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METHOD FOR RADIATION DOSE REDUCTION USING PRIOR IMAGE CONSTRAINED IMAGE RECONSTRUCTION
METHOD FOR RADIATION DOSE REDUCTION USING PRIOR IMAGE CONSTRAINED IMAGE RECONSTRUCTION
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机译:利用先前图像约束图像重建的辐射剂量减少方法
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摘要
A method for reconstructing an image of a subject with a medical imaging system is provided. Image data is acquired with the medical imaging system, typically in an undersampled manner. A prior image constrained compressed sensing (PICCS] image reconstruction method is then implemented to reconstruct images of the subject being imaged. The prior image used in such a method is produced from so-called averaged image data. The averaged image data is produced by effectively averaging signal information associated with a plurality of different slice locations along a direction orthogonal to the plane parallel to the slice locations. Weightings are calculated from images reconstructed in a conventional manner from the acquired image data, and these weightings are employed to produce the averaged image data. By producing a prior image in this manner, a higher signal-to-noise ratio is achievable, allowing trade¬ offs with factors such as radiation dose in x-ray imaging.
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