Conjugate-gradient preconditioning methods for shift-variant PET image reconstruction.
Jeffrey A. FesslerScott D. BoothPublished in: IEEE Trans. Image Process. (1999)
Keyphrases
- image reconstruction
- conjugate gradient
- inverse problems
- image reconstruction algorithms
- shift variant
- maximum a posteriori
- convergence rate
- training algorithm
- positron emission tomography
- computationally demanding
- super resolution
- support vector
- faster convergence
- shift invariant
- feature selection
- optimization methods
- point correspondences