Chapter 13 Contrast

 The radiograph must exhibit differences in the brightness levels or densities (image contrast) in order to differentiate among the anatomic tissues

 number of different shades of gray that can be stored and displayed in a digital image or film

 the range of densities visible on film or digital image

• Long scare
• Low contrast
• Less Contrast

 Describes an imaging receptor's ability to distinguish between objects similar in subject contrast

 refers to the smallest object that can be imaged.

 refers to the distinctness or sharpness of the structural lines that make up the recorded film image.

decrease in resolution

Density

 combination of rows and columns

 "picture elements" or smallest component of matrix