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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Effective dose in radiation at 1 m is 4 Gy; at 4 m it will be:
assistant
The correct answer is  Intensity of an X-ray beam is inversely proportional to the square of the distance between the source and the point of measure. When the distance from the focal spot is doubled, the intensity of the beam decreases to one quarter.