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Spatial resolution

Small focal spot, long SID, short OID, no motion, and small detector elements give sharp detail.

The rule

Spatial resolution is the ability to show small, closely spaced structures as separate, with sharp edges. Film texts called it recorded detail. Five things control it: focal spot size, SID, OID, motion, and the size of the detector elements. kVp and mAs do not directly control it.

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