Title :
Off-resonance correction of MR images
Author :
Schomberg, Hermann
Author_Institution :
Philips Res. Lab., Hamburg, Germany
fDate :
6/1/1999 12:00:00 AM
Abstract :
In magnetic resonance imaging (MRI), the spatial inhomogeneity of the static magnetic field can cause degraded images if the reconstruction is based on inverse Fourier transformation. This paper presents and discusses a range of fast reconstruction algorithms that attempt to avoid such degradation by taking the field inhomogeneity into account. Some of these algorithms are new, others are modified versions of known algorithms. Speed and accuracy of all these algorithms are demonstrated using spiral MRI.
Keywords :
Fourier transforms; biomedical MRI; image reconstruction; medical image processing; MR images; algorithms; degraded images; fast reconstruction algorithms; inverse Fourier transformation; medical diagnostic imaging; off-resonance correction; simulated phase evolution; spatial inhomogeneity; spiral MRI; static magnetic field; Algorithm design and analysis; Degradation; Fourier transforms; Image generation; Image reconstruction; Magnetic fields; Magnetic resonance imaging; Mathematical model; Reconstruction algorithms; Spirals; Algorithms; Brain; Humans; Image Processing, Computer-Assisted; Magnetic Resonance Imaging; Phantoms, Imaging;
Journal_Title :
Medical Imaging, IEEE Transactions on
