Instructions to Prepare the Abstract for the 2nd ORC Conference

First A. Author*, Second B. Author† and Third C. Author‡

*Delft University of Technology,

Mekelweg 4, 2628 CD Delft

The Netherlands

e-mail:

Web page: http://www.ORC2011.nl

ABSTRACT

Contributors of presentations at the conference are invited to submit electronically a 4 pages extended abstract, not later than April 7th, 2013. Contributed papers will be peer-reviewed. Notification of acceptance will be given on July 7th, 2013. Abstracts should briefly outline the main features, results and conclusions as well as their general significance, and contain relevant references.

The abstracts must be translated to Portable Document Format (PDF) before submission through the conference website.

The abstracts will be reproduced as submitted and unchanged in the Book of Abstracts of the conference. The Book of Abstracts will be available to registered participants at the start of the conference.

The abstract has to be written in English with Times New Roman size 12 letters. The distance between two text lines should be approximately 3 mm.

The abstract must contain the full name and full address of authors. In the case of joint authorships, the name of the author who will actually present the paper at the conference should be indicated with an asterisk. Papers can only be accepted on the understanding that they will be presented at the conference.

For any further request, please contact ORC2013 Conference Secretariat

E-mail:

REFERENCES

[1]  E. Oñate and M. Cervera, “Derivation of thin plate bending elements with one degree of freedom per node”, Engng. Comput., Vol. 10, pp. 543-561, (1993).

[2]  O.C. Zienkiewicz and R.C. Taylor, The finite element method, 4th Edition, Vol. I, McGraw Hill, 1989., Vol II., 1991.


REAL-TIME THREE-DIMENSIONAL INTRAVASCULAR ULTRASOUND

Erwin J. Alles*, Koen W.A. van Dongen

Delft University of Technology,

Faculty of Applied Sciences

Laboratory of Acoustical Imaging and Sound Control

Lorentzweg 1, 2628 CJ Delft, the Netherlands

E-mail: (E.J.Alles, K.W.A.vanDongen)@TUDelft.nl

ABSTRACT

Intravascular Ultrasound (IVUS) is a medical imaging technique aimed at imaging the arterial wall from within the artery under study. Using ultrasound pulse echoes, the internal structure of the vessel wall can be probed and atherosclerotic plaque can be located and quantified with greater precision than using e.g. angiography.

IVUS utilizes mainly two designs: phased arrays and rotating single element catheters, both sensitive only in a plane perpendicular to the blood flow direction. By pulling back the catheter tip through the vessel and combining successive cross-sections, the third dimension is imaged. However, due to blood flow and heart motion the catheter position is not accurately known in most of the time frames. This hinders three-dimensional reconstruction and severely limits the resolution in the arterial direction.

To overcome this resolution problem and to enable three-dimensional imaging and motion compensation, we are developing a prototype IVUS catheter which images volumes rather than cross-sections at each catheter position. The information in these volumes can then be combined and corrected for motion artefacts to yield an accurate, densely sampled threedimensional image of the artery wall.

Using in-house simulation software including multiple scattering, simulations on the prototype design show that, together with an improved imaging algorithm based on synthetic aperture focussing (SAFT), a strong improvement over conventional IVUS hardware is expected. Measurements on an actual prototype are currently underway and will be used for a proof-of-principle of our proposed design.