0% Complete
صفحه اصلی
/
سی امین کنفرانس بین المللی مهندسی برق
Displacement Estimation for Ultrasound Elastography based on a Robust Uniform Stretching Method
نویسندگان :
Zahra Hosseini
1
Ali Khadem
2
Mohammadreza Hassannejad Bibalan
3
1- دانشگاه صنعتی خواجه نصیرالدین طوسی
2- دانشگاه خواجه نصیرالدین طوسی
3- دانشگاه بینالمللی امام خمینی (ره)
کلمات کلیدی :
Elastogram،normalized cross-correlation (NCC)،robust uniform stretching (RUS)،strain،ultrasound elastography.
چکیده :
This paper proposes a novel approach to estimate the displacement fields, which is a common and challenging step in ultrasound elastography. Maximization of normalized cross-correlation (NCC) is one of the literature’s widely used displacement estimation methods. This algorithm is simple to implement and computationally efficient; however, its main drawback is signal decorrelation which is the main source of distortions in elastogram images. In this work, a novel approach to increase the robustness of NCC to signal decorrelation and false peak error is proposed. This technique is according to the stretching-based methods that improve the correlation between pre- and post-compression data. In other words, in this method, the optimum stretching factor producing the highest NCC will be obtained from a two-step algorithm. The first step provides a rough estimation of the stretching factor, and in the second step, the exact value of the stretching parameter will be obtained. Then, the final displacement field is computed by providing a relationship between the stretching factor and the time delay. Finally, the strain image is estimated using the Kalman least square method, ensuring axial and lateral continuity. We call the proposed approach Robust Uniform Stretching (RUS), and its performance is investigated using the simulated and In-vivo data in terms of contrast-to-noise ratio (CNR), signal-to-noise ratio (SNR), and root mean square error (RMSE) criteria. The proposed method had superior performance compared with some conventional window-based algorithms by reaching the highest CNR values of 13.91 and 3.99 and SNR values of 14.50 and 3.61 for the simulation and In-vivo experiments, respectively.
لیست مقالات
لیست مقالات بایگانی شده
Extended Phase Shift Control in Dual Active Bridge Converter Considering Magnetizing Inductance of Transformer
Masood Soleimanifard - Ali Yazdian Varjani
Analysis of the DC Bias Effects on the Transformer Vibration Using a Multi-field Coupling Model
Amir Esmaeili Nezhad - Mohammad Hamed Samimi
ارائه روشی مبتنی بر دایجسترای پویا جهت مسیریابی بهینه در شبکه ترافیک شهری
طه واجدسمیعی - منیره عبدوس
Sum Rate Maximization in STAR-RIS Assisted D2D Communications
Mohammad Reza Kavianinia - Mohammad Javad Emadi
Unsupervised Change Detection in SAR Images Using a Six-Branch CNN and Adaptive Window Approach
Abbas Kakoolvand - Maryam Imani - Hassan Ghassemian
Multi-Agents Gaussian Estimation and Coverage Control Client-Server Architecture
Mohammad َAzizian Shishavan - Mahdi Zeinali - Azam Salari
Application of Transfer Learning in Optimized Filter- Bank Regularized CSP to Classification of EEG Signals with Small Dataset
M. Moein Esfahani - Hossein Sadati
Design and Implementation of a Compact 4×4 Microstrip Patch Antenna Array with Circular Polarization for Nano Satellite Applications
Mohammad Ghasemi - Majid Afsahi - Shoresh Namdari
Second-Order Sliding Mode Design Based on the Integration of Proportional-Integral and Nonlinear $\mathcal{H}_\infty$ Controllers for Load Frequency Control
Behrad Samari - Mohammad Javad Yazdanpanah
Design of Dual-Band Triangular Microstrip Antenna Using Fractal Structure for Wi-Max and Wi-Fi Applications
Arian Mianji - Mohammad Bemani - Saeid Nikmehr - Ahmad Atashpaz Gargari
بیشتر
ثمین همایش، سامانه مدیریت کنفرانس ها و جشنواره ها - نگارش 42.0.4