Noise reduction in magnetic resonance imaging.
This paper describes a noise-reduction technique applicable to multiple-measurement systems. This method, known as measurement-dependent filtering (or MDF), can be used to advantage in a number of MRI applications. We present the general theory for one of these applications, material-canceled projection imaging. We discuss and show the results of MDF for material-canceled images as well as for heavily T2-weighted spin-echo images and computed T2 images. Significant improvements in SNR are demonstrated while spatial resolution is preserved.
Brosnan
T
T
Magnetic Resonance Systems Research Laboratory, Stanford University, California 94305.
Wright
G
G
Nishimura
D
D
Cao
Q Z
QZ
Macovski
A
A
Sommer
F G
FG
D004560:Electricity; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008433:Mathematics