Research Article
Lateral Penumbra Modelling Based Leaf End Shape Optimization for Multileaf Collimator in Radiotherapy
Table 5
Summary of optimal leaf ends and penumbral properties.
| | Leaf end curve | Design variables (cm) | Penumbra mean (cm) | Standard deviation (cm) |
| | Circular arc | R = 16.213, d = | 0.198 | 0.0130 |
| | Elliptical arc | b = 0.728 | 0.209 | 0.0207 |
| | Cubic Bézier | P1 = (−1.594, 1.077), P2 = (0.814, 0.748) | 0.210 | 0.0005 |
| | B-spline | | 0.197 | 0.0066 |
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Y denotes the set of -axis values of control points P0 to P7.
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