Quadratic regularization design for 2D CT

Quadratic regularization design for 2D CT. Shi, H. R. & Fessler, J. A. IEEE Trans. Med. Imag., 28(5):645–56, May, 2009.
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@ARTICLE{shi:09:qrd,
 author = {H. R. Shi and J. A. Fessler},
 title = {Quadratic regularization design for {2D} {CT}},
 journal = {{IEEE Trans. Med. Imag.}},
 volume = 28,
 number = 5,
 pages = {{645--56}},
 month = may,
 pmc = 2911484,
 pm = 19272993,
 errata = {In (33), should be tan^{-1}(s/D_sd).  In (40), the \Phi should be \phi.
After (40), we divide by \rho *and multiply by \rho* so there should
be another \rho in front of d\rho.  In the same equation the phase term should
be written F^j(\rho,\phi) to be consistent with (40).
After (44) the integral should be dr' d\phi' not dr d\phi.
In (15), j depends on (n,m) so to take the FT to get (19) we must assume that
the r_j^l factors are locally independent of j(n,m).
},
 doi = {10.1109/TMI.2008.2007366},
 year = 2009
}

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