Which terms refer to computer processing features that influence radiographic image contrast?

The correct choice involves Histogram analysis and Lookup table (LUT) because both terms are key components in the digital image processing pipeline that directly affect the contrast of radiographic images.

Histogram analysis refers to the graphical representation of the distribution of pixel intensity values in an image. This analysis allows for the assessment of the exposure and dynamic range of the image, which are critical for optimizing the contrast. By analyzing the histogram, radiologists can adjust the image processing parameters to enhance areas of interest and make certain structures more visible.

The Lookup Table (LUT) is a critical tool that transforms the grayscale values in an image to adjust the contrast and brightness levels. It can remap the pixel values based on predefined parameters, thereby enhancing the contrast in specific regions. By using a LUT, specific details can be made more prominent based on clinical requirements, thus significantly influencing the perceived contrast of the image.

In contrast, the other options do not directly relate to the manipulation of radiographic image contrast. While filter application and color adjustment (the third choice) may influence certain visual aspects of an image, they do not specifically target the inherent contrast as Histogram analysis and LUT do. Resolution enhancement and sharpness control (the fourth choice) primarily pertain to the clarity and detail of