Regularized inhomogeneity correction method for phased array image in magnetic resonance imaging
Guo, H.; Pei, X.; Luo, W.; Dai, J.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 28(5): 922
2011
ISSN/ISBN: 1001-5515 PMID: 22097256 Document Number: 651551
Phased array coils (multiple receiver coil systems) have been extensively used for acquisition of MR images owing to their ability of increasing SNR, extending field-of-view (FOV), and reducing acquisition time. But the SOS algorithm,which is main method for phased array image reconstruction,will cause inhomogeneity in reconstructed image. A regularized least square method for phased array image combination is proposed in this paper. In the method, an additional reference scan is performed in advance. By using the reference scan, coil sensitivity map can be acquired, and image reconstructed from reference scan can be used as reference data in the regulation term. Experiments showed that the image uniformity was greatly improved by this method with scanning phantom and volunteer.