Title :
50 MHz ultrasound characterization of colitis on rats, in vitro
Author :
Soldan, Mônica ; Silva, Paulo Cesar ; Schanaider, Alberto ; Machado, João Carlos
Author_Institution :
Div. of Gastroenterology, Fed. Univ. of Rio de Janeiro, Rio de Janeiro
Abstract :
Ultrasound (50 MHz) was used for in vitro characterization of trinitrobenzene sulfonic acid-induced colitis on rats. Images and wave propagation parameters were obtained for colitis (n=38). Mean (plusmn2 se) results are: 1624.90(plusmn20.21) mmiddots-1 for speed of sound; 5.12(plusmn0.30) dBmiddotmm-1 for attenuation coefficient; 3.26(plusmn1.03)times10-3 (srmiddotmm)-1 for backscattering coefficient and 1.63 (plusmn0.10) for frequency dependence. Integrated backscattering coefficient (IBC), measured across the colon wall (n=4), ranges from 10-3 to 10-2 (srmiddotmm)-1, with the highest IBC values found in the submucosa layer. The result for speed of sound is similar to that of human sclera found in the literature. Results for attenuation and backscattering coefficients are in the same range of literature reports for human sclera and ciliary muscle, respectively. IBC plots allowed for ultrasound scattering quantification of the mucosa, submucosa and muscular layers for TNBS colitis.
Keywords :
backscatter; bioacoustics; biological organs; biomedical ultrasonics; muscle; ultrasonic absorption; ultrasonic propagation; ultrasonic scattering; ultrasonic velocity; attenuation coefficient; ciliary muscle; human sclera; in vitro ultrasound characterization; integrated backscattering coefficient; mucosa layers; muscular layers; sound speed; submucosa layer; trinitrobenzene sulfonic acid-induced colitis; ultrasound scattering quantification; wave propagation parameters; Acoustic propagation; Attenuation; Backscatter; Colon; Frequency dependence; Humans; In vitro; Muscles; Rats; Ultrasonic imaging; TNBS colitis; component; rat; tissue characterization; ultrasound biomicroscopy;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0485