Motion Analysis of Target in Stereotactic Radiotherapy of Lung Tumors Using 320-row Multidetector CT
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- Imae Toshikazu
- Department of Radiology, University of Tokyo Hospital
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- Haga Akihiro
- Department of Radiology, University of Tokyo Hospital
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- Nakagawa Keiichi
- Department of Radiology, University of Tokyo Hospital
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- Ino Kenji
- Department of Radiology, University of Tokyo Hospital
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- Tanaka Kenichirou
- Department of Radiology, University of Tokyo Hospital
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- Okano Yukari
- Department of Radiology, University of Tokyo Hospital
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- Sasaki Katsutake
- Department of Radiology, University of Tokyo Hospital
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- Saegusa Shigeki
- Department of Radiology, University of Tokyo Hospital
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- Shiraki, Takashi
- Department of Radiology, University of Tokyo Hospital
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- Oritate Takashi
- Department of Radiology, University of Tokyo Hospital
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- Yano Keiichi
- Department of Radiology, University of Tokyo Hospital
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- Shinohara Hiroyuki
- Graduate School of Human Health Sciences, Tokyo Metropolitan University
Bibliographic Information
- Other Title
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- ３２０列ＣＴ装置を用いた肺定位放射線治療における標的の軌跡解析
- 320レツ CT ソウチ オ モチイタ ハイ テイイ ホウシャセン チリョウ ニ オケル ヒョウテキ ノ キセキ カイセキ
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Description
Multi-detector computed tomography (MDCT) has rapidly evolved and is increasingly used for treatment simulation of thoracic and abdominal radiotherapy. A 320-detector row CT scanner has recently become available that allows axial volumetric scanning of a 16-cm-long range in a patient without table movement. Current radiotherapy techniques require a generous margin around the presumed gross tumor volume (GTV) to account for uncertainties such as tumor motion and set up error. Motion analysis is useful to evaluate the internal margin of a moving target due to respiration and to improve therapeutic precision. The purpose of this study is to propose a method using phase-only correlation to automatically detect the target and to assess the motion of the target in numerical phantoms and patients. Free-breathing scans using 320-detector row CT were acquired for 4 patients with lung tumor(s). The proposed method was feasible for motion analysis of all numerical phantoms and patients. The results reproduced the facts that the motion of tumors in the patients varied in orbits during the respiratory cycle and exhibited hysteresis. The maximum distance between peak exhalation and inhalation increased as the tumors approached the diaphragm. The proposed method detected the three-dimensional position of the targets automatically and analyzed the trajectories. The tumor motion due to respiration differed by region and was greatest for the lower lobe.
Journal
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- Japanese Journal of Radiological Technology
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Japanese Journal of Radiological Technology 67 (3), 202-211, 2011
Japanese Society of Radiological Technology
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Details 詳細情報について
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- CRID
- 1390282681338724224
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- NII Article ID
- 10027963515
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- NII Book ID
- AN00197784
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- ISSN
- 18814883
- 03694305
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- HANDLE
- 10748/4180
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- NDL BIB ID
- 11055370
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- PubMed
- 21471676
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL Search
- Crossref
- CiNii Articles
- KAKEN
- OpenAIRE
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- Abstract License Flag
- Disallowed
