Title :
Ultrasound parametric imaging of bone in vivo
Author :
Laugier, P. ; Fournier, B. ; Berger, G.
Author_Institution :
Lab. d´´Imagerie Parametrique, CNRS, Paris, France
Abstract :
The measurement of ultrasound frequency-dependent attenuation and velocity is a new technique of investigation of skeletal status. An ultrasound transmission scanning system was constructed to make in vivo parametric images of the acoustic properties of the heel. Images were obtained in transmit mode by using a pair of broadband focused transducers (center frequency 0.5 MHz, diameter 29 mm, focus 50 mm) immersed in a water bath at room temperature. The total duration of the acquisition period was 3 minutes. Comparison between the image of the slope of attenuation and the X-ray radiograph of the calcaneus was possible in one case. All the anatomical details could be identified on both images. The images reported here demonstrate the wide range of values of slope of attenuation found in the bone thus reinforcing the idea of tremendous heterogeneity of the acoustic properties of bone. This suggest that the accurate control of the position of the measurement site is of the utmost importance for between subject comparison and for repetitive measurements
Keywords :
biomedical ultrasonics; bone; 0.5 MHz; 29 mm; 3 min; 50 mm; accurate control; acquisition period; anatomical details; between subject comparison; bone acoustic properties heterogeneity; heel acoustic properties; measurement site position; repetitive measurements; skeletal status investigation technique; ultrasound frequency-dependent attenuation; water bath immersion; Acoustic imaging; Acoustic measurements; Attenuation measurement; Bones; Focusing; Frequency measurement; In vivo; Position measurement; Ultrasonic imaging; Velocity measurement;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495761
