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Fig. 1 | Radiation Oncology

Fig. 1

From: Radiotoxicity in robotic radiosurgery: proposing a new quality index for optimizing the treatment planning of brain metastases

Fig. 1

Derivation of the V12 model a: Measured OCR-curves for the 12 available collimator sizes of the CK system at a depth of 10 cm and 80 cm source-detector distance, r is the radial distance of the central axis. b: Sum dose profiles calculated by Eq. 3 where R represents the radial distance of the target center. c: Gradient of sum dose profiles calculated by numerical differentiation. d: Mean values of the dose gradient (in the range between 12 Gy and PD) are plotted as a function of the target radius (approximated by radial distance R of the sum dose profiles at 65%)

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Radiation Oncology

ISSN: 1748-717X

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