Which two factors primarily determine the quality of an X-ray image?

The quality of an X-ray image is primarily determined by contrast and resolution. Contrast refers to the difference in radiographic density between various tissues or structures within the image, allowing for the differentiation of anatomical features. A high-contrast image enables better visualization of abnormalities or different tissue types, which is essential for accurate diagnosis.

Resolution, on the other hand, relates to the clarity and detail of the image. It is defined by the ability of the imaging system to distinguish between two closely spaced objects. High resolution results in sharper images where fine details can be discerned. Factors influencing resolution include the size of the X-ray beam, the characteristics of the detector, and the geometric configuration of the X-ray system.

In combination, optimal contrast and resolution enhance the diagnostic capability of X-ray images, making option B the correct answer. Other factors, such as exposure time, distance, and intensity, also play roles in the imaging process, but they do not determine image quality as directly as contrast and resolution do.