T. Bakir et Sj. Reeves, A filter design method for minimizing ringing in a region of interest in MR spectroscopic images, IEEE MED IM, 19(6), 2000, pp. 585-600
Citations number
14
Categorie Soggetti
Radiology ,Nuclear Medicine & Imaging","Eletrical & Eletronics Engineeing
Magnetic resonance spectroscopic imaging (MRSI) requires a relatively long
time to sample k-space (the spatial frequency domain), effectively lowpass
filtering the resulting reconstructed image. Ringing is especially problema
tic when a region of interest (ROI) is close to a bright region outside the
ROI, since the bright region tends to create a ringing artifact into the R
OI due to the lowpass nature of the data, In this paper, we propose a metho
d that reduces the effect of a stronger signal region on a weaker signal in
a nearby ROI by designing a postprocessing filter that steers the strong i
nterference away from the ROI, The proposed method is computationally simpl
e both in the design stage and in applying it to images. We present experim
ents that illustrate the value of the technique.