Four types of phantoms designed for evaluation of CT-AEC performance.
? The image quality can be evaluated by noise and standard deviation on the phantom section images.
? Cone Phantom: evaluates performance of AEC for different patient sizes and gradual size changes in size along the axis
? Elliptical Cone Phantom: in combination with the Cone phantom facilitates evaluation of XY AEC
? Variable-XY Phantom: evaluates performance of XY AEC as cross section changes from circular to elliptical
? Stepped Phantom: evaluates the performance of the AEC to sudden changes in patient’s cross section