摘要
Abstract
Objective To analyse all the six-dimensional orientation data generated from all the exposure points of 30 cases patients tracked by Cyber Knife Xsighl. Methods Thirty cases tracked by Cyber Knife Xsight were selected randomly, fixed on CT-SIM location, and were treated by G3 Cyber Knife. A total of 1358 exposure point images were collected, from which 1358 teams of six-dimensional orientation dala that needed to be calibrated by the robot arm were gotten, including the images of 337 exposure points when the patients were out of the calibrated range of Cyber Knife robot arm. The means and standard deviations of all the directions were compared. Results The six-dimensional orientations were including left and right translation LET (+) / RIG (-), forward and backward translation ANT (+) / POS (-), head and feet translation NIF (+) / SUP (-), left and right rotation R (+) / L (-) (degree), Head-up (+) / Head-up (-) (degree), and anticlockwise and clockwise CCW (+) / CW (-), the maximum value of which was 2.3, 2.0, 1.7, 2.5, 1.6 and 2.1, the minimum one was -2.8, -2.1, -1.2, -2.1, -1.3, and -1.5, the median was -0.4, 0.3, 0.1, 0.6, 0.2 and 0.4, and the changes range was 5.1, 4.1, 2.9, 4.6, 2.9 and 3.6, respectively. Conclusion The patients' movement during die Cyber Knife precision radiation therapy shows a symmetrical characteristic with close amplitude and a median value closed to 0. But the movement range of patients themselves is beyond the requirements that the total error should not be more than 0.95 mm required by Cyber Knife Xsight system, especially the left and right translation LET (+) / RIG (-) and left and right rotation R (+) / L (-) (degree), which fully explains the necessity and importance of the calibration by the robot arm before the beam.关键词
Xsight/六维方向数据/曝光点/机械臂校准/必要性Key words
Xsight/ six-dimensional orientation data/ exposure point/ robot arm calibration/ necessity分类
机械制造
