Abstract
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.
| Original language | English |
|---|---|
| Journal | I E E E Transactions on Medical Imaging |
| Volume | 16 |
| Issue number | 4 |
| ISSN | 0278-0062 |
| Publication status | Published - 1997 |