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

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
Organisations
External organisations
  • University of Toyama
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Medical Image Processing
Original languageEnglish
Article numberSKKE20
JournalJapanese Journal of Applied Physics
Volume59
Issue numberSK
Publication statusPublished - 2020
Publication categoryResearch
Peer-reviewedYes