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- Total time x-rays are produced
- corresponds to total time high voltage applied to x-ray tube
Exposure Time & Radiographic Image
- Doubling exposure time
- Doubles time high voltage applied to x-ray tube
- Doubles time electrons strike target
- Doubles x-ray photons produced
- No effect on spectrum
- Doubling exposure time & halving mA results in
- Same number of electrons hitting target
- Same number of x-ray photons
- Same x-ray spectrum
- Same patient exposure
- Increased motion
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