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with Parallel imaging as keyword

Fisher Information and Cramér-Rao Lower Bound for Experimental Design in Parallel Imaging

Published in Magnetic resonance in medicine

Purpose The Cramér-Rao lower bound (CRLB) is widely used in the design of magnetic resonance experiments for parameter estimation. Previous work has considered only Gaussian or Rician noise distributions in this calculation. However, the noise distribution for multiple-coil acquisitions, such as in parallel imaging, obeys the noncentral χ-distribut...

Comparison of 3T and 7T ASL techniques for concurrent functional perfusion and BOLD studies.

Published in NeuroImage

Arterial spin labeling (ASL) is the primary non-invasive MRI approach to measure baseline cerebral blood flow (CBF) in healthy subjects and patients. ASL also allows concurrent functional BOLD signal and CBF measurements, but the latter typically suffer from low contrast-to-noise (CNR) ratio. Ultra-high-field imaging significantly boosts BOLD signa...

Recent advances in parallel imaging for MRI.

Published in Progress in nuclear magnetic resonance spectroscopy

Magnetic Resonance Imaging (MRI) is an essential technology in modern medicine. However, one of its main drawbacks is the long scan time needed to localize the MR signal in space to generate an image. This review article summarizes some basic principles and recent developments in parallel imaging, a class of image reconstruction techniques for shor...

Trimmed autocalibrating k-space estimation based on structured matrix completion

PURPOSE: Parallel imaging allows the reconstruction of undersampled data from multiple coils. This provides a means to reject and regenerate corrupt data (e.g. from motion artefact). The purpose of this work is to approach this problem using the SAKE parallel imaging method. THEORY AND METHODS: Parallel imaging methods typically require calibration...

Three-dimensional black-blood T2 mapping with compressed sensing and data-driven parallel imaging in the carotid artery....

Published in Magnetic resonance imaging

This study demonstrates the feasibility of combining CS and PI for accelerating 3D T2 mapping in the carotid artery, with accurate T2 measurements and good repeatability.

Accelerating MRI fat quantification using a signal model-based dictionary to assess gastric fat volume and distribution ...

Published in Magnetic resonance imaging

To quantify intragastric fat volume and distribution with accelerated magnetic resonance (MR) imaging using signal model-based dictionaries (DICT) in comparison to conventional parallel imaging (CG-SENSE). This study was approved by the local ethics committee and written informed consent was obtained. Seven healthy subjects were imaged after intake...

O-space with high resolution readouts outperforms radial imaging.

Published in Magnetic resonance imaging

High resolution O-Space imaging yields highly undersampled images of high resolution and minimal artifacts. The additional nonlinear gradient field improves image quality beyond conventional radial imaging.