Physica Medica: European Journal of Medical Physics
Volume 28, Issue 1 , Pages 1-6, January 2012

A 4-bank multileaf collimator provides a decomposition advantage for delivering intensity-modulated beams by step-and-shoot

Joint Department of Physics, Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Downs Road, Sutton, Surrey, SM2 5PT, UK

Received 12 May 2011; received in revised form 10 August 2011; accepted 24 August 2011. published online 12 September 2011.

Abstract 

During the delivery of intensity-modulated radiation therapy (IMRT) by the multileaf collimator (MLC) step-and-shoot technique, it is required to sequence the two-dimensional intensity-modulated beams (2D IMBs) into a series of components that can be shaped with the MLC. In this paper it is shown that the use of an MLC that has four banks of leaves (in two orthogonal pairs) instead of two banks only is advantageous for this purpose.

Keywords: IMRT, 4-Bank MLC, Modulation-decomposition techniques, Step-and-shoot

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PII: S1120-1797(11)00121-9

doi:10.1016/j.ejmp.2011.08.003

Physica Medica: European Journal of Medical Physics
Volume 28, Issue 1 , Pages 1-6, January 2012

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