Diffusion sensitizing imaging method, dynamic imaging method, an

Details Diffusion sensitizing imaging method, dynamic imaging method, an Diffusion sensitizing imaging method, dynamic imaging method, an

1996-04-15

1997-11-04

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01V 300

Patent

active

056844000

ABSTRACT:
An MRI apparatus applies an exciting pulse R1 and a slicing gradient S1 which excites a slice S. Subsequently, it applies a diffusion sensitizing gradient MPG1. Next, it applies a reversing pulse R2 and an FOV limiting gradient RS which limits the data collecting region to have a narrow FOV. Next, it applies a diffusion sensitizing gradient MPG2. Next, it applies a positive and negative reading gradients RA and RB m times alternately and cyclically, and collects MR data from the multiple imaged echoes el.about.em, while applying phase encoding gradients W. The phase encoding gradient W has its amplitude-time product set to be 1/(.gamma..multidot.FOV), where .gamma. is the magnetogyric ratio. The apparatus produces a diffusion sensitized image at a practical spatial resolution, with artifacts attributable to the body movement being alleviated in exchange for a narrow FOV in the phase encoding axis direction.

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