Reconstruction method for fluorescence molecular tomography based on L1-norm primal accelerated proximal gradient.

Area of Science:

• Biomedical Imaging
• Medical Physics
• Computational Biology

Background:

• Fluorescence Molecular Tomography (FMT) is crucial for preclinical tumor imaging, enabling 3D visualization of fluorescent probes in small animals.
• Current FMT reconstruction methods often suffer from poor robustness and efficiency due to the ill-posed nature of the problem.

Purpose of the Study:

• To develop a novel and improved FMT reconstruction method.
• To enhance the robustness, accuracy, and efficiency of FMT image reconstruction.

Main Methods:

• Proposed a new FMT reconstruction method integrating primal accelerated proximal gradient (PAPG) descent with L1-norm regularized projection (L1RP).
• The PAPG method was employed for efficient solution of the search point, followed by L1RP for robust and accurate reconstruction.

Main Results:

• Simulation experiments demonstrated superior robustness, accuracy, and efficiency compared to existing methods.
• Phantom and in vivo mouse experiments confirmed the method's potential for practical applications in preclinical imaging.

Conclusions:

• The proposed PAPG descent and L1RP-based FMT reconstruction method offers significant advantages over conventional approaches.
• This method shows promise for advancing preclinical tumor imaging and related research.