Patent ID: 6498485
Filing Date: 2002-12-24
Classification: G01R

Abstract:
A method of applying gradient magnetic fields, said method comprising the steps of:applying a static magnetic field to a space holding a subject to be imaged; applying a 90Â° RF pulse to said subject while at the same time applying a first slice gradient in a slice axis direction of said subject; applying a 180Â° RF pulse to said subject while at the same time applying a second slice gradient in said slice axis direction of said subject; and controlling polarity of said first slice gradient and polarity of said second slice gradient to be opposite each other and controlling magnitude and duration of said first slice gradient and said second slice gradient to be similar, whereby said first slice gradient and said second slice gradient restrict field of view to only the slice axis direction and artifacts due to magnetic field ouside of said field of view are prevented from occurring.