Which of the following factors would not indicate the need for a grid?
higher kVp
a thicker part
increased SID
increased OID
increased SID
Rationale: A grid is suggested with parts measuring over 10 cm and with higher kVp. Increased kVp values influence the amount of scatter radiation produced. In cases where increased OID is a factor with a thicker part, the theory of the air-gap technique could apply, avoiding the need for a grid.
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