【作者】 谢狄霖； 张韬； 林潜；

【Author】 Xie Dilin (The Medical Science Research Institute of Fujian Province 7 Wusi Road,Fuzhou,Fujian,350001) Zhang Tao (The Architecture Design Institute of Fuzhou Develop Zone) Lin Qian (The Envelopment protection & Monitoring Station of Fuzhou City)

【机构】 福建省医学科学研究所； 福州市开发区建筑设计院； 福州市环境保护监测站；

【摘要】 <正>人体内的氢原子核主要来源于细胞中的水,它的核磁共振横向弛豫时间T₂的长短与人体的健康状况密切相关。现有的商品核磁共振仪器多是根据关系式A_t=A_o·e^-t/T₂,采用单指数拟合程序来计算弛豫时间T₂的。但实际更多还原

【Abstract】 The non-negative least squares（NNLS）program was improved using Fortran 77（NDP-77）in micro-computer to perform multi -exponential fitting of the components in NMR relaxation decay curves.The spin-spin relaxation time（T₂）and the content percentage for each component can be calculated.The samples of MnCl₂ solution With different concentration in concentric tubes assembled from 5mm & 10mm diameter tubes were measured and calculated using the multi-exponential fitting algorithm. The error of the calculating result were within +10% for the T₂ components,and Within +15% for the content percentage of each components.更多还原