Image reconstruction in fluorescence molecular tomography with sparsity-initialized maximum-likelihood expectation maximization. 2018

Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA.

We present a reconstruction method involving maximum-likelihood expectation maximization (MLEM) to model Poisson noise as applied to fluorescence molecular tomography (FMT). MLEM is initialized with the output from a sparse reconstruction-based approach, which performs truncated singular value decomposition-based preconditioning followed by fast iterative shrinkage-thresholding algorithm (FISTA) to enforce sparsity. The motivation for this approach is that sparsity information could be accounted for within the initialization, while MLEM would accurately model Poisson noise in the FMT system. Simulation experiments show the proposed method significantly improves images qualitatively and quantitatively. The method results in over 20 times faster convergence compared to uniformly initialized MLEM and improves robustness to noise compared to pure sparse reconstruction. We also theoretically justify the ability of the proposed approach to reduce noise in the background region compared to pure sparse reconstruction. Overall, these results provide strong evidence to model Poisson noise in FMT reconstruction and for application of the proposed reconstruction framework to FMT imaging.

UI MeSH Term Description Entries

Related Publications

Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
November 2018, Medical & biological engineering & computing,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
October 2007, Optics express,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
October 2005, Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
January 1987, IEEE transactions on medical imaging,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
March 2018, Radiology and oncology,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
November 2023, Computers in biology and medicine,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
May 2001, IEEE transactions on medical imaging,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
September 2011, Optics express,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
March 1992, Journal of nuclear medicine : official publication, Society of Nuclear Medicine,
Yansong Zhu, and Abhinav K Jha, and Dean F Wong, and Arman Rahmim
June 2008, IEEE transactions on image processing : a publication of the IEEE Signal Processing Society,
Copied contents to your clipboard!