Title :
A high bandwidth transducer optimized for harmonic imaging
Author :
Hossack, John A. ; Mauchamp, P. ; Ratsimandresy, L.
Author_Institution :
Dept. of Biomed. Eng., Virginia Univ., Charlottesville, VA, USA
Abstract :
Transducer bandwidth rarely limits perceived spatial resolution in conventional medical ultrasonic array based imaging. However, the rapid adoption of harmonic imaging modes in the last three years has resulted in a situation where limited transducer bandwidth has measurable impact on image resolution. In this paper, a new method is described for achieving high bandwidth at the fundamental transmitted frequency and simultaneously achieving high bandwidth at the harmonic frequency during the receive operation. This method is based on using a dual layer transducer system in which the effective polarity of the two layers is switched between transmit and receive
Keywords :
biomedical transducers; biomedical ultrasonics; image resolution; ultrasonic transducers; dual layer transducer system; effective polarity switching; fundamental transmitted frequency; harmonic frequency; harmonic imaging; high bandwidth transducer; image resolution; medical ultrasonic array; modified KLM model; optimized transducer; pulse echo response; spatial resolution; Bandwidth; Biomedical imaging; Biomedical transducers; Frequency; High-resolution imaging; Spatial resolution; Ultrasonic imaging; Ultrasonic transducer arrays; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.921498
