Which term reflects the quality of a radiographic image determined by the range of densities represented?

The term that accurately reflects the quality of a radiographic image determined by the range of densities represented is dynamic range. Dynamic range refers to the spectrum of luminance that can be captured by the imaging system, essentially indicating the capability of the system to differentiate various levels of exposure from very low to very high. A wider dynamic range allows for a greater variety of density levels to be represented in the final image, which contributes to the overall detail and quality of the radiographic image.

The concept of exposure range pertains to the range of x-ray exposure that the imaging system can effectively utilize, but it does not necessarily relate directly to the visual quality of density representation in the image. Density range generally refers to the difference in optical density levels on the film or digital image but does not encompass the entire capability of the radiographic system. Lastly, the scale of contrast describes the ratio between the darkest and lightest parts of the image and helps in characterizing the contrast within the image rather than the overall range of densities that can be captured. Overall, dynamic range is the most comprehensive term regarding the representation of varying densities in radiography.