Paper Abstract and Keywords |
Presentation |
2013-11-07 10:00
Development of automated estimation of four-dimensional dose distributions based on a 2D/3D registration during a high precision radiotherapy Takahiro Nakamoto, Hidetaka Arimura, Katsumasa Nakamura (Kyushu Univ.), Yoshiyuki Shioyama (Saga HIMAT), Asumi Mizoguchi (Kurume Univ. Hospital), Taka-aki Hirose (Kyushu Univ. Hospital), Hiroshi Honda (Kyushu Univ.), Yoshiyuki Umedu, Yasuhiko Nakamura (Kyushu Univ. Hospital), Hideki Hirata (Kyushu Univ.) MI2013-46 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
The purpose of this study was to develop an estimation method of four-dimensional (4D) dose distributions during radiotherapy based on a 2D/3D registration. “Treatment” computed tomography (CT) images were estimated by deforming three-dimensional (3D) planning CT images by using affine transformation matrices so that a two-dimensional (2D) planning portal dose image (PDI) can be similar to a certain time 2D dynamic clinical PDI. The planning PDI was calculated by applying a dose calculation method (convolution algorithm) to a geometry of the planning CT image and a virtual water phantom. The dynamic clinical PDI was estimated from electronic portal imaging device (EPID) dynamic image acquired during a treatment time. The parameters of affine transformation matrices were optimized by a Levenberg-Marquardt (LM) algorithm. Finally, the 4D dose distributions during the treatment time were calculated by applying the dose calculation method to the simulated 4D “treatment” CT images. The proposed method might be useful for assessment of the outcomes and risk management. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
High precision radiotherapy / CT images / 4D dose distributions / 2D/3D registration / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 113, no. 281, MI2013-46, pp. 5-10, Nov. 2013. |
Paper # |
MI2013-46 |
Date of Issue |
2013-10-31 (MI) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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MI2013-46 |
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