Article

Reduction of ultrasound inertial cavitation threshold using bifrequency excitation

INSERM, U556, Lyon F-69003, France; Universitý Claude Bernard Lyon 1, Lyon F-69000, France
Applied Physics Letters (impact factor: 3.84). 09/2006; DOI:10.1063/1.2345230 pp.094106 - 094106-3
Source: IEEE Xplore

ABSTRACT Within the scope of an application to transcutaneous ultrasonic thrombolysis, this study compares inertial cavitation thresholds obtained at the focus of a transducer for two types of ultrasonic excitations: a classical one frequency signal and an excitation combining two slightly different frequencies. A cepstral filtering method is used to measure inertial cavitation activity for these signals. A 30% reduction of the threshold is observed when using bifrequency excitation.

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Keywords

bifrequency excitation
 
cepstral
 
classical
 
inertial cavitation thresholds
 
measure inertial cavitation activity
 
signals
 
transcutaneous ultrasonic thrombolysis
 
transducer
 
ultrasonic excitations