Title :
Variations in T1 and T2 due to MRI contrast agents: effect on image contrast
Author :
Rao, Navalgund A H K
Author_Institution :
Center for Imaging Sci., Rochester Inst. of Technol., NY, USA
Abstract :
A model for studying the effect of T1 and T2 variations during image acquisition for a spin-echo pulse sequence is described. The method is based on the understanding that the free induction decay (FID) measurements in magnetic resonance imaging (MRI) are samples of the 2-D Fourier space along k→ trajectories, determined by the gradient fields. Using experimental T1 and T2 data for a contrast agent in rat livers and liver tumors, the effect of temporal variations of T1 and T2 on the final image contrast is illustrated for standard spin-echo imaging pulse sequences
Keywords :
biomedical NMR; nuclear spin-lattice relaxation; patient diagnosis; spin-spin relaxation; 2D Fourier space; MRI contrast agents; T1; T2; free induction decay; gradient fields; image acquisition; image contrast; liver tumour; magnetic resonance imaging; medical diagnostic imaging; rat liver; spin-echo imaging pulse sequences; Biomedical imaging; Data acquisition; Encoding; Engineering in medicine and biology; Equations; Liver neoplasms; Magnetic resonance imaging; Pulse measurements; Sequences; Tellurium;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95994
