Quality control aspects of the Philips multileaf collimator

Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology
A R Hounsell, T J Jordan

Abstract

Linear accelerators equipped with multileaf collimators (MLCs) are becoming more common and are widely available from most commercial manufacturers. There is a need to ensure they retain their commissioning specification using a preventative maintenance and quality control (QC) programme. This paper considers the design criteria of the Philips MLC which are important to the production of a comprehensive quality control programme. The specific QC problems related to MLCs are identified as the positional accuracy of the leaves and their relationship to the back-up collimators, leakage considerations, the relationship of X-ray to light field and the influence of gravity on the positioning and leakage characteristics of the leaves. These problems are considered in relation to the general design considerations of the MLC, and methods of performing routine quality control checks are discussed. The introduction of MLCs into clinical use results in new QC procedures being developed but it can be concluded that for the Philips MLC only an extra 30 min of QC time is needed per month and that its use has added little to the general down-time of this department.

References

May 1, 1988·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·J Rassow

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Citations

Oct 23, 2010·Medical Physics·Courtney R BuckeyNiko Papanikolaou
Oct 7, 2006·Medical Physics·Laure ParentAndrew Fielding
Jul 22, 2014·International Journal of Biological Macromolecules·Shamkant B Badgujar, Raghunath T Mahajan
Feb 1, 2007·Physics in Medicine and Biology·M Sastre-PadroU A van der Heide
Nov 14, 1998·Physics in Medicine and Biology·J R Sykes, P C Williams
May 28, 2019·Medical Physics·Bijan ArjomandyYuki Kase
Jun 8, 2000·Physics in Medicine and Biology·G J BudgellK J Brown

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