Quantitative Parameters Derived from Jaszczak Phantom Images Acquired in Different Energy Windows
| Value at the following window center ± width (keV) | ||||
|---|---|---|---|---|
| Parameter | 68 ± 10% | 73 ± 15% | 75 ± 15% | 77 ± 15% |
| Relative sensitivity | 1 | 1.28 | 1.14 | 1.05 |
| Contrast | 0.42 | 0.52 | 0.45 | 0.45 |
| Physicians* | 0 | 1 | 1 | 2 |
↵* Number of physicians who accepted corresponding images as best among 4 sets of images.
Difference between conventional window setting and window setting of 77 ± 15% keV was highly significant (P < 0.01), except for relative sensitivity.