NDLI: An axial array for three-dimensional intravascular ultrasound

Content Provider	IEEE Xplore Digital Library
Author	Alles, E.J. van Dijk, G.J. van der Steen, A.F.W. Gisolf, A. van Dongen, K.W.A.
Copyright Year	2012
Description	Author affiliation: Lab. of Acoust. Wavefield Imaging, Delft Univ. of Technol., Delft, Netherlands (Alles, E.J.; van Dijk, G.J.; Gisolf, A.; van Dongen, K.W.A.) \|\| Biomed. Eng., Erasmus MC, Rotterdam, Netherlands (van der Steen, A.F.W.)
Abstract	With intravascular ultrasound, high resolution cross-sectional images of arterial walls can be obtained. By pulling a catheter through the artery in the axial direction and stacking consecutive cross-sectional images, a three-dimensional image is obtained. However, cardiac and respiratory motion, combined with a high pull-back rate and a narrow axial radiation pattern, result in poor axial resolution and significant image distortion. To avoid these limitations, in this work the design of an axial linear transducer array is presented with which volumetric rather than cross-sectional images are obtained in every pullback position. The prototype consists of eight elements of dimensions 100 μm by 350 μm, with a kerf of 100 μm, operating at a center frequency of 21 MHz with a bandwidth of more than 80 %. For both an ex vivo bovine artery and a stent-emulating phantom, the image quality in the circumferential and radial directions is similar to that of a conventional catheter. However, in the axial direction a significant increase in image quality is achieved. With the array, it is possible to image both the struts of a stent phantom and the underlying structures, whereas with the conventional catheter the struts are not properly localised and the underlying tissue is not distinguishable from the stent.
Starting Page	1153
Ending Page	1156
File Size	816548
Page Count	4
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0287
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Arrays Arteries Catheters Image resolution Ultrasonic imaging Image quality Phantoms
Content Type	Text
Resource Type	Article

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