Table 1.
Test case | SSD (cm) | Gantry angle | Field sizes (degrees) | Beam modifier (cm) | |
---|---|---|---|---|---|
1. Open square fields a | 100 | 0 | 52, 102, 252 | None | |
2. Extended SSD square fields b | 125 | 0 | 82, 202 | None | |
3. Rectangular fields | 100 | 0 | , | None | |
4a. Wedged square fields c | 100 | 0 | 62, 202, 152 | 45 degrees, 60 degrees | |
4b. Open and wedged with 45‐degree collimator | 100 | 0 | 202 | None, 45 degrees | |
5. Cerrobend‐blocked d mantle field | 100 | 0 | 302 | Block (Fig. 1) | |
6. Isocentric, cm at surface | 6 MV: 90 15 MV: 80 | 0 | 11.12 12.52 | None | |
7. Oblique incidence | 100 | 305, 330 | 102 | None | |
8. Asymmetric half‐beam, e open and wedged | 100 | 0 | 10:10, 10:0 | None, degrees | |
9. Oblique incidence, 45‐degree wedge | 100 | 315 | 102 | Wedge | |
10. Multileaf collimator (MLC) | 100 | 0 | Triangle (Fig. 2) | MLC | |
11. CIRS phantom f and pinpoint chamber (CCI) | 100 | 0 |
|
None | |
12. Rando phantom, g with thermoluminescent dosimeter (TBCC) | 100 | Thorax: 0 Neck: 270 |
|
None |
At CCI, cm only.
Field defined at 100 cm.
Field cm with 60‐degree wedge only.
Cerro Copper and Brass Company, Belfonte, PA.
Jaw defined half‐beam collimation.
CIRS, Norfolk, VA.
The Phantom Laboratory, Salem, NY.
; .