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Titolo:
On the interaction between ultrasound and contrast agents during Doppler investigations
Autore:
Tortoli, P; Michelassi, V; Corsi, M; Righi, D; Takeuchi, Y;
Indirizzi:
Univ Florence, Dept Elect & Telecommun, I-50139 Florence, Italy Univ Florence Florence Italy I-50139 Telecommun, I-50139 Florence, Italy Univ Florence, Div Angiol, Cardiovasc Dis Unit, I-50139 Florence, Italy Univ Florence Florence Italy I-50139 c Dis Unit, I-50139 Florence, Italy Univ Roma Tre, Dept Mech & Ind Engn, Rome, Italy Univ Roma Tre Rome Italy iv Roma Tre, Dept Mech & Ind Engn, Rome, Italy Kagoshima Univ, Dept Informat & Comp Sci, Kagoshima 890, Japan Kagoshima Univ Kagoshima Japan 890 rmat & Comp Sci, Kagoshima 890, Japan
Titolo Testata:
ULTRASOUND IN MEDICINE AND BIOLOGY
fascicolo: 9, volume: 27, anno: 2001,
pagine: 1265 - 1273
SICI:
0301-5629(200109)27:9<1265:OTIBUA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
FREQUENCY-SHIFT; IN-VIVO; ENHANCEMENT;
Keywords:
Doppler ultrasound; contrast agents; radiation force; streaming; spectral analysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
27
Recensione:
Indirizzi per estratti:
Indirizzo: Tortoli, P Univ Florence, Dept Elect & Telecommun, Via Santa Marta 3, I-50139 Florence, Italy Univ Florence Via Santa Marta 3 Florence Italy I-50139, Italy
Citazione:
P. Tortoli et al., "On the interaction between ultrasound and contrast agents during Doppler investigations", ULTRASOUN M, 27(9), 2001, pp. 1265-1273

Abstract

Knowledge of interaction mechanisms between ultrasound (US) and contrast agents (CA) suspended in blood is important for a correct interpretation of clinical investigation results. Experiments performed in different laboratories have shown that, as a consequence of primary radiation force, CA tend to move away from the US transducer. Accordingly, Doppler spectra produced by particles suspended in moving water turn out to be significantly alteredfrom what is theoretically expected. The purpose of this paper is twofold. First, an original model describing the bubble dynamics as the outcome of the balance between US radiation force and fluid drag force is validated for the case in which bubbles are suspended in blood. The high fluid viscosity is shown to prevent significant bubble deviations from the unperturbed fluid streamlines so that, in large vessels, a residual spectral distortion may exist only at the highest intensity levels permitted by current regulations. Finally, the relative importance and differences between the effect ofprimary radiation force and streaming mechanisms that, in principle, couldlead to similar effects, are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 22:31:32