.9993