Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.992021
