Geometric accuracy evaluation of the new VERO stereotactic body radiation therapy system

Author

Depuydt, Tom ; Haas, Olivier C. L. ; Verellen, Dirk ; Erbel, Stephan ; de Ridder, Michael ; Storme, Guy

Author_Institution

Radiotherapy Dept., Univ. Hosp. UZ Brussel, Brussels, Belgium

fYear

2010

fDate

7-10 Sept. 2010

Firstpage

1

Lastpage

6

Abstract

Real-time tracking of moving tumors is one of today´s challenges in radiation therapy. This work investigates the tracking performance of VERO, a novel treatment device with gimbaled linear accelerator, especially designed for four dimensional image guided radiotherapy. It is found that the significant impact of organ motion on dose distribution can be overcome by combining a polynomial predictor with a prediction horizon of 50ms with the VERO tracking system. Tracking errors can be reduced from 1.7mm to 0.6mm for realistic patient signals as well as sine wave from 5 to 30 bpm.

Keywords

biological organs; biomedical equipment; dosimetry; geometry; linear accelerators; radiation therapy; tumours; VERO stereotactic body radiation therapy system; VERO tracking system; dose distribution; geometric accuracy evaluation; gimbaled linear accelerator; image guided radiotherapy; organ motion; patient signals; polynomial predictor; real-time tracking performance; sine wave; tracking errors; treatment device; tumors; measurements; medical robot; position accuracy; radiotherapy; tracking;

fLanguage

English

Publisher

iet

Conference_Titel

Control 2010, UKACC International Conference on

Conference_Location

Coventry

Electronic_ISBN

978-1-84600-038-6

Type

conf

DOI

10.1049/ic.2010.0291

Filename

6490749