CT扫描新型制动垫设计与应用效果评价

Design of new type of brake pad of CT scan and the evaluation of its application

目的:设计一种能限制患者头部移动的新型制动垫,有效减少患者在进行头部CT检查时因头部移动造成的运动伪影。方法:根据患者头部结构特点设计一种新型制动垫,由充气式横围带和充气式纵箍带组成。患者在进行CT检查时,平卧于检查床上,用处于膨胀状态的充气式横围带和充气式纵箍带将患者头部与CT扫描床上的枕架之间的间隙填满。随机选取在医院进行CT检查的意识昏迷及自控能力差等病情特殊的90例患者,按照是否使用新型制动垫将其分为观察组和对照组,每组45例,对两组因头部移动产生运动伪影情况进行比较和分析,评价新型制动垫临床应用效果。结果:观察组患者使用新型制动垫后,头部移动未产生运动伪影为43例(占95.5%),而对照组未产生运动伪影为24例(占53.3%),两组比较差异有统计学意义(x^2=21.084,P<0.001)。新型制动垫能将患者头部与CT扫描床上的枕架之间的间隙填满,软压制动效果明显,可以有效地避免患者检查时头部移动,确保头部CT扫描的图像效果。结论:CT扫描新型制动垫具有结构设计新颖,操作简单方便,临床运用效果明显的特点,能减少因患者头部移动造成的运动伪影,提高CT图像质量,方便临床诊断。

Objective:To design a new type of brake pad that could restrict the head movement of patients so as to effectively reduce the motion artifacts caused by head movement in the head CT examination of patients.Methods:According to the characteristics of the head structure of patients,a new type of brake pad was designed.It was consisted of an inflatable horizontal belt and an inflatable longitudinal belt.Patients were placed on the examination bed while they received CT examination.The gap between the patient's head and the pillow shelf of the CT scanning bed was filled by the inflatable horizontal belt and the inflatable longitudinal belt which were in inflated state.90 patients with conscious coma,poor self-control ability and other special diseases who underwent CT examination in hospital were randomly selected.According to whether they used new brake pad to divide these patients into observation group(45 cases)and control group(45 cases).The motion artifacts that caused by head movement of two groups were compared and analyzed,and the results were used to evaluate the effects of clinical application of the new brake pad.Results:In observation group,43 cases didn’t present motion artifacts which caused by head movement after they used new type of brake pad(95.5%),while 24 cases didn’t present motion artifacts in control group(53.3%).The difference of that between two groups were significant(x^2=21.084,P<0.001).The new brake pad could fill the gap between head of patients and pillow shelf,and the braked effect caused by soft pressure was significant.It could effectively avoid the head movement of patients when they received examination and could ensure image effect of CT scan on head.Conclusion:The new type of brake pad of CT scan has series of characteristics includes novel design on structure,simple and convenient operation,and obvious clinical application effect.It can reduce motion artifacts caused by the head movement of patients,and improve the quality of CT images,and facilitate clinical diagnosis.