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Titolo:
HIGHER-ORDER SPECTRA BASED DECONVOLUTION OF ULTRASOUND IMAGES
Autore:
ABEYRATNE UR; PETROPULU AP; REID JM;
Indirizzi:
DREXEL UNIV,INST BIOMED ENGN & SCI PHILADELPHIA PA 19104 DREXEL UNIV,DEPT ELECT & COMP ENGN PHILADELPHIA PA 19104
Titolo Testata:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
fascicolo: 6, volume: 42, anno: 1995,
pagine: 1064 - 1075
SICI:
0885-3010(1995)42:6<1064:HSBDOU>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
B-SCAN IMAGES; INVIVO MEASUREMENTS; BEAM DISTORTION; BREAST; RESOLUTION; GENERATION; PULSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
U.R. Abeyratne et al., "HIGHER-ORDER SPECTRA BASED DECONVOLUTION OF ULTRASOUND IMAGES", IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 42(6), 1995, pp. 1064-1075

Abstract

We address the problem of improving the spatial resolution of ultrasound images through blind deconvolution, The ultrasound image formationprocess in the RF domain can be expressed as a spatio-temporal convolution between the tissue response and the ultrasonic system response, plus additive noise, Convolutional components of the dispersive attenuation and aberrations introduced by propagating through the object being imaged are also incorporated in the ultrasonic system response, Ourgoal is to identify and remove the convolutional distortion in order to reconstruct the tissue response, thus enhancing the diagnostic quality of the ultrasonic image, Under the assumption of an independent, identically distributed, zero-mean, non-Gaussian tissue response, we were able to estimate distortion kernels using bicepstrum operations on RF data, Separate 1-D distortion kernels were estimated corresponding to axial and lateral image lines and used in the deconvolution process, The estimated axial kernels showed similarities to the experimentally measured pulse-echo wavelet of the imaging system, Deconvolution results from B-scan images obtained with clinical imaging equipment showed a 2.5-5.2 times gain in lateral resolution, where the definition of the resolution has been based on the width of the autocovariance function of the image, The gain in axial resolution was found to be between1.5 and 1.9.

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Documento generato il 15/07/20 alle ore 06:37:49