Aberration measurement and correction with a high resolution 1.75D array

Author

Fernandez, Anna T. ; Dahl, Jeremy J. ; Dumont, Douglas M. ; Trahey, Gregg E.

Author_Institution

Dept. of Biomed. Eng., Durham Univ., UK

Volume

2

fYear

2001

fDate

2001

Firstpage

1489

Abstract

Accurate measurement of tissue induced aberrations is necessary for effective adaptive ultrasound imaging. We acquired single channel RF data on a 6.7 MHz, 8×128 array (Tetrad Co.) operating at F/1.0 in azimuth and F/2.89 in elevation. This array was interfaced to a Siemens Elegra scanner, allowing for data acquisition during routine clinical scanning. Breast images in three patients and four volunteers (for a total of 16 scans), and thyroid and liver images in six volunteers (10 scans each) were taken. A least squares algorithm was employed to estimate the arrival time error induced by the tissue and to generate corrected images. In general, mild (20-40 nsec r.m.s.) and spatially stable aberration profiles were measured

Keywords

aberrations; biological tissues; biomedical ultrasonics; least squares approximations; ultrasonic arrays; 6.7 MHz; RF signal; Siemens Elegra scanner; aberration correction; aberration measurement; adaptive ultrasound imaging; breast; clinical scanning; data acquisition; high-resolution 1.75D array; least squares algorithm; liver; thyroid; tissue; Azimuth; Breast; Data acquisition; Error correction; High-resolution imaging; Least squares approximation; Liver; Radio frequency; Ultrasonic imaging; Ultrasonic variables measurement;

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.2001.992002

Filename

992002