Rectal Content and Intrafractional Prostate Gland Motion Assessed by Magnetic Resonance Imaging
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概要
- 論文の詳細を見る
We evaluated the interrelationship between rectal content and intrafraction motion of the prostate. Forty seven prostate cancer patients instructed to remove their rectal gas were imaged by planning CT and MRI before radiotherapy (RT) and during RT. The total scan time was comparable to our cone-beam CT scanning and treatment times. Rectal content was qualitatively assessed into four different categories by T2-weighted axial MRI: empty (Group E), gas (Group G), combination of gas and feces (Group C), and feces (Group F). Eleven anatomic points of interest (POI) were determined on subsequent sagittal cine-MRI slices. The incidence of displacement of more than 3 mm for more than 10% of time (> 10% time over 3 mm) at least in one of the prostate POIs in Group E was 6.3%, Group G 40.9%, Group C 6.3%, and Group F 0%, respectively. Except for Group G, the mean probability of > 3 mm displacement was < 3%. More than 10% time over 3 mm displacement of the superior prostate in the AP direction (SAP) was noted in only Group G patients and was 45.5% before RT and 18.2% during RT. Only Group G patients were significantly related to both the mean of means and the mean of maxs of prostate displacement of SAP by multivariate analysis. Group G patients were also significantly related to the mean of the standard deviation of rectum width of superior rectum and mid-rectum by multivariate analysis. Patients with rectal gas only were significantly related to prostate displacement and rectal movement.
- Journal of Radiation Research 編集委員会の論文
- 2011-03-16
著者
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MORITA Satoshi
Department of Young Leaders' Program in Health Care Administration, Nagoya University Graduate Schoo
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Inoue Tomio
Department Of Radiology Yokohama City University School Of Medicine
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Suzuki Ryoko
Departments Of Surgery Ii Faculty Of Medicine Kochi University
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Suzuki Ryoko
Department Of Biomolecular Science Faculty Of Science Toho University
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Takebayashi Shigeo
Departments of pathology Fukuoka University School of Medicine
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Morita Satoshi
Department Of Biostatistics And Epidemiology Yokohama City University Medical Center
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KANEKO Tetsuji
Department of Materials Science, Graduate School of Engineering, Tohoku University
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Takebayashi Shigeo
Department Of Pathology Fukuoka University School Of Medicine
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Suzuki Ryoko
Department Of Radiation Oncology Yokohama City University Medical Center
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OGINO Ichiro
Department of Radiation Oncology, Yokohama City University Medical Center
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MATSUI Tonika
Department of Radiation Oncology, Yokohama City University Medical Center
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Inoue Tomio
Department Of Physics Kyushu University
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Ogino Ichiro
Department Of Radiation Oncology Yokohama City University Medical Center
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Ogino Ichiro
Department Of Earth Sciences Saitama University.
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Matsui Tonika
Department Of Radiation Oncology Yokohama City University Medical Center
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Kaneko Tetsuji
Department Of Biostatistics And Epidemiology Yokohama City University Medical Center
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Takebayashi Shigeo
Department Of Radiology Yokohama City University Medical Center
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Inoue Tomio
Department Of Radiology Yokohama City University Hospital
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Inoue Tomio
Department Of Cardiology Kanto-teishin Hospital
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Morita Satoshi
Department Of Biostatistics And Epidemiology Yokohama City University Graduate School Of Medicine
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Kaneko Tetsuji
Department Of Biostatistics And Epidemiology Yokohama City University Graduate School Of Medicine
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MORITA Satoshi
Department of Biostastics and Epidemiology, Yokohama City University Medical Center
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