Accession Number : ADA318584
Title : Development of Methods for Improved Breast Imaging Using Ultrasound.
Descriptive Note : Final rept. 1 Jul 94-30 Jun 96,
Corporate Author : DREXEL UNIV PHILADELPHIA PA
Personal Author(s) : Reid, John M.
PDF Url : ADA318584
Report Date : JUL 1996
Pagination or Media Count : 86
Abstract : A novel framework was introduced for the deconvolution of B-scan images. A model for the rf image was developed first, and then imaging distortions were reconstructed using higher-order statistics of the measured image lines. Based on the estimated distortions deconvolution of the corresponding image was performed, which for the case of images of tissue mimicking phantom as well as human tissue images, led to significant resolution improvement. In the past, estimation of distortions has been carried out using exclusively second order statistics (auto correlation). Autocorrelation, however,can recover only the minimum phase equivalent of the true distortions, because it is blind to phase. Imaging distortions were also estimates using second order statistics of the image lines. It was demonstrated that although these estimates did lead to resolution improvement, the amount of improvement was far less significant than the one obtained with the higher-order statistics based estimates.
Descriptors : *IMAGES, *ULTRASONIC RADIATION, *BREAST CANCER, TISSUES(BIOLOGY), DETECTION, ACOUSTIC WAVES, RESOLUTION, AUTOCORRELATION, ESTIMATES, HUMAN BODY, ORDER STATISTICS, WOMEN, DISTORTION, RADIOFREQUENCY, MAMMARY GLANDS, RADIOLOGY.
Subject Categories : Medicine and Medical Research
Statistics and Probability
Radiofrequency Wave Propagation
Distribution Statement : APPROVED FOR PUBLIC RELEASE