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Notes:


As we have seen over the past few days, automatic exposure controls, or AECs, on CT scanners are a topic of great interest, with systems now available from all the major CT vendors.
Each of these systems works on slightly different basis, and they use a range of control methods for their operation.
Their overall aim is to control image quality and radiation dose in a repeatable and predictable way, by changing the x-ray tube current.
This study uses a custom made phantom in order to assess the image quality performance of each of the AECs on 16 slice CT scanners