A NOVEL FAST T1-MAPPING METHOD

被引:37
作者
TONG, CY
PRATO, FS
机构
[1] Department of Nuclear Medicine and Magnetic Resonance, St Joseph's Health Centre, London, Ontario, N6A 4V2
来源
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1994年 / 4卷 / 05期
关键词
BRAIN; MR; FUNCTIONAL IMAGING; IMAGE PROCESSING PERFUSION STUDIES; PULSE SEQUENCES; RAPID IMAGING; RELAXOMETRY;
D O I
10.1002/jmri.1880040513
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
The authors present a novel fast T1-mapping technique that allows a T1 map to be reconstructed from data acquired in less than 3 seconds. Data were acquired by using two modified TurboFLASH (fast low-angle shot) sequences and were processed with a combination of one-dimensional Fourier transforms and a parameter-fitting routine, instead of a standard two-dimensional Fourier transform. Apparent T1 (T1*) maps were obtained, from which T1 maps were calculated. Comparisons of T1 values obtained in phantoms and the human brain by using this technique with those obtained with multipoint inversion-recovery T1 mapping showed that the new method yielded accurate T1 values. Optimization of the method will further improve speed and accuracy. The general approach of this T1-mapping technique is believed to be also applicable to other problems, such as T2 and T2* mapping.
引用
收藏
页码:701 / 708
页数:8
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