Friday, January 28, 2011

What are the governing factors for exposure from particular Radioisotopes?

Ans: There are three factors for governing the exposure with a given kilovoltage for X- Ray or with the Gamma Ray from particular radioisotopes.

(A) Milliamperage (X-Ray) or source strength (for Gamma Ray)
(B) Focal spot to film distance or source to film distance
(C) Time of exposure

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