CAJ | 학술논문

以开放式永磁型MRI（magnetic resonance imaging）主磁体为研究对象,将人工的匀场过程与整数线性规划理论相结合,提出了基于中心磁场参照的匀场方法。建立无源匀场数学模型,并采用Lingo软件进行求解,引入数值分析方法计算小磁片阵列的影响值。数值分析及现场匀场实验均验证了该匀场方法可将成像区磁场的均匀度提高近50%。
이개방식영자형MRI（magnetic resonance imaging）주자체위연구대상,장인공적균장과정여정수선성규화이론상결합,제출료기우중심자장삼조적균장방법。건립무원균장수학모형,병채용Lingo연건진행구해,인입수치분석방법계산소자편진렬적영향치。수치분석급현장균장실험균험증료해균장방법가장성상구자장적균균도제고근50%。
A new shimming method, which is used for open permanent main magnet for MRI, referred to the central magnetic field is proposed in this paper. The procedure of practical shimming and theory of integer linear programming are integrated into the method. The shimming mathematic model is built and solved by Lingo. The impact of small shim array is computed by numerical analyze method. The homogeneity of imaging region is eventually advanced nearly by 50% through numerical analyze and shimming experiment.