For example in routine Head CT, the mA (tube current) changes between 140mA to 350mA between scanners.
The "scout" series in these protocols changes between 3, 10, 30, 56, and up to 98 mA.
(For reference feel free to look at the AAPM Adult Routine Head CT protocols document)
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source https://www.reddit.com/r/Radiology/comments/hgszsn/reason_for_large_variability_in_ma_between/
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