2011
DOI: 10.1109/tbme.2010.2096537
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Detecting Spatial Variations of Erythrocytes by Ultrasound Backscattering Statistical Parameters Under Pulsatile Flow

Abstract: The echogenicity of whole blood is known to vary during the flow cycle under pulsatile flow both in vitro and in vivo. However, the fundamental underlying mechanisms remain uncertain. The combined effects of flow acceleration and the shear rate were recently used to explain the cyclic variations of signals backscattered from flowing blood. However, testing this hypothesis requires determination of the spatial distributions of red blood cells (RBCs) in flowing blood. Recently, the Nakagami (m) and scaling (Ω) p… Show more

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Cited by 16 publications
(3 citation statements)
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“…If that assumption is incorrect, as recent reports suggest [24], [25], power contributed by shells with differing velocity will have to include a weighting correction for the shell's cell velocity.…”
Section: Discussionmentioning
confidence: 99%
“…If that assumption is incorrect, as recent reports suggest [24], [25], power contributed by shells with differing velocity will have to include a weighting correction for the shell's cell velocity.…”
Section: Discussionmentioning
confidence: 99%
“…While the shear rate and pressure fluctuations are more rapid in vivo, the erythrocytes are more likely to be subjected to external physical forces. The acceleration and deceleration of the flow might enhance rouleaux formation because there are more chances to form a larger rouleaux when the flow is accelerating [ 40 , 41 ]. Hence, the streak-like pattern presumably caused by erythrocyte deformation might be more evident in in vivo data.…”
Section: Discussionmentioning
confidence: 99%
“…Ultrasound backscattering has been frequently used to characterize properties of blood under various flow conditions [11,12,46]. Specifically, the strength of ultrasound backscatter by blood has been found to depend on the shear rate of the flow and RBC aggregation [47][48][49]. Furthermore, the properties of coagulating blood have been assessed based on ultrasound signals backscattered by blood in an excised section of the porcine aorta [50].…”
Section: Ultrasonic Characterization Of Blood Coagulation Under Flowimentioning
confidence: 99%