Search Results for author: Md Ashikuzzaman

Found 7 papers, 0 papers with code

Exploiting Mechanics-Based Priors for Lateral Displacement Estimation in Ultrasound Elastography

no code implementations31 May 2023 Md Ashikuzzaman, Ali K. Z. Tehrani, Hassan Rivaz

This paper proposes exploiting the effective Poisson's ratio (EPR)-based mechanical correspondence between the axial and lateral strains along with the RF data fidelity and displacement continuity to improve the lateral displacement and strain estimation accuracies.

Lateral Strain Imaging using Self-supervised and Physically Inspired Constraints in Unsupervised Regularized Elastography

no code implementations16 Dec 2022 Ali K. Z. Tehrani, Md Ashikuzzaman, Hassan Rivaz

Many modifications have been proposed to improve the displacement estimation of CNNs for USE in the axial direction.

Analytic Optimization-Based Microbubble Tracking in Ultrasound Super-Resolution Microscopy

no code implementations21 Sep 2022 Md Ashikuzzaman, Brandon Helfield, Hassan Rivaz

Ultrasound localization microscopy (ULM) refers to a promising medical imaging modality that systematically leverages the advantages of contrast-enhanced ultrasound (CEUS) to surpass the diffraction barrier and delineate the microvascular map.

Position Super-Resolution

Incorporating Gradient Similarity for Robust Time Delay Estimation in Ultrasound Elastography

no code implementations30 Mar 2022 Md Ashikuzzaman, Timothy J. Hall, Hassan Rivaz

The data term associated with the existing techniques takes only the amplitude similarity into account and hence is not sufficiently robust to the outlier samples present in the RF frames under consideration.

Ultrasound Strain Imaging using ADMM

no code implementations12 Jan 2022 Md Ashikuzzaman, Hassan Rivaz

ADMM empowers the proposed algorithm to use different techniques for optimizing different parts of the cost function and obtain high-contrast strain images with smooth background and sharp boundaries.

Second-Order Ultrasound Elastography with L1-norm Spatial Regularization

no code implementations6 Jan 2022 Md Ashikuzzaman, Hassan Rivaz

To resolve these issues, herein, we propose a novel TDE algorithm where instead of L2-, L1-norms of both first- and second-order displacement derivatives are taken into account to devise the continuity functional.

Time Series Analysis

Fast and Robust Localization of Surgical Array using Kalman Filter

no code implementations22 Dec 2020 Md Ashikuzzaman, Noushin Jafarpisheh, Sunil Rottoo, Pierre Brisson, Hassan Rivaz

This paper introduces a fast and computationally efficient implementation of linear KF to improve the measurement accuracy of an optical tracking system with high temporal resolution.

Robotics

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