What are three factors that affect spatial resolution in digital radiography?

What are three factors that affect spatial resolution in digital radiography?

• A. DEL material, exposure time, and kVp
• B. DEL size, DEL pitch, and fill factor
• C. Focal spot size, SID, and OID
• D. DEL size, DEL pitch, and fill factor

Answer: (D)

Spatial resolution in digital radiography is about how finely the image can show details, and in digital detectors that clarity is set by how the detector samples the scene. The size of each detector element determines the smallest feature that can be distinguished: smaller elements capture finer details, while larger ones smear them. The spacing between adjacent elements, the pitch, affects how densely the image is sampled; a smaller pitch means the detector can represent finer structures with less gap, whereas a larger pitch introduces sampling gaps that reduce sharpness. The fill factor—the portion of each detector element that is actually sensitive to X-rays—matters because a higher fill factor means more of the incident signal is captured within the element, improving the ability to transfer fine detail into the image without losing information in the dead areas. While other factors like focal spot size or the geometry of the scene can contribute to blur, the detector’s element size, pitch, and fill factor are the primary determinants of spatial resolution in digital radiography.

Spatial resolution in digital radiography is about how finely the image can show details, and in digital detectors that clarity is set by how the detector samples the scene. The size of each detector element determines the smallest feature that can be distinguished: smaller elements capture finer details, while larger ones smear them. The spacing between adjacent elements, the pitch, affects how densely the image is sampled; a smaller pitch means the detector can represent finer structures with less gap, whereas a larger pitch introduces sampling gaps that reduce sharpness. The fill factor—the portion of each detector element that is actually sensitive to X-rays—matters because a higher fill factor means more of the incident signal is captured within the element, improving the ability to transfer fine detail into the image without losing information in the dead areas. While other factors like focal spot size or the geometry of the scene can contribute to blur, the detector’s element size, pitch, and fill factor are the primary determinants of spatial resolution in digital radiography.