Parameter | 6 MV | 6 XFFF | 10 MV | 10 XFFF | 15 MV |
(TPR20/10) Measured/Cal. | 0.6660/0.67 | 0.6317/0.63 | 0.7394/0.7 | 0.7075/0.71 | 0.7637/0.77 |
Avg. Jaw Transmission (%) | 0.4581 | 0.2892 | 0.5457 | 0.3179 | 0.5574 |
MLC Interleaf Transmission (%) |
|
|
|
|
|
Average/Maximum | 1.749/2.022 | 0.982/1.938 | 1.969/2.266 | 0.939/1.173 | 2.052/2.344 |
DLG (cm) | 2.1 | 1.8 | 2.4 | 2.3 | 2.5 |
Cr Plane Beam Symmetry (%) |
|
|
|
|
|
At Dmax/10 cm Depth |
|
|
|
|
|
5 × 5 | 100.2/100.2 | 100.2/100.1 | 100.4/100.4 | 100.2/100.2 | 100.4/100.3 |
10 × 10 | 100.3/100.2 | 100.3/100.2 | 100.4/100.3 | 100.2/100.3 | 100.4/100.3 |
30 × 30 | 100.3/100.2 | 100.3/100.4 | 100.4/100.4 | 100.3/100.4 | 100.7/100.5 |
Cr Plane Beam Flatness (%) |
|
|
|
|
|
At Dmax/10 cm Depth. |
|
|
|
|
|
5 × 5 | 0.28/1.18 | - | 0.73/1.57 | - | 1.02/1.58 |
10 × 10 | 0.70/2.30 | - | 1.20/2.40 | - | 1.00/2.30 |
30 × 30 | 1.90/1.90 | - | 2.00/1.70 | - | 2.80/2.60 |
Radiation Penumbra flat Beam |
|
|
|
|
|
(20% - 80%) for 10 × 10 cm2 |
|
|
|
|
|
Dmax (Lt/Rt)* | 0.55/0.5 | - | 0.66/0.65 | - | 0.67/0.68 |
10 cm (Lt/Rt)* | 0.72/0.71 | - | 0.76/0.75 | - | 0.77/0.78 |
Surface Dose (%) (With PPC05) |
|
|
|
|
|
5 × 5 | 57.4 | 66.4 | 37.0 | 47.6 | 32.3 |
10 × 10 | 61.1 | 68.9 | 42.5 | 50.6 | 38.6 |
15 × 15 | 66.3 | 71.9 | 49.1 | 54.0 | 46.5 |
20 × 20 | 69.5 | 73.5 | 54.1 | 56.8 | 52.5 |
30 × 30 | 75.0 | 77.2 | 62.2 | 59.6 | 61.5 |