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← ScienceWhich consequence results when isotopic composition decays inside radiotherapy equipment?
A)Exposure time requires recalculation adjustment✓
B)Shielding material cracks propagate faster
C)Coolant experiences accelerated thermal breakdown
D)Focusing lens exhibits reduced particle resolution
💡 Explanation
Recalculation becomes essential because radioactive decay alters nuclide activity via nuclear disintegration, a decline best described by exponential decay; therefore, treatment times become inaccurate, rather than affecting the machine's structure or peripherals under typical radiotherapy equipment condition regimes.
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