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KMID : 0357520160390040601
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Journal of Radiological Science and Technology
2016 Volume.39 No. 4 p.601 ~ p.606
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Evaluation of Accuracy About 2D vs 3D Real-Time Position Management System Based on Couch Rotation when non-Coplanar Respiratory Gated Radiation Therapy
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Kwon Kyung-Tae
Kim Jung-Soo
Sim Hyun-Sun
Min Jung-Whan
Son Soon-Yong
Han Dong-Kyoon
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Abstract
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Because of non-coplanar therapy with couch rotation in respiratory gated radiation therapy, the recognition of marker movement due to the change in the distance between the infrared camera and the marker due to the rotation of the couch is called RPM (Real-time The purpose of this paper is to evaluate the accuracy of motion reflections (baseline changes) of 2D gating configuration (two dot marker block) and 3D gating configuration (six dot marker block). The motion was measured by varying the couch angle in the clockwise and counterclockwise directions by 10° in the 2D gating configuration. In the 3D gating configuration, the couch angle was changed by 10° in the clockwise direction and compared with the baseline at the reference 0°. The reference amplitude was 1.173 to 1.165, the couch angle at 20° was 1.132, and the couch angle at 1.0° was 1.083. At 350° counterclockwise, the reference amplitude was 1.168 to 1.157, the couch angle at 340° was 1.124, and the couch angle at 330° was 1.079. In this study, the phantom is used to quantitatively evaluate the
value of the amplitude according to couch change.
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KEYWORD
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QA moving phantom , Dot marker , RPM Systems
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