Abstract: A method and apparatus for reducing noise and enhancing the dynamic range of an image data set gather from an array (12) of transducers (T). The method includes the step of processing the image data set in a digital computer (17) by a noise reduction technique, such as deconvolving the noise component by means of a CLEAN or other algorithm. Thereafter the artifact image data introduced by the noise reduction technique is reduced by masking the processed image data set with the original image data set. This masking is done by multiplying each data value in the processed image data set by the corresponding data value in the original image data set. The method further includes scaling and normalizing the masked data and finally displaying the same on an image display device (42).

Abstract: An apparatus (10) and method for real-time reduction of noise components from echographic images. A plurality of scan line processor circuits (22) are connected through an interface (18) to an echographic imaging apparatus (20), such as an ultrasonic imaging device. Each scan line processor circuit (22) receives a row of dirty image signals (24) and simultaneously and independently performs a one-dimensional side lobe subtraction of noise components (a deconvolution of the dirty beam pattern) from the row of signals using a CLEAN algorithm. After subtraction, the resulting clean components are convolved by the scan line processor circuits (22) with a clean beam pattern to smooth the image for display. Finally, the clean image signals optionally can be masked by a masking multiplier (52) to remove processing artifacts and compressed by a compression device (56) to enhance contrast. The resulting masked and compressed clean image signals (26) are then displayed on a display device (17,20).

Abstract: An apparatus and method to generate low power ultrasonic, echograph images of selected stationary and moving target objects having high resolution. The apparatus and method include: an apparatus for transmitting a plurality of ultrasonic signals into a selected area of tissue, and apparatus for receiving the corresponding ultrasonic echo signals for each of the transmitted signals. A correlator autocorrelates and cross-correlates the transmitted and received ultrasonic signals. The correlated signals are summed, combined in ratios and partitioned into visibility amplitude data, visibility phase data, differential phase data, closure amplitude data and closure phase data for mapping. The preferred apparatus and method thereafter perform a non-linear image processing, either by an iterative side lobe subtraction signal processing procedure to remove signal noise and/or by an interative hybrid mapping signal processing procedure.