Adaptively Tuned Iterative Low Dose CT Image Denoising

Algorithm 1

Proposed Iterative Regularization Parameter Updating.

Initialize: , : Soft tissue mask,

, , ,

while      Region II and   < maxiter  do,

 if    then

  increase    towards Region II,

  ,

  ,

 end if

 if  ⊂ Region III then

  decrease    towards Region II,

  ,

  ,

 end if

 , , ,

end while