title: Image reconstruction from phased-array data based on multichannel blind deconvolution.
abstract: In this paper we consider image reconstruction from fully sampled multichannel phased array MRI data without knowledge of the coil sensitivities. To overcome the non-uniformity of the conventional sum-of-square reconstruction, a new framework based on multichannel blind deconvolution (MBD) is developed for joint estimation of the image function and the sensitivity functions in image domain. The proposed approach addresses the non-uniqueness of the MBD problem by exploiting the smoothness of both functions in the image domain through regularization. Results using simulation, phantom and in vivo experiments demonstrate that the reconstructions by the proposed algorithm are more uniform than those by the existing methods.
authors.affiliation: Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112.
authors.forename: Huajun
authors.initials: H
authors.lastname: She
authors.affiliation: Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112.
authors.forename: Rong-Rong
authors.initials: RR
authors.lastname: Chen
authors.affiliation: Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Key Laboratory for MRI, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, P.R. China.
authors.forename: Dong
authors.initials: D
authors.lastname: Liang
authors.affiliation: Neuroimaging Research, Barrow Neurological Institute, Phoenix, AZ 85013.
authors.forename: Yuchou
authors.initials: Y
authors.lastname: Chang
authors.affiliation: Department of Biomedical Engineering, Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260. Electronic address: leiying@buffalo.edu.
authors.forename: Leslie
authors.initials: L
authors.lastname: Ying
mesh_terms: D001921:Brain / Q000033:anatomy & histology*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
keywords: Image restoration; Multichannel blind deconvolution; Non-uniform intensity; Phased array coils; Regularization