The effects of different capillary structures on BOLD model in functional MR imaging

Author

Tsai, Chi-Ming ; Chen, Jyh-Horng

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

1994

fDate

3-6 Nov 1994

Firstpage

572

Abstract

Simulation results using the Monte Carlo method to evaluate the MRI signal loss due to intravascular susceptibility difference under different capillary structures are presented in this report. These data reveal a simplified periodic structure which is a good approximation to the complicated random structure when the diffusion constant of water is larger than 10^-9 m²/sec for gradient echo and 2×10^-9 m²/sec for spin echo at a typical cerebral blood volume fraction (f=5%)

Keywords

Monte Carlo methods; biomedical NMR; magnetic susceptibility; physiological models; BOLD model; MRI signal loss; Monte Carlo method; capillary structures effects; functional MR imaging; intravascular susceptibility difference; magnetic resonance imaging; medical diagnostic imaging; water diffusion constant; Blood; Gaussian distribution; Magnetic fields; Magnetic resonance imaging; Magnetization; Monte Carlo methods; Nonuniform electric fields; Paramagnetic materials; Periodic structures; Random number generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE

Conference_Location

Baltimore, MD

Print_ISBN

0-7803-2050-6

Type

conf

DOI

10.1109/IEMBS.1994.411897

Filename

411897