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Extended-field-of-view three-dimensional transesophageal echocardiography using image-based X-ray probe tracking

Research output: Contribution to journalArticle

R James Housden, Yingliang Ma, Aruna Arujuna, Niels Nijhof, Pascal Cathier, Geert Gijsbers, Roland Bullens, Jaswinder Gill, Christopher Aldo Rinaldi, Victoria Parish, Kawal S Rhode

Original languageEnglish
Pages (from-to)993-1005
Number of pages13
JournalUltrasound in medicine & biology
Issue number6
PublishedJun 2013

Bibliographical note

Copyright © 2013 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.

King's Authors


The use of ultrasound imaging for guidance of cardiac interventional procedures is limited by the small field of view of the ultrasound volume. A larger view can be created by image-based registration of several partially overlapping volumes, but automatic registration is likely to fail unless the registration is initialized close to the volumes' correct alignment. In this article, we use X-ray images to track a transesophageal ultrasound probe and thereby provide initial position information for the registration of the ultrasound volumes. The tracking is possible using multiple X-rays or just a single X-ray for each probe position. We test the method in a phantom experiment and find that with at least 50% overlap, 88% of volume pairs are correctly registered when tracked using three X-rays and 86% when using single X-rays. Excluding failed registrations with errors greater than 10 mm, the average registration accuracy is 2.92 mm between ultrasound volumes and 4.75 mm for locating an ultrasound volume in X-ray space. We conclude that the accuracy and robustness of the registrations are sufficient to provide useful images for interventional guidance.

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