Measurement of the Ultrasound Attenuation and Dispersion in Whole Human Blood and its Components From 0–70 MHz

Treeby, Bradley E.; Zhang, Edward; Thomas, Alison; Cox, Ben

doi:10.1016/j.ultrasmedbio.2010.10.020

Cited by 80 publications

(59 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A general decrease of the elastic behavior is observed at the frequency higher than 4 9 10 7 Hz; in this range, the highlighted differences between RBCs and whole blood might be due to plasma, WBCs and platelets, respectively, or all the components. We think that this difference is mainly due to plasma and its several components [17].…”

Section: Results and Conclusionmentioning

confidence: 93%

“…For that which regards the values of attenuation coefficient and dispersion we refer to the paper [17,18].…”

Section: Methodsmentioning

confidence: 99%

“…These clarifications allow to take into account many techniques, but we will refer to ultrasound investigation which is one of the most applied being a noninvasive technique and allows a possible in vivo investigation [17][18][19][20][21][22]. Generally such technique led to the determination of two parameters as function of the frequency of perturbation: attenuation and dispersion of the acoustic wave.…”

Section: A Theoretical and Experimental Approach To The Investigationmentioning

confidence: 99%

“…By taking into account the blood model introduced in the next section, the attenuation at cellular level is attributed to the interaction between the cell surface (membrane) and the fluid in which they are suspended (plasma) [17], while the attenuation at the molecular level is attributed to intracellular and extracellular (plasma) mechanisms [17,18,[20][21][22]. For what concerns the absorption mechanism at the cellular level, it is attributed to the viscous relative motion and to the thermal conduction due to the inhomogeneous regions of the blood and to the scattering phenomena [17]. At the molecular level, absorption is attributed to classical relaxation phenomena (viscosity and thermal conduction).…”

Section: A Theoretical and Experimental Approach To The Investigationmentioning

confidence: 99%

“…So we consider the blood as a viscoanelastic fluid in which the three major micro-particles are suspended (RBCs, WBCs and MLPs which are lighter than RBCs and WBCs) and distributed in a homogeneous way [17].…”

Section: Mathematical Model Of the Blood And Basic Axiommentioning

confidence: 99%

See 4 more Smart Citations

Evaluation of the human blood entropy production: a new thermodynamic approach

et al. 2016

View full text Add to dashboard Cite

In this paper, we follow the thermodynamic theory with internal variables of Kluitenberg evaluating the entropy production of red blood cell in saline solution and whole blood, respectively, when they are subjected to an ultrasound wave. From a thermodynamic point of view, blood is an open system; so to fully represent the entropy variation as function of frequency perturbation we employ phenomenological coefficients which allow us to qualitatively discriminate among classes of phenomena which cannot be observed in any other way. Therefore, a correlation between these coefficients and quantities experimentally measurable allows to a deeper knowledge of biological phenomena.Keywords Blood Á Entropy Á Non-equilibrium thermodynamic Á Red blood cells Á Ultrasound Sommario In questo lavoro, utilizzando la teoria termodinamica di Kluitenberg con variabili interne, viene valutata la produzione di entropia nel sangue intero e nei globuli rossi, quando questo viene perturbato con ultrasuoni in funzione della frequenza. Poiché da un punto di vista termodinamico, il sangue è un sistema aperto, determinare la variazione di entropia in funzione della frequenza è della massima importanza. A tale scopo vengono determinati i coefficienti fenomenologici da cui essa dipende, i quali, inoltre, permettono di discriminare qualitativamente classi di fenomeni che altrimenti non vengono considerate. Pertanto, una correlazione tra questi coefficienti e le quantità sperimentalmente misurabili permette di approfondire la conoscenza dei fenomeni biologici.

show abstract

Section: Results and Conclusionmentioning

confidence: 93%

“…For that which regards the values of attenuation coefficient and dispersion we refer to the paper [17,18].…”

Section: Methodsmentioning

confidence: 99%