Abstract:
:We describe a method for independently verifying the dose distributions from pre- and post-implant brachytherapy source distributions. Monte Carlo calculations have been performed to characterize the three-dimensional dose distribution in water phantom from a low-energy brachytherapy source. The calculations are performed in a voxelized, Cartesian coordinate geometry and normalized based upon a separate Monte Carlo calculation for the seed specific air-kerma strength to produce an absolute dose grid with units of cGy hr(-1) x U(-1). The seed-specific, three-dimensional dose grid is stored as a text file for processing using a separate visual basic program. This program requires the coordinate positions of each seed in the pre- or post-plan and sums the kernel file for a three-dimensional composite dose distribution. A kernel matrix size of 81x81x81 with a voxel size of 1.0x1.0x1.0 mm3 was chosen as a compromise between calculation time, kernel size, and truncation of the stored dose distribution as a function of radial distance from the midpoint of the seed. Good agreement is achieved for a representative pre- and post-plan comparison versus a commercial implementation of the TG-43 brachytherapy dosimetry protocol.
journal_name
J Appl Clin Med Physjournal_title
Journal of applied clinical medical physicsauthors
DeMarco JJ,Solberg TD,Agazaryan Ndoi
10.1120/jacmp.v4i1.2543keywords:
subject
Has Abstractpub_date
2003-01-01 00:00:00pages
66-74issue
1issn
1526-9914journal_volume
4pub_type
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journal_title:Journal of applied clinical medical physics
pub_type: 杂志文章
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journal_title:Journal of applied clinical medical physics
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更新日期:2012-11-08 00:00:00
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更新日期:2019-07-01 00:00:00
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更新日期:2018-11-01 00:00:00
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更新日期:2014-03-06 00:00:00
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journal_title:Journal of applied clinical medical physics
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journal_title:Journal of applied clinical medical physics
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