The influence of radial undersampling schemes on compressed sensing reconstruction in breast MRI

Chan, Rachel W.; Ramsay, Elizabeth; Cheung, Edward; Plewes, Donald B.

doi:10.1002/mrm.23008

Cited by 88 publications

(96 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…45 While it is true that these sampling strategies can provide evenly spaced projections in k-space, they have certain limitations. Both the BR and GA techniques are defined for sampling k-space in two dimensions and the extension to 3D is nontrivial.…”

Section: -7mentioning

confidence: 99%

A comparison of radial keyhole strategies for high spatial and temporal resolution 4D contrast-enhanced MRI in small animal tumor models

et al. 2013

View full text Add to dashboard Cite

Purpose: Dynamic contrast-enhanced (DCE) MRI has been widely used as a quantitative imaging method for monitoring tumor response to therapy. The simultaneous challenges of increasing temporal and spatial resolution in a setting where the signal from the much smaller voxel is weaker have made this MR technique difficult to implement in small-animal imaging. Existing protocols employed in preclinical DCE-MRI acquire a limited number of slices resulting in potentially lost information in the third dimension. This study describes and compares a family of four-dimensional (3D spatial + time), projection acquisition, radial keyhole-sampling strategies that support high spatial and temporal resolution. Methods: The 4D method is based on a RF-spoiled, steady-state, gradient-recalled sequence with minimal echo time. An interleaved 3D radial trajectory with a quasi-uniform distribution of points in k-space was used for sampling temporally resolved datasets. These volumes were reconstructed with three different k-space filters encompassing a range of possible radial keyhole strategies. The effect of k-space filtering on spatial and temporal resolution was studied in a 5 mM CuSO 4 phantom consisting of a meshgrid with 350-μm spacing and in 12 tumors from three cell lines (HT-29, LoVo, MX-1) and a primary mouse sarcoma model (three tumors/group). The time-to-peak signal intensity was used to assess the effect of the reconstruction filters on temporal resolution. As a measure of heterogeneity in the third dimension, the authors analyzed the spatial distribution of the rate of transport (K trans ) of the contrast agent across the endothelium barrier for several different types of tumors. Results: Four-dimensional radial keyhole imaging does not degrade the system spatial resolution. Phantom studies indicate there is a maximum 40% decrease in signal-to-noise ratio as compared to a fully sampled dataset. T1 measurements obtained with the interleaved radial technique do not differ significantly from those made with a conventional Cartesian spin-echo sequence. A bin-by-bin comparison of the distribution of the time-to-peak parameter shows that 4D radial keyhole reconstruction does not cause significant temporal blurring when a temporal resolution of 9.9 s is used for the subsamples of the keyhole data. In vivo studies reveal substantial tumor heterogeneity in the third spatial dimension that may be missed with lower resolution imaging protocols. Conclusions: Volumetric keyhole imaging with projection acquisition provides a means to increase spatiotemporal resolution and coverage over that provided by existing 2D Cartesian protocols. Furthermore, there is no difference in temporal resolution between the higher spatial resolution keyhole reconstruction and the undersampled projection data. The technique allows one to measure complex heterogeneity of kinetic parameters with isotropic, microscopic spatial resolution.

show abstract

Section: -7mentioning

confidence: 99%

A comparison of radial keyhole strategies for high spatial and temporal resolution 4D contrast-enhanced MRI in small animal tumor models

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Compressed sensing (CS) is a recently emerging technique that may significantly accelerate data acquisition [15][16][17][18][19]. It allows images, which are intrinsically sparse in some domains, to be faithfully recovered from insufficient sampling data sets by using a nonlinear reconstruction method [20].…”

Section: Introductionmentioning

confidence: 99%

High temporal resolution dynamic contrast-enhanced MRI using compressed sensing-combined sequence in quantitative renal perfusion measurement

Chen

Zhao

et al. 2015

Magnetic Resonance Imaging

View full text Add to dashboard Cite

“…The images are then reconstructed retrospectively from this data set. This occurs with a freely-selectable temporal resolution while a different number of acquired k-space spokes within one time frame are summarized [36,37]. This concept could lead to a significant simplification of the clinical workflow.…”

mentioning

confidence: 99%

Fast Abdominal Magnetic Resonance Imaging

Budjan

Schoenberg²,

Riffel³

2016

Fortschr Röntgenstr

View full text Add to dashboard Cite

Abdominal imaging is the driving force that necessitates the development of numerous techniques for accelerated image acquisition in magnetic resonance imaging (MRI). Today, numerous techniques are available that enable?rapid, high spatial resolution acquisition for?both T1 and T2 weighted images. These?techniques open new opportunities in the detection and classification of numerous pathologies in the abdomen. However, there is still ongoing progress in the development of fast and ultrafast sequences and promising techniques are currently close to clinical application. With these 4D-technologies, MRI is becoming the central imaging modality for dynamic, motion-compensated imaging of the parenchymal abdominal organs such as liver, pancreas and kidney. Key points: ??Fast imaging techniques are especially valuable in the upper abdomen, as this region is particularly affected by respiratory motion. ??Parallel imaging and k-space-based acceleration techniques are the basic components of fast 3?D sequences. ??By further accelerating 3?D imaging with high spatial resolution, 4?D techniques become available. Citation Format: ??Budjan J., Schoenberg S. O., Riffel P. Fast Abdominal Magnetic Resonance Imaging. Fortschr R?ntgenstr 2016; 188: 551???558

show abstract

The influence of radial undersampling schemes on compressed sensing reconstruction in breast MRI

Cited by 88 publications

References 50 publications

A comparison of radial keyhole strategies for high spatial and temporal resolution 4D contrast-enhanced MRI in small animal tumor models

A comparison of radial keyhole strategies for high spatial and temporal resolution 4D contrast-enhanced MRI in small animal tumor models

High temporal resolution dynamic contrast-enhanced MRI using compressed sensing-combined sequence in quantitative renal perfusion measurement

Fast Abdominal Magnetic Resonance Imaging

Contact Info

Product

Resources

About