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

Mozumi, Michiya ; Nagaoka, Ryo ; Cinthio, Magnus LU and Hasegawa, Hideyuki LU (2020) In Japanese Journal of Applied Physics 59(SK).
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.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Japanese Journal of Applied Physics
volume
59
issue
SK
article number
SKKE20
publisher
IOP Publishing
external identifiers
  • scopus:85085662707
ISSN
0021-4922
DOI
10.35848/1347-4065/ab8c9a
language
English
LU publication?
yes
id
e6c77e1a-4368-41db-beb5-d5c1a5629fb7
date added to LUP
2020-06-12 12:54:48
date last changed
2020-06-17 05:09:56
@article{e6c77e1a-4368-41db-beb5-d5c1a5629fb7,
  abstract     = {<p>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<sup>-1</sup>. 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<sup>-1</sup>. 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.</p>},
  author       = {Mozumi, Michiya and Nagaoka, Ryo and Cinthio, Magnus and Hasegawa, Hideyuki},
  issn         = {0021-4922},
  language     = {eng},
  number       = {SK},
  publisher    = {IOP Publishing},
  series       = {Japanese Journal of Applied Physics},
  title        = {Anti-Aliasing method for ultrasonic 2D phase-sensitive motion estimator},
  url          = {http://dx.doi.org/10.35848/1347-4065/ab8c9a},
  doi          = {10.35848/1347-4065/ab8c9a},
  volume       = {59},
  year         = {2020},
}