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Magnus Cinthio, MSc, PhD. Photo.

Magnus Cinthio

Senior lecturer

Magnus Cinthio, MSc, PhD. Photo.

Anti-Aliasing method for ultrasonic 2D phase-sensitive motion estimator

Author

  • Michiya Mozumi
  • Ryo Nagaoka
  • Magnus Cinthio
  • Hideyuki Hasegawa

Summary, in English

A 2D motion estimator can estimate tissue motions and blood flow dynamics more accurately than a 1D motion estimator. In this study, we proposed a simple anti-Aliasing filter to unwrap the phase of the cross spectrum. The proposed method is evaluated by simulation mimicking steady flows, and the magnitude of the true velocity was changed from 200 to 2400 mm s-1. In the simulation, bias error was improved from 295.0% to 4.9% by the proposed method at a true velocity magnitude of 1600 mm s-1. Also, in the in vivo measurement of the left ventricle, the wrapping in the phase of the cross spectrum was corrected by the proposed method, and the directions of the blood velocity vectors were estimated more accurately.

Department/s

  • Department of Biomedical Engineering

Publishing year

2020

Language

English

Publication/Series

Japanese Journal of Applied Physics

Volume

59

Issue

SK

Document type

Journal article

Publisher

IOP Publishing

Topic

  • Medical Image Processing

Status

Published

ISBN/ISSN/Other

  • ISSN: 0021-4922