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http://dx.doi.org/10.17946/JRST.2016.39.4.16

Evaluation of Accuracy About 2D vs 3D Real-Time Position Management System Based on Couch Rotation when non-Coplanar Respiratory Gated Radiation Therapy  

Kwon, Kyung-Tae (Department of Radiologic Technology, Dongnam Health University)
Kim, Jung-Soo (Department of Radiologic Technology, Dongnam Health University)
Sim, Hyun-Sun (Department of Radiologic Science, College of Health Sciences, Korea University)
Min, Jung-Whan (Department of Radiological Technology, Shingu University College)
Son, Soon-Yong (Department of Radiotechnology, Wonkwang Health Science University)
Han, Dong-Kyoon (Department of Radiologic Science, College of Health Sciences, EulJi University)
Publication Information
Journal of radiological science and technology / v.39, no.4, 2016 , pp. 601-606 More about this Journal
Abstract
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 $10^{\circ}$ in the 2D gating configuration. In the 3D gating configuration, the couch angle was changed by $10^{\circ}$ in the clockwise direction and compared with the baseline at the reference $0^{\circ}$. The reference amplitude was 1.173 to 1.165, the couch angle at $20^{\circ}$ was 1.132, and the couch angle at $1.0^{\circ}$ was 1.083. At $350^{\circ}$ counterclockwise, the reference amplitude was 1.168 to 1.157, the couch angle at $340^{\circ}$ was 1.124, and the couch angle at $330^{\circ}$ was 1.079. In this study, the phantom is used to quantitatively evaluate the value of the amplitude according to couch change.
Keywords
QA moving phantom; Dot marker; RPM Systems;
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