Inproceedings: an article in a conference proceedings.
Fast Bias Field Correction for 9.4 Tesla Magnetic Resonance Imaging
Title of the conference
EUSIPCO 2008, 16th European Signal Processing Conference
Lausanne, Switzerland, August 25-28, 2008
In this paper the problem of intensity inhomogeneity athigh magnetic field on magnetic resonance images isaddressed. Specifically, rat brain images at 9.4Tacquired with a surface coil are bias corrected. Wepropose a low- pass frequency model that takes intoaccount not only background-object contours but alsoother important contours inside the image. Twopre-processing filters are proposed: first, to create avolume of interest without contours, and second, toextrapolate the image values of such masked area to thewhole image. Results are assessed quantitatively andvisually in comparison to standard low pass filterapproach, and they show as expected better accuracy inenhancing image intensity.
LTS5, Magnetic Resonance Imaging, Inhomogenity correction, Bias field, High Magnetic field, Animal imaging
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