Which of the following will increase spatial resolution?
1) Increase in SID
2) Increase in OID
3) Decrease in focal spot size

Question

Quizplus · Accepted Answer

Increasing the SID (source-to-image receptor distance) would decrease magnification and improve image sharpness, but increasing the OID (object-to-image receptor distance) would increase magnification and decrease spatial resolution. Decreasing the focal spot size would also improve spatial resolution by reducing penumbra (blurring) of the image. Therefore, the correct answer is 1 and 3 only, as they both would increase spatial resolution.

Which of the Following Will Increase Spatial Resolution