Isotropic beam bouquets for shaped beam linear accelerator radiosurgery

Thomas H WAGNER; Sanford L MEEKS; Frank J BOVA; William A FRIEDMAN; John M BUATTI; Lionel G BOUCHET

doi:10.1088/0031-9155/46/10/305

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Isotropic beam bouquets for shaped beam linear accelerator radiosurgery

Journal article

Peer reviewed

Isotropic beam bouquets for shaped beam linear accelerator radiosurgery

Thomas H WAGNER, Sanford L MEEKS, Frank J BOVA, William A FRIEDMAN, John M BUATTI and Lionel G BOUCHET

Physics in medicine & biology, Vol.46(10), pp.2571-2586

2001

DOI: 10.1088/0031-9155/46/10/305

PMID: 11686276

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Abstract

In stereotactic radiosurgery and radiotherapy treatment planning, the steepest dose gradient is obtained by using beam arrangements with maximal beam separation. We propose a treatment plan optimization method that optimizes beam directions from the starting point of a set of isotropically convergent beams, as suggested by Webb. The optimization process then individually steers each beam to the best position, based on beam's-eye-view (BEV) critical structure overlaps with the target projection and the target's projected cross sectional area at each beam position. This final optimized beam arrangement maintains a large angular separation between adjacent beams while conformally avoiding critical structures. As shown by a radiosurgery plan, this optimization method improves the critical structure sparing properties of an unoptimized isotropic beam bouquet, while maintaining the same degree of dose conformity and dose gradient. This method provides a simple means of designing static beam radiosurgery plans with conformality indices that are within established guidelines for radiosurgery planning, and with dose gradients that approach those achieved in conventional radiosurgery planning

Biological and medical sciences

Miscellaneous

Medical sciences

Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases

Radiotherapy. Instrumental treatment. Physiotherapy. Reeducation. Rehabilitation, orthophony, crenotherapy. Diet therapy and various other treatments (general aspects)

Details

Title: Subtitle: Isotropic beam bouquets for shaped beam linear accelerator radiosurgery
Creators: Thomas H WAGNER - Southside Cancer Center, Radiation Oncology Department. 5742 Booth Road, Jacksonville. FL 32207, United States
Sanford L MEEKS - Southside Cancer Center, Radiation Oncology Department. 5742 Booth Road, Jacksonville. FL 32207, United States
Frank J BOVA - Southside Cancer Center, Radiation Oncology Department. 5742 Booth Road, Jacksonville. FL 32207, United States
William A FRIEDMAN - Southside Cancer Center, Radiation Oncology Department. 5742 Booth Road, Jacksonville. FL 32207, United States
John M BUATTI - Southside Cancer Center, Radiation Oncology Department. 5742 Booth Road, Jacksonville. FL 32207, United States
Lionel G BOUCHET - Southside Cancer Center, Radiation Oncology Department. 5742 Booth Road, Jacksonville. FL 32207, United States
Resource Type: Journal article
Publication Details: Physics in medicine & biology, Vol.46(10), pp.2571-2586
Publisher: Institute of Physics; Bristol
DOI: 10.1088/0031-9155/46/10/305
PMID: 11686276
ISSN: 0031-9155
eISSN: 1361-6560
Language: English
Date published: 2001
Academic Unit: Radiation Oncology; Neurosurgery; Otolaryngology
Record Identifier: 9984040461902771

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