Geometrical pre-planning for conformal radiotherapy

Tsougos, I; Schreibmann, E; Lahanas, M; Theodorou, K; Kappas, C; Baltas, D

dc.contributor.author	Tsougos, I	en
dc.contributor.author	Schreibmann, E	en
dc.contributor.author	Lahanas, M	en
dc.contributor.author	Theodorou, K	en
dc.contributor.author	Kappas, C	en
dc.contributor.author	Baltas, D	en
dc.date.accessioned	2014-03-01T01:26:24Z
dc.date.available	2014-03-01T01:26:24Z
dc.date.issued	2007	en
dc.identifier.issn	0284-186X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18059
dc.subject.classification	Oncology	en
dc.subject.other	article	en
dc.subject.other	beam therapy	en
dc.subject.other	cancer radiotherapy	en
dc.subject.other	color	en
dc.subject.other	computer assisted radiotherapy	en
dc.subject.other	data base	en
dc.subject.other	feasibility study	en
dc.subject.other	irradiation	en
dc.subject.other	methodology	en
dc.subject.other	priority journal	en
dc.subject.other	statistical analysis	en
dc.subject.other	treatment planning	en
dc.subject.other	Brain Neoplasms	en
dc.subject.other	Humans	en
dc.subject.other	Phantoms, Imaging	en
dc.subject.other	Radiotherapy Planning, Computer-Assisted	en
dc.subject.other	Radiotherapy, Conformal	en
dc.subject.other	Rectal Neoplasms	en
dc.subject.other	Reproducibility of Results	en
dc.subject.other	Urinary Bladder Neoplasms	en
dc.title	Geometrical pre-planning for conformal radiotherapy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/02841860701218600	en
heal.identifier.secondary	http://dx.doi.org/10.1080/02841860701218600	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	The optimum selection of beams and arcs in conformal techniques is of the outmost importance in modern radiotherapy. In this work we give a description of an analytic method to aid optimum selection, which is based on minimizing the intersection between beams and organs at risk (OAR) and on minimizing the intersection between the beam and the planning target volume (PTV). An arc-selection function that permits selection of irradiation arcs based on individual beam feasibility is introduced. The method simulates the treatment process by defining a computed beam feasibility, for every possible set of gantry-table angles, by taking into account accurately computed intersection volumes between the OAR and beams. The beams are shaped to conform the target using realistic parameters for the treatment process. The results are displayed on a virtual sphere centred at the isocenter with color-coded regions indicating beam feasibility. Arcs selections are performed by searching the map for successive gantry positions at a certain table angle, with feasibility values greater than a user-specified threshold. The accuracy of the method was confirmed by using geometrical regular shapes, as well as real clinical cases. © 2007 Taylor & Francis.	en
heal.publisher	TAYLOR & FRANCIS AS	en
heal.journalName	Acta Oncologica	en
dc.identifier.doi	10.1080/02841860701218600	en
dc.identifier.isi	ISI:000249872900005	en
dc.identifier.volume	46	en
dc.identifier.issue	7	en
dc.identifier.spage	918	en
dc.identifier.epage	927	en