The ultrasound contrast agents used in echographic imaging techniques are essentially constituted by a suspension of microbubbles containing gas enclosed within an organic shell. In the present paper, the elastic characteristics of contrast agents have been studied, as they depend upon the temperature, using a photoacoustic technique. Central element of the experimental apparatus is a photoacoustic cell, where the ultrasound contrast agent is inserted and behaves as a Helmholtz resonator. A laser radiation modulated at frequencies in the range 100-1500 Hz, causes the solution volume containing the bubbles to vary; this causes thin membrane, which closes a small pipe inserted on the surface of the photoacoustic cell, to vibrate. The amplitude variations of the membrane, measured through a laser probe interferometer, vs. bubble concentration and temperature of the solution, allow one to investigate microbubbles thermal behavior.

thermal behavior of ultrasound contrast agents for echographic imaging techniques through a photoacoustic system / Alippi, Adriano; Bettucci, Andrea; Biagioni, Angelo; Conclusio, Davide; D'Orazio, Annunziata; Germano, Massimo; Passeri, Daniele. - STAMPA. - (2010), pp. 103-1-103-8. (Intervento presentato al convegno EAA EUROREGIO 2010 1st European Congress on Sound and Vibration tenutosi a Ljubljana, Slovenia nel 15-18 Settembre 2010).

thermal behavior of ultrasound contrast agents for echographic imaging techniques through a photoacoustic system

ALIPPI, Adriano;BETTUCCI, Andrea;BIAGIONI, ANGELO;CONCLUSIO, DAVIDE;D'ORAZIO, Annunziata;GERMANO, Massimo;PASSERI, Daniele
2010

Abstract

The ultrasound contrast agents used in echographic imaging techniques are essentially constituted by a suspension of microbubbles containing gas enclosed within an organic shell. In the present paper, the elastic characteristics of contrast agents have been studied, as they depend upon the temperature, using a photoacoustic technique. Central element of the experimental apparatus is a photoacoustic cell, where the ultrasound contrast agent is inserted and behaves as a Helmholtz resonator. A laser radiation modulated at frequencies in the range 100-1500 Hz, causes the solution volume containing the bubbles to vary; this causes thin membrane, which closes a small pipe inserted on the surface of the photoacoustic cell, to vibrate. The amplitude variations of the membrane, measured through a laser probe interferometer, vs. bubble concentration and temperature of the solution, allow one to investigate microbubbles thermal behavior.
2010
EAA EUROREGIO 2010 1st European Congress on Sound and Vibration
membrane; ultrasound contrast agents; laser probe interferometer; microbubbles; photoacoustic cell
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
thermal behavior of ultrasound contrast agents for echographic imaging techniques through a photoacoustic system / Alippi, Adriano; Bettucci, Andrea; Biagioni, Angelo; Conclusio, Davide; D'Orazio, Annunziata; Germano, Massimo; Passeri, Daniele. - STAMPA. - (2010), pp. 103-1-103-8. (Intervento presentato al convegno EAA EUROREGIO 2010 1st European Congress on Sound and Vibration tenutosi a Ljubljana, Slovenia nel 15-18 Settembre 2010).
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/404702
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact