Journal article
Lesion Contrast Enhancement in Medical Ultrasound Imaging
Methods for improving the contrast-to-noise ratio (CNR) of low-contrast lesions in medical ultrasound imaging are described. Differences in the frequency spectra and amplitude distributions of the lesion and its surroundings can be used to increase the CNR of the lesion relative to the background. Automated graylevel mapping is used in combination with a contrast-weighted form of frequency-diversity speckle reduction.
In clinical studies, the techniques have yielded mean CNR improvements of 3.2 dB above ordinary frequency-diversity imaging and 5.6 dB over sharper conventional images, with no post-processing graylevel mapping.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 1997 |
| Pages: | 416-25 |
| ISSN: | 1558254x and 02780062 |
| Types: | Journal article |
| DOI: | 10.1109/42.611351 |
3.2 dB 5.6 dB Backscatter Biomedical imaging Filters Frequency dependence Hemangioma Humans Image Enhancement Lesions Liver Liver Cirrhosis Liver Neoplasms Mathematics Medical diagnostic imaging Narrowband Phantoms, Imaging Scattering Speckle Ultrasonic imaging Ultrasonography acoustic signal processing amplitude distribution automated graylevel mapping backscatter biomedical ultrasonics contrast-to-noise ratio improvement methods contrast-weighted method frequency spectra frequency-diversity imaging frequency-diversity speckle reduction image enhancement lesion contrast enhancement low-contrast lesions medical diagnostic imaging medical image processing medical ultrasound imaging post-processing graylevel mapping speckle
