Multileaf collimator for Coline medical accelerators

Janusz Harasimowicz; Grzegorz Plebański; Krzysztof Sajna

doi:10.1117/12.784726

28 December 2007 Multileaf collimator for Coline medical accelerators

Janusz Harasimowicz, Grzegorz Plebański, Krzysztof Sajna

Proceedings Volume 6937, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007; 693727 (2007) https://doi.org/10.1117/12.784726
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007, 2007, Wilga, Poland

Abstract

Multileaf collimator (MLC) allows advanced field shaping for radiation therapy delivered with medical accelerators. In this paper theoretical considerations and scientific studies of a new MLC design are described. Considered multileaf collimator model comprises of a multiplicity of tungsten leaves of 1 cm width projected at isocenter plane. To ensure compatibility of a new MLC solution with different accelerator types as well as to assure high reliability in irradiated environment and presence of strong magnetic field, a complex and independent control system had to be developed. It comprises of two modules - one placed in the accelerator treatment head and the other one placed in the control room. Both of them ensure high reliability and treatment quality while working in harsh conditions. Mechanical design and leaf shape optimization algorithm based on a ray tracing method are also described in details. Adapted solutions allowed providing minimized and uniform radiation penumbrae in the full range of leaves positions which is crucial for modern advanced radiotherapy.

Citation Download Citation

Janusz Harasimowicz, Grzegorz Plebański, and Krzysztof Sajna "Multileaf collimator for Coline medical accelerators", Proc. SPIE 6937, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2007, 693727 (28 December 2007); https://doi.org/10.1117/12.784726

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KEYWORDS

Control systems

Collimators

Head

Field programmable gate arrays

X-rays

Telecommunications

Radiotherapy

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