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Regularization in parallel MR image reconstruction

Parallel MRI has brought forward new applications by reducing the scan time in MR image acquisition. The acceleration is achieved by reducing the number of phase encode steps acquired during the image acquisition thus giving aliased images.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Concepts in Magnetic Resonance Part A

出版时间:2011

ISSN:1546-6086

数据源:报刊文摘

Accelerated cardiac perfusion imaging using k-t SENSE with SENSE training

In k-t sensitivity encoding (SENSE), MR data acquisition performed in parallel by multiple coils is accelerated by sparsely sampling the k-space over time. The resulting aliasing is resolved by exploiting spatiotemporal correlations inherent in dynamic images of natural objects.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Magnetic Resonance in Medicine

出版时间:2009

ISSN:0740-3194

数据源:报刊文摘

An optimised framework for reconstructing and processing MR phase images

Phase contrast imaging holds great potential for in vivo biodistribution studies of paramagnetic molecules and materials. However, in vivo quantification of iron storage and other paramagnetic materials requires improvements in reconstruction and processing of MR complex images.

出版机构:Elsevier Science

刊物名称:NeuroImage

出版时间:2010

ISSN:1053-8119

数据源:报刊文摘

Adaptive non-local means denoising of MR images with spatially varying noise levels

Purpose: To adapt the so-called nonlocal means filter to deal with magnetic resonance (MR) images with spatially varying noise levels (for both Gaussian and Rician distributed noise). Materials and Methods: Most filtering techniques assume an equal noise distribution across the image.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Journal of Magnetic Resonance Imaging

出版时间:2010

ISSN:1053-1807

数据源:报刊文摘

Visualization of active devices and automatic slice repositioning ("SnapTo") for MRI-guided interventions

The accurate visualization of interventional devices is crucial for the safety and effectiveness of MRI-guided interventional procedures. In this paper, we introduce an improvement to the visualization of active devices.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Magnetic Resonance in Medicine

出版时间:2010

ISSN:0740-3194

数据源:报刊文摘

128-channel body MRI with a flexible high-density receiver-coil arrayThis work was presented in part at the 15th Annual Meeting of ISMRM, Berlin, Germany, 2007.

Purpose To determine whether the promise of high-density many-coil MRI receiver arrays for enabling highly accelerated parallel imaging can be realized in practice. Materials and Methods A 128-channel body receiver-coil array and custom MRI system were developed.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Journal of Magnetic Resonance Imaging

出版时间:2008

ISSN:1053-1807

数据源:报刊文摘

Highly k-t-space-accelerated phase-contrast MRIPresented in part at the 15th annual meeting of the ISMRM 2007, Berlin, Germany.

The purpose of this study was to combine a recently introduced spatiotemporal parallel imaging technique, PEAK-GRAPPA (parallel MRI with extended and averaged generalized autocalibrating partially parallel acquisition), with two-dimensional (2D) cine phase-contrast velocity mapping.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Magnetic Resonance in Medicine

出版时间:2008

ISSN:0740-3194

数据源:报刊文摘

k-t-space accelerated myocardial perfusion

Purpose To investigate the performance of the recently introduced spatiotemporal parallel imaging technique called parallel MRI with extended and averaged generalized autocalibrating partially parallel acquisitions (GRAPPA) kernels (PEAK-GRAPPA) for myocardial perfusion measurements.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Journal of Magnetic Resonance Imaging

出版时间:2008

ISSN:1053-1807

数据源:报刊文摘

Virtual coil concept for improved parallel MRI employing conjugate symmetric signals

In addition, the influence of phase variations originating from the complex receiver coils as well as from the background is investigated. It is shown that there exist background phase distributions yielding an optimized pMRI reconstruction. Magn Reson Med 61:93-102, 2009. ? 2008 Wiley-Liss, Inc.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Magnetic Resonance in Medicine

出版时间:2009

ISSN:0740-3194

数据源:报刊文摘

Fully automatic, retrospective enhancement of real-time acquired cardiac cine MR images using image-based navigators and respiratory motion-corrected averaging

Real-time imaging may be clinically important in patients with congestive heart failure, arrhythmias, or in pediatric cases. However, real-time imaging typically has compromised spatial and temporal resolution compared with gated, segmented studies.

出版机构:Wiley Subscription Services, Inc., A Wiley Company

刊物名称:Magnetic Resonance in Medicine

出版时间:2008

ISSN:0740-3194

数据源:报刊文摘