TABLE V.
The mean percentages of pixels passing for gamma analysis (±2%/2 mm criteria) comparing film-measured dose to calculated dose for two repeated film measurements (with metal implants in place). Comparisons were performed for the four possible combinations of the two error-reduction strategies (CT AR methods and MK).
| Mean % pixels passing | |||||
|---|---|---|---|---|---|
| Phantom | AR method | Baselinea | AR | Baseline + MK | AR + MK |
| Spine phantom | o-mar | 81.0 | 77.9 | 82.9 | 80.2 |
| gsi 140 keV | 74.3 | 62.4 | 80.7 | 60.3 | |
| mars 140 keV | 74.3 | 43.5 | 80.7 | 46.4 | |
| Dental phantom | o-mar | 69.8 | 72.0 | 70.5 | 71.8 |
| gsi 140 keV | 68.1 | 67.3 | 69.0 | 66.7 | |
| mars 140 keV | 68.1 | 71.6 | 69.0 | 70.4 | |
a
Baseline imaging was Philips 120 kVp for o-mar and GE 120 kVp for both gsi 140 keV and mars 140 keV imaging.