Improving vascular imaging with co-planar mutually guided photoacoustic and diffuse optical tomography: a simulation...

Area of Science:

• Biomedical Imaging
• Optical Physics
• Medical Physics

Background:

• Diffuse optical tomography (DOT) offers low spatial resolution due to light scattering.
• Photoacoustic tomography (PAT) provides high resolution but struggles with absolute absorption quantification due to unknown light fluence.
• Accurate tissue optical property mapping is crucial for various biomedical applications.

Purpose of the Study:

• To develop a mutually-guided imaging system for simultaneous DOT and PAT measurements.
• To improve the accuracy of DOT and PAT by leveraging complementary information.
• To enable quantitative mapping of tissue absorption and scattering coefficients.

Main Methods:

• A novel imaging system integrating DOT and PAT was designed for simultaneous data acquisition.
• A mutual guidance strategy was implemented where DOT guides PAT reconstruction and PAT guides DOT.
• Digital phantoms were used for extensive simulations to validate the proposed methodology.

Main Results:

• The proposed mutually-guided system achieved fast and simultaneous measurements of tissue absorption maps.
• The system demonstrated improved accuracy in reconstructing absorption coefficients compared to standalone methods.
• Estimation of tissue scattering maps was successfully performed using the combined absorption data.

Conclusions:

• The mutually-guided DOT and PAT system effectively enhances quantitative optical imaging of tissues.
• This approach overcomes limitations of individual modalities, providing accurate absorption and scattering maps.
• The developed technique shows significant potential for advancing functional tissue imaging and analysis.