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

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Anti-Aliasing method for ultrasonic 2D phase-sensitive motion estimator. / Mozumi, Michiya; Nagaoka, Ryo; Cinthio, Magnus; Hasegawa, Hideyuki.

I: Japanese Journal of Applied Physics, Vol. 59, Nr. SK, SKKE20, 2020.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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TY - JOUR

T1 - Anti-Aliasing method for ultrasonic 2D phase-sensitive motion estimator

AU - Mozumi, Michiya

AU - Nagaoka, Ryo

AU - Cinthio, Magnus

AU - Hasegawa, Hideyuki

PY - 2020

Y1 - 2020

N2 - 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.

AB - 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.

U2 - 10.35848/1347-4065/ab8c9a

DO - 10.35848/1347-4065/ab8c9a

M3 - Article

VL - 59

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

SN - 0021-4922

IS - SK

M1 - SKKE20

ER -