Mechanical Accuracy of a Stereotactic Irradiation System Using a Micro Multi-leaf Collimator
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- Tatsumi Daisaku
- Department of Radiology, Osaka City University Hospital
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- Nakada Ryosei
- Department of Radiology, Osaka City University Hospital
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- Tsutsumi Shinichi
- Department of Radiology, Osaka City University Graduate School of Medicine
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- Sakamoto Mariko
- Department of Radiology, Osaka City University Hospital
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- Inoue Makoto
- Department of Radiology, Osaka City University Hospital
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- Ichida Takao
- Department of Radiology, Osaka City University Hospital
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- Hosono Masako
- Department of Radiology, Osaka City University Graduate School of Medicine
Bibliographic Information
- Other Title
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- マイクロマルチリーフコリメータを用いた定位放射線照射システムの機械的精度評価
- マイクロマルチリーフコリメータ オ モチイタ テイイ ホウシャセン ショウシャ システム ノ キカイテキ セイド ヒョウカ
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Description
Mechanical accuracy of a stereotactic irradiation system using a micro multi-leaf collimator (mMLC), Elekta DMLC, has been evaluated. Measurements were made to obtain transmission, leakage, penumbra, and positioning accuracy of the DMLC leaf for a 6 MV photon beam. Mechanical accuracy and long term stability of a linac isocenter was also evaluated. The resulting transmission, along a line perpendicular to the leaf movement, was 0.31±0.01%, and the leakage from the closed opposing leaf pairs was 0.39±0.01%. The measured penumbra, at a depth incurring maximum dose, was 2.37±0.16 mm toward the leaf end and 2.14±0.18 mm toward the leaf side for various field sizes. The leaf gap width error, of 0.10±0.08 mm, was obtained by analyzing picket fence test results. The maximum leaf positioning error, of 0.14±0.06 mm, was obtained by analyzing the log file for a various gantry angles during an arc delivery. The isocenter accuracy was within a radius of 1 mm, without any recalibration for two years. In conclusion, our stereotactic irradiation system using DMLC was capable of providing accurate stereotactic treatment.
Journal
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- Japanese Journal of Radiological Technology
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Japanese Journal of Radiological Technology 67 (10), 1267-1274, 2011
Japanese Society of Radiological Technology
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Details 詳細情報について
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- CRID
- 1390001206362153600
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- NII Article ID
- 10030042119
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- NII Book ID
- AN00197784
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- COI
- 1:STN:280:DC%2BC3MbktVejtA%3D%3D
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- ISSN
- 18814883
- 03694305
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- NDL BIB ID
- 023245794
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- PubMed
- 22026979
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- Abstract License Flag
- Disallowed