CUED Publications database

Real-time block flow tracking of atrial septal defect motion in 4D cardiac ultrasound

Linguraru, MG and Kabla, A and Vasilyev, NV and Del Nido, PJ and Howe, RD (2007) Real-time block flow tracking of atrial septal defect motion in 4D cardiac ultrasound. 2007 4th IEEE International Symposium on Biomedical Imaging: From Nano to Macro - Proceedings. pp. 356-359.

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Abstract

Real-time cardiac ultrasound allows monitoring the heart motion during intracardiac beating heart procedures. Our application assists atrial septal defect (ASD) closure techniques using real-time 3D ultrasound guidance. One major image processing challenge is the processing of information at high frame rate. We present an optimized block flow technique, which combines the probability-based velocity computation for an entire block with template matching. We propose adapted similarity constraints both from frame to frame, to conserve energy, and globally, to minimize errors. We show tracking results on eight in-vivo 4D datasets acquired from porcine beating-heart procedures. Computing velocity at the block level with an optimized scheme, our technique tracks ASD motion at 41 frames/s. We analyze the errors of motion estimation and retrieve the cardiac cycle in ungated images. © 2007 IEEE.

Item Type: Article
Uncontrolled Keywords: 3D echocardiography Atrial septal defect Block flow Motion tracking Real-time
Subjects: UNSPECIFIED
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:51
Last Modified: 08 Dec 2014 02:38
DOI: 10.1109/ISBI.2007.356862