CAJ | 학술논문

为实现患者体内金属异物的准确定位及术前术后手术器械的快速排查,设计了基于磁通门梯度测量方式的便携式装置.提出基于剩磁效应的铁磁性金属定位方法和基于电涡流效应的非铁磁性金属定位模式,用以解决传统磁通门无法感应非铁磁性金属的问题.采用改进的跑道型磁芯结构,选择钴基非晶合金Metglas2705M作为磁芯材料,以数字信号处理器为核心进行谐波提取和互相关滤波处理,提高了磁通门性能.通过建立信息数据库使该装置具有一定深度分析能力.15例异物患者临床实验证明,该技术便捷有效,有良好的临床应用前景.
위실현환자체내금속이물적준학정위급술전술후수술기계적쾌속배사,설계료기우자통문제도측량방식적편휴식장치.제출기우잉자효응적철자성금속정위방법화기우전와류효응적비철자성금속정위모식,용이해결전통자통문무법감응비철자성금속적문제.채용개진적포도형자심결구,선택고기비정합금Metglas2705M작위자심재료,이수자신호처리기위핵심진행해파제취화호상관려파처리,제고료자통문성능.통과건립신식수거고사해장치구유일정심도분석능력.15례이물환자림상실험증명,해기술편첩유효,유량호적림상응용전경.
To implement a fast location of metallic foreign body in human body and fast preoperative or postoperative detection of surgical instruments, a portable device based on gradient measurement of fluxgate sensors was designed. Two working modes based on remnant magnetic effect and eddy current effect were proposed for locating two different kinds of metal, thereby solving the problem that nonferromagnetics could not be sensed by fluxgate. Metglas ribbon and modified race-track core were chosen and digital signal processor was utilized to implement harmonic extraction and cross correlation algorithm, which could mean a better fluxgate performance. Database of the depth information was established to provide the ability of analyzing the depth in human body. The locating experiments of 15 foreign body patients has demonstrated the effectiveness of the proposed portable device in clinic applications.