What is the new mas needed to maintain the same exposure

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A technologist performs a procedure using 70kV at 40 mAs at 40 inches SID collimated to 14x17 (field size) and now needs to collimate to 11x14, what is the new mAs needed to maintain the same exposure/density? Then using the new mAs for 11x14 what new mAs to maintain the density when collimating to a 10x12 field size?

Reference no: EM133587126

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