Fast variance prediction for iteratively reconstructed CT images with locally quadratic regularization. Schmitt, S. M., Goodsitt, M. M., & Fessler, J. A. IEEE Trans. Med. Imag., 36(1):17–26, January, 2017.
doi  bibtex   
@ARTICLE{schmitt:17:fvp,
 author = {S. M. Schmitt and M. M. Goodsitt and J. A. Fessler},
 title = {Fast variance prediction for iteratively reconstructed {CT} images with locally quadratic regularization},
 journal = {{IEEE Trans. Med. Imag.}},
 volume = 36,
 number = 1,
 pages = {{17--26}},
 month = jan,
 pm = 27448342,
 pmc = 5217761,
 nihmsid = 824231,
 errata = {The weighting befor (9) should be $Y_i$ not $1/Y_i$.},
 doi = {10.1109/TMI.2016.2593259},
 year = 2017
}

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