MEASUREMENTS OF MAGNETIC-FIELD VARIATIONS IN THE HUMAN BRAIN USING A 3D-FT MULTIPLE GRADIENT-ECHO TECHNIQUE

被引:35
作者
ERICSSON, A
WEIS, J
HEMMINGSSON, A
WIKSTROM, M
SPERBER, GO
机构
[1] UNIV UPPSALA HOSP,DEPT DIAGNOST RADIOL,MRT SECT,S-75185 UPPSALA,SWEDEN
[2] SLOVAK ACAD SCI,INST MEASUREMENT SCI,BRATISLAVA,SLOVAKIA
[3] UPPSALA UNIV,CTR BIOMED,DEPT PHYSIOL & MED BIOPHYS,UPPSALA,SWEDEN
关键词
MAGNETIC FIELD MEASUREMENT; MAGNETIC RESONANCE SPECTROSCOPIC IMAGING; MAGNETIC SUSCEPTIBILITY; INTRACEREBRAL HEMATOMA;
D O I
10.1002/mrm.1910330205
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
A magnetic resonance 3DFT multiple gradient-echo technique was used for measurements of the proton spectrum for each voxel in the measured slice. Water, fat, magnetic field and T-2* distributions in the head of a normal volunteer and a patient with intracerebral hematoma were computed. Magnetic field variations caused by the head were calculated after correction for the static magnetic field inhomogeneity. Large local magnetic field variations up to 3 ppm were found in the human brain near interfaces between air or bone and brain tissues and 0.5 ppm between hematoma and brain tissue. Information about magnetic field variations could be useful for shimming procedures in vivo and for correcting artifacts in imaging and spectroscopy.
引用
收藏
页码:171 / 177
页数:7
相关论文
共 32 条