DocumentCode :
2368823
Title :
Application of vibro-acoustography to bone elasticity imaging
Author :
Callé, Samuel ; Remenieras, Jean-Pierre ; Matar, Oliver Bou ; Defontaine, Marielle ; Gomez, Michel-Ange ; Patat, Frédéric
Author_Institution :
GIP Ultrasons/LUSSI, Tours, France
Volume :
2
fYear :
2001
fDate :
2001
Firstpage :
1601
Abstract :
The aim is the use of the vibro-acoustography technique for bone imaging. This method consists in applying a highly-localized low frequency vibration inside the object and observing with an hydrophone the low frequency pressure field radiating by this vibration. The results obtained with this imaging method show that this technique is, in a precise set-up configuration (in terms of central frequency, difference frequency and exposure time), adapted to bone imaging, with transverse resolutions lower than 300 μm. Two bones which are very sensitive to decalcification have been tested: the calcaneus bone and the femoral neck. Correlation has then been made between our in vitro bone images and images providing from other techniques proportional to different characteristics of the medium. These techniques are bone ultrasound attenuation (BUA) and computed tomography (CT). The amplitudes of vibro-acoustic signals radiating from phosphocalcic ceramics (bone substitute of calcium hydroxyapatite) with different porosities have been evaluated to test our imaging system. The good agreement between these results and the description of our images let us suggest that bone decalcification could be detected thanks to vibro-acoustic bone images
Keywords :
bioacoustics; biomechanics; biomedical imaging; bone; porosity; vibrations; bone decalcification; bone elasticity imaging; bone substitute; calcaneus bone; central frequency; decalcification; difference frequency; exposure time; femoral neck; highly-localized low frequency vibration; hydrophone; imaging method; in vitro bone images; low frequency pressure field; object; phosphocalcic ceramics; porosities; precise set-up configuration; transverse resolutions; vibro-acoustic bone images; vibro-acoustic signals; vibro-acoustography technique; Bones; Computed tomography; Elasticity; Frequency; High-resolution imaging; Image resolution; Neck; Sonar equipment; Testing; 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.2001.992028
Filename :
992028
Link To Document :
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