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European Radiology
Erschienen in: European Radiology 3/2011

01.03.2011 | Ultrasound

Assessment of tissue perfusion by contrast-enhanced ultrasound

verfasst von: Emilio Quaia

Erschienen in: European Radiology | Ausgabe 3/2011

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Abstract

Contrast-enhanced ultrasound (CEUS) with microbubble contrast agents is a new imaging technique for quantifying tissue perfusion. CEUS presents several advantages over other imaging techniques in assessing tissue perfusion, including the use of microbubbles as blood-pool agents, portability, availability and absence of exposure to radiation or nuclear tracers. Dedicated software packages are necessary to quantify the echo-signal intensity and allow the calculation of the degree of tissue contrast enhancement based on the accurate distinction between microbubble backscatter signals and native tissue background. The measurement of organ transit time after microbubble injection and the analysis of tissue reperfusion kinetics represent the two fundamental methods for the assessment of tissue perfusion by CEUS. Transit time measurement has been shown to be feasible and has started to become accepted as a clinical tool, especially in the liver. The loudness of audio signals from spectral Doppler analysis is used to generate time-intensity curves to follow the wash-in and wash-out of the microbubble bolus. Tissue perfusion may be quantified also by analysing the replenishment kinetics of the volume of microbubbles after their destruction in the imaged slice. This allows to obtain semiquantitative parameters related to local tissue perfusion, especially in the heart, brain, and kidneys.
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Metadaten
Titel
Assessment of tissue perfusion by contrast-enhanced ultrasound
verfasst von
Emilio Quaia
Publikationsdatum
01.03.2011
Verlag
Springer-Verlag
Erschienen in
European Radiology / Ausgabe 3/2011
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-010-1965-6

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