Smoothly clipped absolute deviation (SCAD) regularization for compressed sensing MRI using an augmented Lagrangian scheme

Mehranian, Abolfazl; Rad, Hamidreza Saligheh; Rahmim, Arman; Ay, Mohammad Reza; Zaidi, Habib

doi:10.1016/j.mri.2013.05.010

Scientific article

English

Smoothly clipped absolute deviation (SCAD) regularization for compressed sensing MRI using an augmented Lagrangian scheme

Contributors

Mehranian, Abolfazl; Rad, Hamidreza Saligheh; Rahmim, Arman; Ay, Mohammad Reza; Zaidi, Habib

Published in

Magnetic resonance imaging, vol. 31, no. 8, p. 1399-1411

Publication date

2013

Abstract

Compressed sensing (CS) provides a promising framework for MR image reconstruction from highly undersampled data, thus reducing data acquisition time. In this context, sparsity-promoting regularization techniques exploit the prior knowledge that MR images are sparse or compressible in a given transform domain. In this work, a new regularization technique was introduced by iterative linearization of the non-convex smoothly clipped absolute deviation (SCAD) norm with the aim of reducing the sampling rate even lower than it is required by the conventional l1 norm while approaching an l0 norm.

Keywords

Algorithms
Artifacts
Brain/anatomy & histology
Data Compression/methods
Humans
Image Enhancement/methods
Image Interpretation, Computer-Assisted/methods
Magnetic Resonance Imaging/methods
Numerical Analysis, Computer-Assisted
Reproducibility of Results
Sample Size
Sensitivity and Specificity

UNIGE affiliation entities

Faculté de médecine / Section de médecine clinique / Département de radiologie et informatique médicale

UNIGE research groups

Imagerie Médicale (TEP et TEMP) (542)

Funding

Swiss National Science Foundation - Towards motion compensated direct 4D parametric whole-body PET imaging [149957]

Citation (ISO format)

MEHRANIAN, Abolfazl et al. Smoothly clipped absolute deviation (SCAD) regularization for compressed sensing MRI using an augmented Lagrangian scheme. In: Magnetic resonance imaging, 2013, vol. 31, n° 8, p. 1399–1411. doi: 10.1016/j.mri.2013.05.010

Article (Published version)

Identifiers

PID : unige:40169
DOI : 10.1016/j.mri.2013.05.010
PMID : 23891179

Journal ISSN

0730-725X

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15/11/2024 15:43:39

Smoothly clipped absolute deviation (SCAD) regularization for compressed sensing MRI using an augmented Lagrangian scheme

Contributors

Published in

Publication date

Abstract

Keywords

UNIGE affiliation entities

UNIGE research groups

Funding

Citation (ISO format)

Main files (1)

Identifiers

Journal ISSN

Technical informations

Creation

First validation

Update

Status update

Last indexation