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Analysis of Automatic Rigid Image-Registration on Tomotherapy  

Kim, Young-Lock (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Cho, Kwang Hwan (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Jung, Jae-Hong (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Jung, Joo-Young (Dept. of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, The Catholic University of Korea)
Lim, Kwang Chae (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Kim, Yong Ho (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Moon, Seong Kwon (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Bae, Sun Hyun (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Min, Chul Kee (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Kim, Eun Seog (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Yeo, Seung-Gu (Dept. of Radiation Oncology, College of Medicine, Soonchunhyang University of Korea)
Suh, Tae Suk (Dept. of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, The Catholic University of Korea)
Choe, Bo-Young (Dept. of Biomedical Engineering and Research Institute of Biomedical Engineering, College of Medicine, The Catholic University of Korea)
Min, Jung-Whan (Dept. of Radiology, Shin-Gu University of Korea)
Ahn, Jae Ouk (Dept. of Medical Information Technology Engineering, Soonchunhyang University of Korea)
Publication Information
Journal of radiological science and technology / v.37, no.1, 2014 , pp. 37-47 More about this Journal
Abstract
The purpose of this study was to analyze translational and rotational adjustments during automatic rigid image-registration by using different control parameters for a total of five groups on TomoTherapy (Accuray Inc, Sunnyvale, CA, USA). We selected a total of 50 patients and classified them in five groups (brain, head-and-neck, lung, abdomen and pelvic) and used a total of 500 megavoltage computed tomography (MVCT) image sets for the analysis. From this we calculated the overall mean value(M) for systematic and random errors after applying the different control parameters. After randomization of the patients into the five groups, we found that the overall mean value varied according to three techniques and resolutions. The deviation for the lung, abdomen and pelvic groups was approximately greater than the deviation for the brain and head-and-neck groups in all adjustments. Overall, using a "full-image" produces smaller deviations in the rotational adjustments. We found that rotational adjustment has deviations with distinctly different control parameters. We concluded that using a combination of the "full-image" technique and "standard" resolution will be helpful in assisting with patients' repositioning and in correcting for set-up errors prior to radiotherapy on TomoTherapy.
Keywords
Tomotherapy; Image guided radiation therapy; Megavoltage computed tomography; Image-registration;
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