Search Results for author: Shreyas S. Vasanawala

Found 14 papers, 6 papers with code

AutoSamp: Autoencoding MRI Sampling via Variational Information Maximization

2 code implementations5 Jun 2023 Cagan Alkan, Morteza Mardani, Shreyas S. Vasanawala, John M. Pauly

Experiments on public MRI datasets show improved reconstruction quality of the proposed AutoSamp method over the prevailing variable density and variable density Poisson disc sampling.

Anatomy

Artifact- and content-specific quality assessment for MRI with image rulers

no code implementations6 Nov 2021 Ke Lei, John M. Pauly, Shreyas S. Vasanawala

We propose a framework with multi-task CNN model trained with calibrated labels and inferenced with image rulers.

Image Quality Assessment

Accelerating cardiac cine MRI using a deep learning-based ESPIRiT reconstruction

no code implementations13 Nov 2019 Christopher M. Sandino, Peng Lai, Shreyas S. Vasanawala, Joseph Y. Cheng

Feasibility of this approach is demonstrated in reconstructions of prospectively undersampled data which were acquired in a single heartbeat per slice.

Image Reconstruction

Wasserstein GANs for MR Imaging: from Paired to Unpaired Training

no code implementations15 Oct 2019 Ke Lei, Morteza Mardani, John M. Pauly, Shreyas S. Vasanawala

The reconstruction networks consist of a generator which suppresses the input image artifacts, and a discriminator using a pool of (unpaired) labels to adjust the reconstruction quality.

Image Reconstruction

Extreme MRI: Large-Scale Volumetric Dynamic Imaging from Continuous Non-Gated Acquisitions

1 code implementation30 Sep 2019 Frank Ong, Xucheng Zhu, Joseph Y. Cheng, Kevin M. Johnson, Peder E. Z. Larson, Shreyas S. Vasanawala, Michael Lustig

We demonstrate the feasibility of the proposed method on DCE imaging acquired with a golden-angle ordered 3D cones trajectory and pulmonary imaging acquired with a bit-reversed ordered 3D radial trajectory.

Medical Physics Image and Video Processing

Deep Residual Network for Off-Resonance Artifact Correction with Application to Pediatric Body Magnetic Resonance Angiography with 3D Cones

no code implementations28 Sep 2018 David Y Zeng, Jamil Shaikh, Dwight G. Nishimura, Shreyas S. Vasanawala, Joseph Y. Cheng

Long-readout scans, with greater off-resonance artifacts but shorter scan time, were corrected by autofocus and Off-ResNet and compared to short-readout scans by normalized root-mean-square error (NRMSE), structural similarity index (SSIM), and peak signal-to-noise ratio (PSNR).

SSIM

Clinically Deployed Distributed Magnetic Resonance Imaging Reconstruction: Application to Pediatric Knee Imaging

no code implementations11 Sep 2018 Michael J. Anderson, Jonathan I. Tamir, Javier S. Turek, Marcus T. Alley, Theodore L. Willke, Shreyas S. Vasanawala, Michael Lustig

Our improvements to the pipeline on a single machine provide a 3x overall reconstruction speedup, which allowed us to add algorithmic changes improving image quality.

Highly Scalable Image Reconstruction using Deep Neural Networks with Bandpass Filtering

1 code implementation8 May 2018 Joseph Y. Cheng, Feiyu Chen, Marcus T. Alley, John M. Pauly, Shreyas S. Vasanawala

To increase the flexibility and scalability of deep neural networks for image reconstruction, a framework is proposed based on bandpass filtering.

Image Reconstruction

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