探究焦点到影像板距离同计算机X射线摄影图像质量间的关系  

Explore the Relationship Between the Distance from the Focus to the IP Board and the CR Image Quality

作　　者：滕芳彤 高铭泽 李莲娣 郭玲 于广浩[1] TENG Fang-tong;GAO Ming-ze;LI Lian-di;GUO Ling;YU Guang-hao(Department of Imaging Equipment,School of Medical Imaging,Mudanjiang Medical University,Heilongjiang Mudanjiang 157011;The Second Affiliated Hospital of Mudanjiang Medical University,Heilongjiang Mudanjiang 157009)

机构地区：[1]牡丹江医学院医学影像学院影像设备学教研室,黑龙江牡丹江157011 [2]牡丹江医学院附属第二医院,黑龙江牡丹江157009

出　　处：《中国医疗器械信息》2023年第11期41-43,共3页China Medical Device Information

基　　金：黑龙江省大学生创新创业训练计划项目(项目名称:探究IP(影像板)对肺部X射线图像质量的影响因素,项目编号:202010229019);黑龙江省高等教育教学改革项目(项目名称:“对分课堂”+混合式教学模式在国家级特色专业人才培养中的实践探索,项目编号:SJGY20210916)。

摘　　要：目的:旨在通过探究X射线管焦点(F)到影像板间的最佳距离,分析其于计算机X射线摄影(CR)成像效果间的关系情况。方法:根据几何原理和目前X射线管焦点的放大率,计算得出焦点到影像板间的最小距离;并根据设备参数、投照部位及被照体厚度等参数采用不同的摄影距离,分析此种方式下图像质量情况。结果:依据此方法进行投照的CR图像质量明显上升,X射线曝光量明显降低,尤其以四肢检查的曝光量降低最为显著,同时减小了X射线设备的输出功率。结论:选择合适的焦点到影像板间距离提高了图像质量,减少了患者所受辐射剂量,同时延长了设备的寿命,降低了成本。Objective:The purpose of this study is to explore the optimal distance between the X-ray tube focal point(F)and the IP plate,and analyze its relationship with the computed radio-graphy(CR)imaging effect.Methods:According to the geometric principle and the current X-ray tube focal point magnification,the distance between the smallest focal point and the IP plate is calculated;And different photographing distances are used according to parameters such as equipment parameters,projected parts and object thickness,etc.Analyze the image quality in this way.Results:According to this method,the quality of the CR image projected by this method was significantly improved,and the X-ray exposure was significantly reduced,especially the exposure of the extremity examination was the most significant,and at the same time the output power of the X-ray equipment was reduced.Conclusion:Choosing an appropriate distance between the focus and the IP board improves the image quality,reduces the radiation dose received by the patient,and at the same time extends the life of the equipment and reduces the cost.

关 键 词：X射线摄影 图像质量 影像板 焦点 曝光量 

分 类 号：TH774[机械工程—仪器科学与技术]