Low-frequency restoration.
In magnetic resonance imaging, if the object of interest is known to be spatially bounded within the image field-of-view, then the high-intensity, low spatial frequencies can be determined by postprocessing. This allows the system receiver gain to be increased, thereby decreasing the quantitation noise from the analog-to-digital converters. No imaging sequence modifications are required.
Magnetic Resonance Systems Research Laboratory, Stanford University, California 94305.
J
J
Jackson
A
A
Macovski
D
D
Nishimura
D000818:Animals; D008279:Magnetic Resonance Imaging / Q000379:methods; D008722:Methods; D008962:Models, Theoretical