Abstract：Objective To design a respiratory curve detecting system for RT (Radiotherapy) based on the technology of magnetic positioning, which was intended for real-time detection of the patients’ respiratory curve, controlling the three-dimensional inverse kinematics of RT beds for offsetting the respiratory-factor-caused location changes of the target area and could realize the relatively static status of the target. Methods The magneto-resistive sensors was used to detect magnetic field signal of small magnet which had been pasted on the surface of the patient’s chest. Then, location changes could be obtained through the signal processing and conversion. Finally, a PC software (LabVIEW) was deployed real-timely to display the patients’respiratory curve. Results The system realized the real-time display and data storage of small magnet position movement and the patients’respiratory curve. Conclusion The experimental results showed that this magnetic-positioning-based system could real-timely and accurately acquire the patients’respiratory curve, which provided a new method for acquisition of the patients’ respiratory curve in thoracic-abdominal dynamic RT.
王旋，敦煌俊秋，汤福南，张可，吴小玲. 基于磁定位技术的放疗呼吸曲线检测系统的设计与应用[J]. 中国医疗设备, 2015, 30(6): 42-45.
WANG Xuan, DUN HUANG Jun-qiu, TANG Fu-nan, ZHANG Ke, WU Xiao-ling. Design and Application of a Respiratory Curve Detecting System for RT Based on Magnetic Positioning Technology. China Medical Devices, 2015, 30(6): 42-45.
Yu CX,Jaffray DA,Wong JW.The effects of intra-fraction organ motion on the delivery of dynamic intensity modulation[J].Phys Med Biol,1998,43(1):91-104.
