Improved Model on Minimizing Static Intensity Modulation Delivery Time

In Intensity Modulated Radiation Therapy static intensity modulation delivery, leaf sequencing is basically a process where the intensity map is broken down into subfields or segments that can be implemented by multileaf collimators. The purpose of this study was to investigate a new method to impro...

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Bibliographic Details
Main Authors: Jia Jing, Ruifen Cao, Yican Wu, Guoli Li, Hui Lin, Mengyun Cheng, Xi Pei, Weihua Kong, Gui Li
Format: Conference Proceeding
Language:English
Subjects:
Biomedical applications of radiation
Collimators
Constraint optimization
Intensity modulation
Iterative algorithms
Linear programming
Matrix decomposition
Monitoring
Nuclear and plasma sciences
Physics
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Summary:In Intensity Modulated Radiation Therapy static intensity modulation delivery, leaf sequencing is basically a process where the intensity map is broken down into subfields or segments that can be implemented by multileaf collimators. The purpose of this study was to investigate a new method to improve the Langer's integer programming model. The method is to choose the horizontal or orthogonal leaf direction of intensity map according with Xia and Verhy's alogrithm and invoke a new constraint to optimize multileaf collimator leaf travel distances. A comparative study of three different leaf sequencing methods, Xia and Verhey, Langer et al., and our improved model is presented. The numerical outputs reveal that model modifications can yield better results according with the three criteria: total number of monitor unit, number of segment and leaf travel distances.
ISSN:1948-2914
1948-2922
DOI:10.1109/BMEI.2009.5305406