Magnus Cinthio
Senior lecturer
Anti-Aliasing method for ultrasonic 2D phase-sensitive motion estimator
Author
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