Question

For x-ray tube shielding, the leakage cannot exceed _____ mGy at _____ meters away from the focal spot.

a) 0.1 mGy; 1 m
b) 0.5 mGy; 1 m
c) 1 mGy; 1 m
d) 0.1 mGy; 2 m

Answer 1

For x-ray tube shielding, the leakage cannot exceed 1 mGy at 1 meter away from the focal spot, making option c) the correct answer.

Step-by-step explanation:

The question pertains to the regulatory standards for x-ray tube shielding. For x-ray tube shielding, the allowable leakage according to most standards, including the U.S. Food and Drug Administration's Center for Devices and Radiological Health, cannot exceed 1 mGy per hour at 1 meter away from the x-ray source or the focal spot of the x-ray tube. This is to ensure that individuals who are in proximity to x-ray machines, but are not the subject of the x-ray themselves, are not exposed to unnecessary radiation. The correct answer to the question is option c), which is 1 mGy at 1 meter away from the focal spot.