A Pixel-Dependent Finite Element Model for Spatial Frequency Domain Imaging Using NIRFAST
Abstract
:1. Introduction
2. Theory
2.1. SFDI
2.2. NIRFAST
3. Methods and Results
3.1. SRS Semi-Infinite Model
3.2. SRS FEM Model
3.3. Structured Illumination
3.3.1. Homogenous Slab
- Generate the 3D mesh of desired optical properties and model the structured illumination, as described previously.
- Extract the model fluence from the mesh surface within the white bounding box of Figure 4 to obtain the SFDI 2D images, I(x,y).
- Demodulate to obtain the resulting demodulated images (AC/DC) for all frequencies of illumination using Equations (1) and (2).
- Calibrate using Equation (3) and a phantom simulation of known optical properties.
- Extract the optical properties using the pixel-independent model from Cuccia et al. [1]. The central nodal value from the bounding box surface is used for comparison.
3.3.2. Heterogenous Anomaly Slabs
4. Discussion
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Mellors, B.O.L.; Dehghani, H. A Pixel-Dependent Finite Element Model for Spatial Frequency Domain Imaging Using NIRFAST. Photonics 2021, 8, 310. https://0-doi-org.brum.beds.ac.uk/10.3390/photonics8080310
Mellors BOL, Dehghani H. A Pixel-Dependent Finite Element Model for Spatial Frequency Domain Imaging Using NIRFAST. Photonics. 2021; 8(8):310. https://0-doi-org.brum.beds.ac.uk/10.3390/photonics8080310
Chicago/Turabian StyleMellors, Ben O. L., and Hamid Dehghani. 2021. "A Pixel-Dependent Finite Element Model for Spatial Frequency Domain Imaging Using NIRFAST" Photonics 8, no. 8: 310. https://0-doi-org.brum.beds.ac.uk/10.3390/photonics8080310