A forward-viewing ring-annular array for intravascular ultrasound imaging

Author

Wang, Yao ; Stephens, Douglas N. ; O´Donnell, Matthew

Author_Institution

Biomed. Eng. Dept., Michigan Univ., Ann Arbor, MI, USA

Volume

2

fYear

2001

fDate

2001

Firstpage

1573

Abstract

We have investigated IVUS array design and image synthesis methods allowing simultaneous sideward imaging at 20MHz and forward imaging at 10MHz. This design is appropriate for over-the-wire delivery but limits the forward-viewing aperture to a ring-annular array. In particular, a 1200μm diameter ring-annular array with 64 elements has been constructed. The measured forward-viewing radiation pattern of an individual element indicates an acceptance angle range of over 90°. Our beam synthesis involves a total of 210 transceiver firings in a synthetic imaging mode for a given 3D frame. Broadband simulations demonstrated this design can achieve side-lobes under -40dB for on-axis situations and under -30dB for steering to the edge of a 60° cone

Keywords

biomedical ultrasonics; ultrasonic imaging; 10 MHz; 1200 micron; 20 MHz; IVUS array design; acceptance angle range; broadband simulations; forward-viewing radiation pattern; forward-viewing ring-annular array; image synthesis methods; intravascular ultrasound imaging; over-the-wire delivery; side-lobes; simultaneous sideward-forward imaging; synthetic imaging mode; Apertures; Biomedical imaging; Catheters; Frequency; Image generation; Image segmentation; Lesions; Phased arrays; Transceivers; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2001 IEEE

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-7177-1

Type

conf

DOI

10.1109/ULTSYM.2001.992021

Filename

992021