학술논문
A prototype of a 500 kHz ultrasonic matricial device: beam scanner. Application to in-vivo heel bone quantitative characterization
Document Type
Conference
Author
Source
1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Ultrasonics Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE. 2:1585-1588 vol.2 1999
Subject
Language
ISSN
1051-0117
Abstract
In the context of a European Space Agency Technical Research Program, focused on bone activities in micro gravity environment, Matra Marconi Space, Vermon, LIP, ULTRASONS TECHNOLOGIES and GIP Ultrasons have been asked to develop a prototype of an ultrasonic 2D array bone densitometer. This transmission device is composed of two matrices of 24/spl times/24 elements and is functioning at 500 kHz central frequency. The test objects are scanned over a 60/spl times/60 mm/sup 2/ with an active aperture of 30 mm diameter. After the acquisition and reconstruction step, the signals are processed to extract two parametric images of attenuation and celerity. The first experiments, reported in this paper have been performed in immersion. Parametric images of in-vitro phantoms and in-vivo heel bone are presented.