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Increasing film-focus distance (FFD) reduces radiation dose for x-ray examinations
Brennan, Patrick C.; McDonnell, S.; O'Leary, D. (2004-04-21)Increasing film-focus distance (FFD) from the traditional 100 cm has been shown to be an effective method of reducing dose whilst maintaining image quality. In particular, previous work increasing the FFD from 100 to 130 ...