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How the systems work
In order to set mA, systems need knowledge of patient attenuation. This comes from:
- SPR (scout, pilot, topogram or scanogram) views and/or
- Knowledge of the attenuation from the previous rotation
To use the system, the operator needs to be able to set the desired exposure level by use of:
- A ‘standard’ mAs
- A reference image of the desired image quality
- A desired image noise level