Title: Comparison of the sensitivities of two 4DCT techniques: RPM and bellows system

Authors: Kazue Mizuno; Yulin Song; Ceferino Obcemea

Addresses: Department of Nuclear Engineering and Management, The University of Tokyo, Tokyo, Japan. ' Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA. ' Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY, USA

Abstract: In modern radiation therapy, the target motion caused by respiration could result in a geometric miss of the target and severe damage to the surrounding critical organs and normal tissues. To tackle this issue, various 4D Radiation Therapy (4DRT) techniques have recently been proposed and developed, among which the Real-time Position Management System (RPM) and the Bellows system are the most commonly used 4DRT approaches. Nevertheless, a systematic comparison of these two has not been conducted. In this study, we compared the clinical performance of the RPM and the Bellows system by using a newly developed breathing phantom.

Keywords: bellows system; RPM; real-time position management system; IMRT; intensity-modulated radiation therapy; 4DCT; 4DRT; 4D radiation therapy; biomedical engineering; radiotherapy treatment; CT images; medical imaging; computed tomography; breathing phantom; optimum dose distribution; lung tumours; lung cancer; respiratory motion; tumour targeting.

DOI: 10.1504/IJBET.2012.046087

International Journal of Biomedical Engineering and Technology, 2012 Vol.8 No.2/3, pp.220 - 229

Available online: 18 Mar 2012 *

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