What is the impact of sampling at less than 2x the grid frequency in CR/DR?

Sampling at less than double the grid frequency in computed radiography (CR) or digital radiography (DR) can lead to significant moiré artifacts in the final image. The moiré effect occurs when the sampling frequency aligns with the grid frequency, resulting in unwanted patterns or distortions that compromise the quality of the image. This is particularly important in radiographic imaging where precise details are crucial for diagnosis and assessment.

Moire artifacts can detract from the diagnostic value of an image by introducing false features that can confuse interpretation. As such, it is vital for practitioners to understand the relationship between sampling rates and grid frequencies to avoid these artifacts, ensuring that images remain clear and accurate for clinical evaluation.

In contrast, the other options do not directly relate to the consequences of inadequate sampling relative to grid frequencies and would not occur as a result of this sampling error. For instance, insufficient sampling does not enhance image resolution or improve image contrast, nor does it lead to image overexposure. Therefore, option B is the most accurate statement regarding the impact of sampling at frequencies less than twice the grid frequency.