Anti-Aliasing method for ultrasonic 2D phase-sensitive motion estimator
(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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https://lup.lub.lu.se/record/e6c77e1a-4368-41db-beb5-d5c1a5629fb7
- author
- Mozumi, Michiya ; Nagaoka, Ryo ; Cinthio, Magnus LU and Hasegawa, Hideyuki LU
- organization
- publishing date
- 2020
- 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
- 2022-04-18 22:48:59
@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}}, }