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KMID : 0357520100330040379
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Journal of Radiological Science and Technology
2010 Volume.33 No. 4 p.379 ~ p.386
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Evaluation on the Usefulness of Lung Tumor Stereotactic Radiosurgery Applying the CyberKnife Respiratory Tracking System
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Kim Gha-Jung
Bae Seok-Hwan
Choi Jun-Gu
Chae Hong-In
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Abstract
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This study evaluated the motion of tumors during the entire period of therapy and the accuracy of radiosurgery among forty eight lung tumor patients who were underwent radiosurgery using the CyberKnife Synchrony Respiratory Tracking System. The motion of lung tumor was measured by the coordinates of a gold acupuncture needle inserted into the tumor or the area around the tumor using the CyberKnife image guided system. Then the accuracy of radiosurgery was evaluated based on the error of correlation computed with the motion tracking system. The lung tumor motion is Cranio-Caudal direction by an average of , moved left-right direction by , and anterior-posterior direction by . The degree of rotational movement was on X axis, on Y axis, and on Z axis. The vector of translation movement was measured to be on the average. The results show that directions of Cranio-Caudal(p < 0.001), anterior-posterior direction(p < 0.029), and three dimensional vector value(p < 0.002) showed statistical significance, because the lower side of tumor showed more intensive movement compared to the upper side of tumor. The radiosurgery was carried out by compensating the motion of tumor after accurate investigation of the correlation error with the average of during the lung tumor radiosurgery with the CyberKnife Synchrony Respiratory Tracking System.
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KEYWORD
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CyberKnife Radiosurgery, Synchrony Respiratory Tracking System, Lung tumor
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