Question:


    III.A.6.     If the body entrance field size in an abdominal spot film is increased from 20 cm by 20 cm to 40 cm by 40 cm and no other factors are changed, the:

    a.     Entrance surface exposure (in roentgens) will increase by a factor of 4.

    b.     Total radiation energy imparted to the patient will increase by a factor of 4.

    c.     Amount of scattered radiation will increase.

    d.     Radiation will be less concentrated because it is spread over a larger area.





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