基于红外摄像装置的Triniti呼吸门控系统的设计和性能验证  

Design and Performance Verification of Triniti Respiratory Gating System Based on Infrared Camera Device

作　　者：刘颖[1] 王鑫[1] 徐瑶瑶 袁玲 潘宇龙 LIU Ying;WANG Xin;XU Yaoyao;YUAN Ling;PAN Yulong(Department of Radiotherapy,The Fifth Affiliated Hospital of Guangzhou Medical University,Guangzhou Guangdong 510000,China)

机构地区：[1]广州医科大学附属第五医院放疗科,广东广州510000

出　　处：《中国医疗设备》2024年第4期35-40,共6页China Medical Devices

基　　金：广州市科技计划项目(202206010154)。

摘　　要：目的通过分析红外摄像装置Triniti呼吸门控系统和腹压带方式下采集的呼吸运动波形及4DCT影像一致性,验证Triniti呼吸门控系统的临床可行性。方法利用CIRS 18023-A呼吸运动模体及配套的CIRS Motion Control软件,导入仿真标准呼吸运动及真实患者的呼吸运动曲线,模拟人体肺部呼吸运动的周期、幅度、频率等,产生不同的呼吸运动模型,并分别用基于腹压带和Triniti呼吸门控系统2种呼吸运动信号触发CT扫描,分析2种装置触发下的4DCT影像一致性,最后根据Triniti系统追踪的呼吸运动,设置门控范围,实现门控治疗。结果2种呼吸运动信号探测装置采集到的呼吸运动波形曲线相关性>0.8(P<0.001),4DCT影像各时相感兴趣区域测量度差异性值为(0.065±0.069)cm,差异无统计学意义(P>0.05)。结论基于红外摄像装置的Triniti呼吸门控系统追踪呼吸精度高,可实现临床呼吸门控治疗,从而有效减少呼吸运动对放射治疗造成的影响。Objective To verify the clinical feasibility of the Triniti respiratory gating system by analyzing the respiratory motion waveform and 4DCT image consistency collected under the Triniti respiratory gating system and abdominal pressure belt.Methods The CIRS 18023-A respiratory motion model and supporting CIRS Motion Control software were used,the simulated standard respiratory movement and the respiratory movement curve of real patients were imported to simulate the cycle,amplitude and frequency of respiratory movement in human respiratory movement,and the different respiratory movement models were generated,and CT scans were triggered by two respiratory movement signals based on abdominal pressure belt and Triniti respiratory gating system,and the consistency of 4DCT triggered by the two devices was analyzed.Finally,according to the respiratory movement tracked by the Triniti system,the gating range was set to achieve gating treatment.Results The correlation of respiratory movement waveform curves collected by the two respiratory movement signal detection devices was more than 0.8(P<0.001),and the measurement difference of the region of interest in each phase of the 4DCT image was(0.065±0.069)cm,with no statistical significance(P>0.05).Conclusion The Triniti respiratory gating system based on infrared camera device can track respiration with high precision and realize clinical respiratory gating treatment,thus effectively reduce the impact of respiratory movement on radiotherapy.

关 键 词：红外摄像原理 呼吸门控 4DCT 系统设计 门控延迟测量 

分 类 号：R197.39[医药卫生—卫生事业管理]