Accelerated Parameter Mapping of Multiple-Echo Gradient-Echo Data Using Model-Based Iterative Reconstruction
| Autor: | Zaheer Abbas, N. Jon Shah, Markus Zimmermann, Krzysztof Dzieciol |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Inverse methods
magnetic resonance imaging (MRI) Iterative method Partial volume Iterative reconstruction SUSCEPTIBILITY Imaging phantom 030218 nuclear medicine & medical imaging Data modeling 03 medical and health sciences 0302 clinical medicine Robustness (computer science) Image Processing Computer-Assisted Humans low rank Hankel matrix model-based iterative reconstruction ALGORITHM Electrical and Electronic Engineering BRAIN FIELD OPTIMIZATION SCLEROSIS Physics WATER-CONTENT Radiological and Ultrasound Technology Phantoms Imaging parameter mapping Magnetic Resonance Imaging Computer Science Applications multiple-echo gradient-echo Compressed sensing Undersampling UNDERSAMPLED DATA Algorithm 030217 neurology & neurosurgery Software Algorithms SYSTEM MRI |
| Zdroj: | Ieee Transactions on Medical Imaging, 37(2), 626-637. IEEE |
| ISSN: | 0278-0062 |
| Popis: | A new reconstruction method, coined MIRAGE, is presented for accurate, fast, and robust parameter mapping of multiple-echo gradient-echo (MEGE) imaging, the basis sequence of novel quantitative magnetic resonance imaging techniques such as water content and susceptibility mapping. Assuming that the temporal signal can be modeled as a sum of damped complex exponentials, MIRAGE performs model-based reconstruction of undersampled data by minimizing the rank of local Hankel matrices. It further incorporates multi-channel information and spatial prior knowledge. Finally, the parameter maps are estimated using nonlinear regression. Simulations and retrospective undersampling of phantom and in vivo data affirm robustness, e.g., to strong inhomogeneity of the static magnetic field and partial volume effects. MIRAGE is compared with a state-of-the-art compressed sensing method, ${{\text {L}}_{1}}$ -ESPIRiT. Parameter maps estimated from reconstructed data using MIRAGE are shown to be accurate, with the mean absolute error reduced by up to 50% for in vivo results. The proposed method has the potential to improve the diagnostic utility of quantitative imaging techniques that rely on MEGE data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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