Noniterative sequential weighted least squares algorithm for positron emission tomography reconstruction

J Zhou, JL Coatrieux, L Luo - Computerized Medical Imaging and Graphics, 2008 - Elsevier
This paper proposes a new sequential weighted least squares (SWLS) method for positron
emission tomography (PET) reconstruction. The SWLS algorithm is noniterative and can be
considered as equivalent to the penalized WLS (PWLS) method under certain initial
conditions. However, a full implementation of SWLS is computationally intensive. To
overcome this problem, we propose a simplified SWLS as a reasonable alternative to the
SWLS. The performance of this SWLS method is evaluated in experiments using both …
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