Search Results for author: Sayantan Bhadra

Found 8 papers, 2 papers with code

Mining the manifolds of deep generative models for multiple data-consistent solutions of ill-posed tomographic imaging problems

1 code implementation10 Feb 2022 Sayantan Bhadra, Umberto Villa, Mark A. Anastasio

In this work, a new empirical sampling method is proposed that computes multiple solutions of a tomographic inverse problem that are consistent with the same acquired measurement data.

Generative Adversarial Network Stochastic Optimization +2

Learning stochastic object models from medical imaging measurements by use of advanced ambient generative adversarial networks

no code implementations27 Jun 2021 Weimin Zhou, Sayantan Bhadra, Frank J. Brooks, Hua Li, Mark A. Anastasio

AmbientGANs established using the proposed training procedure are systematically validated in a controlled way using computer-simulated magnetic resonance imaging (MRI) data corresponding to a stylized imaging system.

Generative Adversarial Network

Advancing the AmbientGAN for learning stochastic object models

no code implementations30 Jan 2021 Weimin Zhou, Sayantan Bhadra, Frank J. Brooks, Jason L. Granstedt, Hua Li, Mark A. Anastasio

Medical imaging systems are commonly assessed and optimized by use of objective-measures of image quality (IQ) that quantify the performance of an observer at specific tasks.

Generative Adversarial Network Object

On hallucinations in tomographic image reconstruction

3 code implementations1 Dec 2020 Sayantan Bhadra, Varun A. Kelkar, Frank J. Brooks, Mark A. Anastasio

The behavior of different reconstruction methods under the proposed formalism is discussed with the help of the numerical studies.

Hallucination Image Reconstruction

Compressible Latent-Space Invertible Networks for Generative Model-Constrained Image Reconstruction

no code implementations5 Jul 2020 Varun A. Kelkar, Sayantan Bhadra, Mark A. Anastasio

To circumvent this problem, in this work, a framework for reconstructing images from incomplete measurements is proposed that is formulated in the latent space of invertible neural network-based generative models.

Image Reconstruction

Learning stochastic object models from medical imaging measurements using Progressively-Growing AmbientGANs

no code implementations29 May 2020 Weimin Zhou, Sayantan Bhadra, Frank J. Brooks, Hua Li, Mark A. Anastasio

To circumvent this, in this work, a new Progressive Growing AmbientGAN (ProAmGAN) strategy is developed for establishing SOMs from medical imaging measurements.

Progressively-Growing AmbientGANs For Learning Stochastic Object Models From Imaging Measurements

no code implementations26 Jan 2020 Weimin Zhou, Sayantan Bhadra, Frank J. Brooks, Hua Li, Mark A. Anastasio

However, because medical imaging systems record imaging measurements that are noisy and indirect representations of object properties, GANs cannot be directly applied to establish stochastic models of objects to-be-imaged.

Object

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