Title :
Adaptive inverse filtering with chirp for medical ultrasound
Author :
Shyam, Venkatraman ; Rao, N. A H K
Author_Institution :
Center for Imaging Sci., Rochester Inst. of Technol., NY, USA
Abstract :
In medical ultrasound imaging, the axial resolution is limited by the bandwidth of the transducer. In a linear frequency modulation (chirp) pulse coding technique for imaging, it is possible to inverse modulate the chirp amplitude by a function adaptively derived from the transducer frequency response. The transducer output then becomes an equalized chirp with a wider effective bandwidth. Subsequent pulse compression processing consequently improves the resolution. This concept has been evaluated experimentally in this paper
Keywords :
acoustic signal processing; adaptive signal processing; biomedical ultrasonics; image resolution; medical image processing; pulse compression; adaptive inverse filtering; axial resolution; chirp pulse; effective bandwidth; equalized chirp; linear frequency modulation pulse; medical diagnostic imaging; pulse compression processing; transducer bandwidth; transducer frequency response; transducer output; Adaptive filters; Bandwidth; Biomedical imaging; Biomedical transducers; Chirp modulation; Filtering; Image resolution; Pulse modulation; Ultrasonic imaging; Ultrasonic transducers;
Conference_Titel :
Engineering in Medicine and Biology Society, 1995., IEEE 17th Annual Conference
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2475-7
DOI :
10.1109/IEMBS.1995.575278
