Dose-volume histograms computation comparisons using conventional methods and optimized fast Fourier transforms algorithms for brachytherapy

Kemmerer, T; Lahanas, M; Baltas, D; Zamboglou, N

dc.contributor.author	Kemmerer, T	en
dc.contributor.author	Lahanas, M	en
dc.contributor.author	Baltas, D	en
dc.contributor.author	Zamboglou, N	en
dc.date.accessioned	2014-03-01T01:15:33Z
dc.date.available	2014-03-01T01:15:33Z
dc.date.issued	2000	en
dc.identifier.issn	0094-2405	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13585
dc.subject	dose-volume histograms	en
dc.subject	fast Fourier Transformation	en
dc.subject	convolution	en
dc.subject	dose distributions	en
dc.subject	brachytherapy	en
dc.subject.classification	Radiology, Nuclear Medicine & Medical Imaging	en
dc.subject.other	THERAPY	en
dc.title	Dose-volume histograms computation comparisons using conventional methods and optimized fast Fourier transforms algorithms for brachytherapy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1118/1.1312810	en
heal.identifier.secondary	http://dx.doi.org/10.1118/1.1312810	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	In anatomy based optimization procedures for large volume implants the calculation of dose-volume histograms (DVH) accounts for the major part of the time involved and can be as long as a few hours. This time is proportional to the number of seeds or source dwell positions required for the implant. A procedure for the calculation of brachytherapy seed dose distribution calculation employing fast Fourier transforms (FFT) and the convolution theorem has been described by others and was supposed to significantly improve the speed of the dose distribution computation. Using new significantly improved FFT algorithms and various other optimization techniques we have compared the calculated differential and integral DVHs in high dose rate (HDR) brachytherapy with a single stepping source using actual clinical implants. This is so that we could assess the efficiency and accuracy of the FFT method with that of conventional methods. Our results showed that the FFT based method of calculating DVHs in brachytherapy is comparable in speed with conventional dose calculation methods, but only for implants with more than 287 sources. It is therefore of limited practical use even for large implants. This result is in direct opposition to the claim by other authors. (C) 2000 American Association of Physicists in Medicine. [S0094-2405(00)02410-X].	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	MEDICAL PHYSICS	en
dc.identifier.doi	10.1118/1.1312810	en
dc.identifier.isi	ISI:000090089500018	en
dc.identifier.volume	27	en
dc.identifier.issue	10	en
dc.identifier.spage	2343	en
dc.identifier.epage	2356	en