CAJ | 학술논문

目的:探讨在i_Open 0.36T医用磁共振成像(MRI)系统上开发快速获取梯度回波脉冲序列(RAGE)的可行性与实现方法.方法:pascal语言编辑源程序,可调参数控制激发层数,相位编码时序,激发脉冲相位循环,数据采集次数,各段梯度脉冲开关时序等,编排k空间数据记录方式,满足快速傅立叶变换重建需要.编译源程序,调试图像.结果:在256×256采集矩阵的情况下,单层面成像时间最小值4 s,所获图像分辨率、信噪比等指标能满足临床诊断需要.结论:利用该方法设计快速获取梯度回波脉冲序列是可行的.
목적:탐토재i_Open 0.36T의용자공진성상(MRI)계통상개발쾌속획취제도회파맥충서렬(RAGE)적가행성여실현방법.방법:pascal어언편집원정서,가조삼수공제격발층수,상위편마시서,격발맥충상위순배,수거채집차수,각단제도맥충개관시서등,편배k공간수거기록방식,만족쾌속부립협변환중건수요.편역원정서,조시도상.결과:재256×256채집구진적정황하,단층면성상시간최소치4 s,소획도상분변솔、신조비등지표능만족림상진단수요.결론:이용해방법설계쾌속획취제도회파맥충서렬시가행적.
Objective:To implement rapid acquisition gradient echo(RAGE)pulse sequence in clinical MRI scaner.Methods:Pascal language is engaged to edit source code.Number of slice excited,order of phase encoded,phase recycle of RF pulse,NEX,on/off of the gradients,and so on are all controlled by sequence parameters.SI×N_(phase)×N_(slice) data of 32 bctys were allocated to restore the k space.Source code of sequence was compiled with executable file and is loaded to RINMR software.Image of human brain are acquired.The experiment has been conducted on 0.36T permanent MRI system.Resuits:In the case of 256×256 matrix acquisition,time of single slice is 4 seconds.The resolution and SNR of the image are all adquately satisfy the clinical application.