contrast-to-noise ratio

contrast-to-noise ratio

An MRI term for the ratio of signal intensity differences between two regions, scaled to image noise. Improving the CNR increases the ability to distinguish between two areas of clinical interest.
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9,10) In a study of 93 patients, Zhang et al (10) showed that focal hepatic lesions had similar CT-density measurements and contrast-to-noise ratios on virtual unenhanced and true unenhanced images.
Signal-to-noise ratios (SNRs) and contrast-to-noise ratios (CNRs) were calculated from all steps.
0001; all readers, all comparisons) results for MultiHance were demonstrated for each individual diagnostic information endpoint used in the study, as well as quantitative parameters linked to the contrast enhancement obtained with the two agents (percent of enhancement of signal intensity in the CNS lesions, contrast-to-noise ratio, CNR).
The New Intera CV also features robust coronary artery imaging capabilities; enabling faster scanning, higher contrast-to-noise ratio and enhanced vessel image sharpness.