Table 3.
Manufa cturer | AEC trade name | Image quality reference | Goal |
---|---|---|---|
General Electric | Auto mA, Smart mA | Noise index | Maintain a constant noise level (defined in noise index), using tube currents within prescribed minimum and maximum values |
Toshiba | SureExposure | Standard deviation (high quality, standard, low dose) |
Maintain a constant noise level (defined in standard deviation values for each protocol), using tube currents within preset minimum and maximum values |
Siemens | CARE Dose4D | Quality reference mAs | Maintain the same image quality (varying noise target for different attenuation level) with reference to a target effective mAs level for a standard- sized patient |
Philips | DoseRight | Reference image | Keep the same image quality as in the reference image, regardless of attenuation level |
AEC: Automatic exposure control; mAs: Product of tube current and rotation time.