Title :
Multiple echoes putting down in ultrasound
Author :
Caciotta, M. ; Leccese, F.
Author_Institution :
Dept. of Electron. Eng., Roma Tre Univ., Italy
Abstract :
The problem of useful echoes identification in an ultrasound (US) signal is faced. The approach used consists in the time rearrangement of a paths matrix built utilizing the electroacoustic equivalence. Some acoustic parameter identifications of slabs encountered by US wave has been demonstrated in particular cases. The precise time positioning of identified useful echoes has been obtained applying an improved maximum likelihood estimator. The large computational load of the method has been faced by using parallel computation. Experiments on software performance are also presented
Keywords :
Laplace transforms; acoustic impedance; acoustic signal detection; acoustic signal processing; biomedical ultrasonics; computational complexity; echo; electric impedance; maximum likelihood estimation; medical signal detection; parallel algorithms; signal sampling; virtual instrumentation; Fischer matrix; Laplace transform; acoustic parameter identification; algorithmic filter effects; characteristic impedance; delay line; electroacoustic equivalence; improved maximum likelihood estimator; multiple echoes putting down; parallel algorithm; parallel computation; paths matrix; precise time positioning; slabs; software performance; time rearrangement; transmission line theory; ultrasound signal; useful echoes identification; virtual instrumentation; Acoustic materials; Acoustic reflection; Acoustic signal detection; Acoustic waves; Impedance; Maximum likelihood detection; Maximum likelihood estimation; Parameter estimation; Signal processing; Ultrasonic imaging;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE
Conference_Location :
Budapest
Print_ISBN :
0-7803-6646-8
DOI :
10.1109/IMTC.2001.928881
