Optimal spatial resolution may be created using which of the following factors?

Optimal spatial resolution may be created using which of the following factors?

• A. Large focal spot
• B. Narrow pixel pitch
• C. Long OID
• D. Short SID

Answer: (B)

Spatial resolution hinges on how finely the image is sampled and how much blur is introduced by geometry. The detector’s pixel pitch sets the sampling interval; a smaller (narrow) pixel pitch means finer sampling and the ability to represent smaller details, which directly boosts spatial resolution. In contrast, a large focal spot creates more geometric blur, increasing unsharpness and lowering resolution. A long object-to-image distance (OID) increases magnification and blur, further reducing sharpness. A short source-to-image distance (SID) also raises geometric blur by reducing the distance over which the system can project a sharp image. So, the factor that best improves spatial resolution among these is a narrow pixel pitch.

Spatial resolution hinges on how finely the image is sampled and how much blur is introduced by geometry. The detector’s pixel pitch sets the sampling interval; a smaller (narrow) pixel pitch means finer sampling and the ability to represent smaller details, which directly boosts spatial resolution. In contrast, a large focal spot creates more geometric blur, increasing unsharpness and lowering resolution. A long object-to-image distance (OID) increases magnification and blur, further reducing sharpness. A short source-to-image distance (SID) also raises geometric blur by reducing the distance over which the system can project a sharp image. So, the factor that best improves spatial resolution among these is a narrow pixel pitch.