The Physician Prescribes the AP/PA Field to Be Weighted 3:1

question 30

Multiple Choice

The physician prescribes the AP/PA field to be weighted 3:1 for the posterior field.How much dose is coming from the AP and the PA if total dose prescribed is 200 cGy?

• A) AP = 50 cGy,PA = 150 cGy
• B) AP = 75 cGy,PA = 125 cGy
• C) AP = 150 cGy,PA = 50 cGy
• D) AP = 175 cGy,PA = 25 cGy

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