Which option presents a correct set of factors that affect spatial resolution in digital radiography?

Which option presents a correct set of factors that affect spatial resolution in digital radiography?

• A. Detector element (DEL) size, Detector element (DEL) pitch, Fill factor
• B. milliampere-seconds (mAs), Detector element (DEL) size, Fill factor
• C. Detector element (DEL) pitch, mAs, DEL size
• D. milliampere-seconds (mAs), Exposure latitude, Fill factor

Answer: (A)

Spatial resolution in digital radiography is about how finely the image details can be distinguished, which is governed by how the detector is constructed and how it collects signal. The size of each detector element sets the smallest feature that can be resolved—the smaller the element, the finer the detail you can image. The distance between elements, or the detector element pitch, affects how densely the image is sampled; smaller pitch means more samples per area and better representation of detail. The fill factor, the proportion of each element that is actively sensing x-rays, matters because a higher fill factor reduces dead space and blurring at the element boundaries, improving sharpness and the system’s ability to reproduce fine detail (MTF). milliampere-seconds and exposure latitude influence image brightness, noise, and the range of exposures that produce acceptable images, but they do not directly determine how finely details are resolved.

Spatial resolution in digital radiography is about how finely the image details can be distinguished, which is governed by how the detector is constructed and how it collects signal. The size of each detector element sets the smallest feature that can be resolved—the smaller the element, the finer the detail you can image. The distance between elements, or the detector element pitch, affects how densely the image is sampled; smaller pitch means more samples per area and better representation of detail. The fill factor, the proportion of each element that is actively sensing x-rays, matters because a higher fill factor reduces dead space and blurring at the element boundaries, improving sharpness and the system’s ability to reproduce fine detail (MTF).

milliampere-seconds and exposure latitude influence image brightness, noise, and the range of exposures that produce acceptable images, but they do not directly determine how finely details are resolved.