Characterization of dense bovine cancellous bone tissue microstructure by ultrasonic backscattering using weak scattering models

2007 ◽  
Vol 122 (2) ◽  
pp. 1180-1190 ◽  
Author(s):  
D. D. Deligianni ◽  
K. N. Apostolopoulos
Keyword(s):  
Bone Tissue ◽  
Cancellous Bone ◽  
Tissue Microstructure ◽  
Ultrasonic Backscattering ◽  
Weak Scattering

Characterization of Tissue Microstructure Scatterer Distribution with Spectral Correlation

1993 ◽  
Vol 15 (3) ◽  
pp. 238-254 ◽  
Author(s):  
Tomy Varghese ◽  
Kevin D. Donohue
Keyword(s):  
Formation Process ◽  
Biological Tissue ◽  
Statistical Parameters ◽  
Spectral Correlation ◽  
Tissue Microstructure ◽  
Power Spectral ◽  
Spectral Peaks ◽  
Ultrasound Signal

Characterization of tissue microstructure from the backscattered ultrasound signal using the spectral autocorrelation (SAC) function provides information about the scatterer distribution in biological tissue. This paper demonstrates SAC capabilities in characterizing periodicities in A-scans due to regularity in the scatterer distribution. The A-scan is modelled as a cyclostationary signal, where the statistical parameters of the signal vary in time with single or multiple periodicities. This periodicity manifests itself as spectral peaks both in the power spectral density (PSD) and in the SAC. Periodicity in the PSD will produce a well defined dominant peak in the cepstrum, which has been used to determine the scatterer spacing. The relationship between the scatterer spacing and the spacing of the spectral peaks is established using a stochastic model of the echo-formation process from biological tissue. The distribution of the scatterers within the microstructure is modelled using a Gamma function, which offers a flexible method of simulating parametric regularity in the scatterer spacing. Simulations of the tissue microstructure for lower orders of regularity indicate that the SAC components reveal information about the scatterer spacing that are not seen in the PSD and the cepstrum. The echo-formation process is tested by simulating microstructure of varying regularity and analyzing their effect on the SAC, PSD and cepstrum. Experimental validation of the simulation results are provided using in vivo scans of the breast and liver tissue that show the presence of significant spectral correlation components in the SAC.

scholarly journals Corrigendum to “Characterization of Bone Marrow Mononuclear Cells on Biomaterials for Bone Tissue EngineeringIn Vitro”

2015 ◽  
Vol 2015 ◽  
pp. 1-1
Author(s):  
Dirk Henrich ◽  
René Verboket ◽  
Alexander Schaible ◽  
Kerstin Kontradowitz ◽  
Elsie Oppermann ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Bone Tissue ◽  
Mononuclear Cells ◽  
Bone Marrow Mononuclear Cells

Preparation and characterization of nano-sized hydroxyapatite/alginate/chitosan composite scaffolds for bone tissue engineering

2015 ◽  
Vol 54 ◽  
pp. 20-25 ◽  
Author(s):  
Hye-Lee Kim ◽  
Gil-Yong Jung ◽  
Jun-Ho Yoon ◽  
Jung-Suk Han ◽  
Yoon-Jeong Park ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Composite Scaffolds ◽  
Chitosan Composite
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