| 摘要 |
Gray scale information is mapped to a display with increased dynamic range. Rather than mapping ultrasound data to equal color components, the mapping is offset. The offset may provide a deviation from gray, but the deviation of such a small increment may not be perceptible. Instead, the deviation provides different brightness, which is more easily perceived. The deviation allows for additional levels of gray, such as the 64 levels on a 6-bit display plus any deviation values (e.g., 128 levels for 64 equal color components and 64 with one of the color components offset by one increment). Higher dynamic range ultrasound data maps with less or no loss of dynamic range to a display with a lower true gray scale dynamic range. Spatial dithering may alternatively or additionally increase perception of the dynamic range.
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