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Proceedings Paper

IVUS coronary volume alignment for distinct phases
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Paper Abstract

Image-based intravascular ultrasound (IVUS) cardiac phase detection allows coronary volume reconstruction in different phases. Consecutive volumes are not necessarily spatially aligned due to longitudinal movement of the catheter. Besides ordinary pullback velocity, there is a relative longitudinal movement of the heart vessel walls and the transducer, due to myocardial contraction. In this manuscript, we aim to spatially align cardiac phase coronary IVUS volumes. In addition, we want to investigate this non-linear longitudinal catheter movement. With this purpose, we have analyzed 120 simulated IVUS images and 10 real IVUS pullbacks. We implemented the following methodology. Firstly, we built IVUS volume for each distinct phase. Secondly, each IVUS volume was transformed into a parametric signal of average frame intensity. We have used these signals to make correlation in space with a reference one. Then we estimated the spatial distance between the distinct IVUS volumes and the reference. We have tested in simulated images and real examinations. We have also observed similar pattern in real IVUS examinations. This spatial alignment method is feasible and useful as a step towards dynamic studies of IVUS examination.

Paper Details

Date Published: 14 March 2009
PDF: 7 pages
Proc. SPIE 7265, Medical Imaging 2009: Ultrasonic Imaging and Signal Processing, 72650X (14 March 2009); doi: 10.1117/12.811135
Show Author Affiliations
Monica Mitiko Soares Matsumoto, Heart Institute do Hospital das Clínicas da Faculdade de Medicina Univ. de São Paulo (Brazil)
Pedro Alves Lemos, Heart Institute do Hospital das Clínicas da Faculdade de Medicina Univ. de São Paulo (Brazil)
Sergio Shiguemi Furuie, Heart Institute do Hospital das Clínicas da Faculdade de Medicina Univ. de São Paulo (Brazil)
Univ. de São Paulo (Brazil)


Published in SPIE Proceedings Vol. 7265:
Medical Imaging 2009: Ultrasonic Imaging and Signal Processing
Stephen A. McAleavey; Jan D'hooge, Editor(s)

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