IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control · 1989 · 14 citations · 4 references
Natural SciencesBioengineeringBiomedical EngineeringAcousticsUltrasonographyUltrasoundAcoustic ImagingDiagnostic UltrasonographyTransducer TechnologyUltrasonicsUltrasound ImagingUltrasound PhysicsExcitationLeast Mean Squares FilteringPulse ShapingUltrasonic AcousticsUltrasonic ImagingUltrasonic Signal ProcessingUltrasonic TransducersWeighted Least Squares
The resolution of adjacent surfaces in medical ultrasonic imaging depends on the duration of a reflected echo. By shaping the excitation signal of the transducer, this duration can be decreased. The authors present a method for effective calculation of the excitation pulse by introducing a weighting function that defines the resolution. A class of filter is obtained that includes the least-mean-squares filter, the pure inverse filter, and the matched filter. The method is demonstrated in an application that increases the resolution of an ultrasonic transducer.
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