Optimization of optode arrangements for diffuse optical tomography: A singular-value analysis

Area of Science:

• Biomedical optics
• Medical imaging
• Image reconstruction

Background:

• Diffuse optical tomography (DOT) is a promising imaging modality.
• Optimizing DOT instrument resolution is crucial for accurate image reconstruction.
• Current methods for resolution assessment and optimization require enhancement.

Purpose of the Study:

• To develop a novel method for optimizing the spatial resolution of diffuse optical tomographic instruments.
• To introduce singular-value analysis of the tomographic weight matrix as a measure of image resolution.
• To demonstrate the utility of this method in optimizing device configuration for breast imaging.

Main Methods:

• Singular-value decomposition (SVD) of the tomographic weight matrix was employed.
• A resolution measure based on SVD was defined and monitored.
• Device parameters, including spatial sampling interval and field-of-view, were optimized in a parallel-plane transmission geometry.
• Resolution was compared between transmission and remission geometries.

Main Results:

• Singular-value analysis effectively quantifies image resolution for DOT instruments.
• Optimization of spatial sampling and field-of-view significantly improved image resolution.
• Transmission geometry demonstrated comparable or superior resolution to remission geometry in specific configurations.

Conclusions:

• The proposed singular-value analysis method provides a robust approach to optimizing DOT instrument resolution.
• This method facilitates enhanced image quality in diffuse optical tomography.
• The findings are particularly relevant for advancing diffuse optical breast imaging technologies.