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Fig. 6 | Radiation Oncology

Fig. 6

From: Finer leaf resolution and steeper beam edges using a virtual isocentre in concurrence to PTV-shaped collimators in standard distance – a planning study

Fig. 6

Measured and calculated beam edges. Source to isocentre distance (SID) 100 cm (continuous line) and source to virtual isocentre distance (SVID) 70 cm (dashed line): Beam edges are set to 50% point for beams of effective 10 × 10 mm2 (nominally 10 × 10 mm2 for SID 100 cm, 14 × 14 mm2 for SVID 70 cm, respectively). Left side (a + c): planned in TPS. Right side (b + d): film measurements. Upper row L (a + b): leaf direction; lower row J (c + d): jaw direction. Depth 10 cm, central axis dose is normalized to 1.0. See also Additional file 3.

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Radiation Oncology

ISSN: 1748-717X

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