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KMID : 1038720130240030191
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Progress in Medical Physics
2013 Volume.24 No. 3 p.191 ~ p.197
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The Development of Real Time Automatic Patient Position Correction System during the Radiation Therapy Based on CCD: A Feasibility Study
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Shin Dong-Ho
Chung Kwang-Zoo
Kim Me-young
Son Jae-Man
Yoon Myong-Geun
Lim Young-Kyung
Lee Se-Byeong
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Abstract
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Upon radiation treatment, it is the important factor to monitor the patient’s motion during radiation irradiated, since it can determine whether the treatment is successful. Thus, we have developed the system in which the patient’s motion is monitored in real time and moving treatment position can be automatically corrected during radiation irradiation. We have developed the patient’s position monitoring system in which the patient’s position is three dimensionally identified by using two CCD cameras which are orthogonal located around the isocenter. This system uses the image pattern matching technique using a normalized cross-correlation method. We have developed the system in which trigger signal for beam on and off is generated by quantitatively analyzing the changes in a treatment position through delivery of the images taken from CCD cameras to the computer and the motor of moving couch can be controlled. This system was able to automatically correct a patient’s position with the resolution of 0.5 mm or less.
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KEYWORD
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3D moving couch, Position correction, Patient positioning, Gating
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