TABLE 3.
Passing rates of three consecutive measurement results using film, diode array (Mapcheck), ion chamber array (MatriXX) and electronic portal imaging device (EPID) based on gamma index values for 6 fields of patient 1. The data shown for patient 1 in Table 2 is the average of first measurement set of data in Table 3
| Measurement | Field 1 | Field 2 | Field 3 | Field 4 | Field 5 | Field 6 | |
|---|---|---|---|---|---|---|---|
| Film | 1st | 98.95 | 98.97 | 91.20 | 97.86 | 98.88 | 98.66 |
| 2nd | 97.90 | 98.93 | 91.18 | 98.74 | 98.28 | 98.71 | |
| 3rd | 97.58 | 98.42 | 91.15 | 99.24 | 98.65 | 98.26 | |
| Mean (SD) | 98.14 (0.59) | 98.77 (0.25) | 91.18 (0.02) | 98.61 (0.57) | 98.60 (0.25) | 98.54 (0.20) | |
| Mapcheck | 1st | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 |
| 2nd | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | |
| 3rd | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 | |
| Mean (SD) | 100.00 (0.00) | 100.00 (0.00) | 100.00 (0.00) | 100.00 (0.00) | 100.00 (0.00) | 100.00 (0.00) | |
| MatriXX | 1st | 99.29 | 98.41 | 99.57 | 99.30 | 99.10 | 98.97 |
| 2nd | 99.30 | 99.25 | 99.57 | 99.28 | 99.06 | 99.01 | |
| 3rd | 99.29 | 99.24 | 99.58 | 99.29 | 99.00 | 98.99 | |
| Mean (SD) | 99.29 (0.00) | 98.97 (0.39) | 99.57 (0.00) | 99.29 (0.01) | 99.05 (0.04) | 98.99 (0.02) | |
| EPID | 1st | 99.80 | 99.40 | 99.60 | 98.90 | 98.80 | 100.00 |
| 2nd | 99.90 | 99.60 | 99.70 | 99.20 | 99.10 | 100.00 | |
| 3rd | 99.80 | 99.60 | 99.45 | 99.05 | 98.90 | 99.90 | |
| Mean (SD) | 99.83 (0.05) | 99.53 (0.09) | 99.58 (0.10) | 99.05 (0.12) | 98.93 (0.12) | 99.97 (0.05) |
SD = standard deviation