A non-uniform image receptor (IR) will demonstrate which of the following?

A non-uniform image receptor (IR) will demonstrate which of the following?

• A. Decreased exposure response
• B. Decreased spatial resolution
• C. Decreased contrast
• D. Increased pixelation

Answer: (A)

Non-uniform image receptors have varying sensitivity across the detector surface, so the same X-ray exposure does not produce the same brightness in every area. This makes the relationship between exposure and pixel value inconsistent across the image, diminishing the overall exposure response. In other words, the image no longer responds uniformly to exposure because some regions under- or over-respond due to detector nonuniformity. This is different from changes in sharpness (spatial resolution), grayscale differences that define contrast, or the apparent blockiness from sampling (pixelation), which are not the primary consequence of detector nonuniformity.

Non-uniform image receptors have varying sensitivity across the detector surface, so the same X-ray exposure does not produce the same brightness in every area. This makes the relationship between exposure and pixel value inconsistent across the image, diminishing the overall exposure response. In other words, the image no longer responds uniformly to exposure because some regions under- or over-respond due to detector nonuniformity. This is different from changes in sharpness (spatial resolution), grayscale differences that define contrast, or the apparent blockiness from sampling (pixelation), which are not the primary consequence of detector nonuniformity.