Title :
Wide-band acoustic pulse detection in opto-acoustic tomography system
Author :
Andreev, Valeriy G. ; Oraevsky, Alexander A. ; Karabutov, Alexander A.
Author_Institution :
Acoustics Dept., Moscow State Univ., Russia
Abstract :
The optoacoustic tomography (OAT) utilizes acoustic waves induced by short laser pulses in tumor with preferential light absorption. Waveform of the opto-acoustic signal detected by a wide-band transducer array provides information about shape of tumor and its specificity. The 32-element acoustic array was employed in clinical prototype of laser optoacoustic imaging system (LOIS). Piezopolymer PVDF film was used for the array transducer fabrication. Sensitivity of the array and its transient directivity pattern are discussed in this paper. The array performance was tested in experiments with phantoms
Keywords :
acoustic tomography; biomedical equipment; biomedical ultrasonics; laser applications in medicine; light absorption; optical tomography; photoacoustic effect; tumours; ultrasonic transducer arrays; array sensitivity; array transducer fabrication; clinical prototype; laser optoacoustic imaging system; medical diagnostic imaging; medical instrumentation; optoacoustic signal waveform; optoacoustic tomography system; phantom experiments; piezopolymer PVDF film; preferential light absorption; short laser pulses; wide-band acoustic pulse detection; Absorption; Acoustic pulses; Acoustic signal detection; Acoustic transducers; Acoustic waves; Neoplasms; Optical pulses; Signal detection; Tomography; Wideband;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921539
