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Related Experiment Video

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Fabrication and Characterization of Optical Tissue Phantoms Containing Macrostructure
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Reconstruction of optical properties using a diffusion model for interstitial diffuse optical tomography.

Ken Kang-Hsin Wang1, Timothy C Zhu1

  • 1Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104.

Proceedings of Spie--The International Society for Optical Engineering
|May 19, 2015
PubMed
Summary
This summary is machine-generated.

An interstitial diffuse optical tomography (iDOT) system accurately maps prostate optical properties during photodynamic therapy (PDT). This technology aids in real-time treatment monitoring and improved therapeutic outcomes.

Keywords:
DOTPhotodynamic therapydiffusion therapyoptical propertiesreconstruction

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Area of Science:

  • Biomedical Engineering
  • Medical Physics
  • Optical Imaging

Background:

  • Photodynamic therapy (PDT) requires precise monitoring of tissue optical properties for effective treatment.
  • Characterizing prostate optical properties in vivo is crucial for optimizing PDT efficacy.
  • Existing methods for optical property assessment may lack the spatial resolution or invasiveness needed for prostate applications.

Purpose of the Study:

  • To develop and validate an interstitial diffuse optical tomography (iDOT) system for characterizing prostate optical properties during PDT.
  • To assess the system's ability to reconstruct absorption and reduced scattering coefficients.
  • To evaluate the potential of iDOT for real-time monitoring of prostate PDT.

Main Methods:

  • Development of a continuous-wave (CW) iDOT system with multiple light diffusers and isotropic detectors inserted into the prostate.
  • Utilizing a motorized system for sequential data acquisition.
  • Solving the inverse problem using an adjoint model based on the CW diffusion equation to reconstruct optical properties.

Main Results:

  • Successful reconstruction of absorption and reduced scattering coefficient images using 2D and 3D mathematical prostate phantoms with known optical properties.
  • Demonstrated accuracy in mapping optical property distributions within the phantoms.
  • Validation of the iDOT methodology for characterizing tissue optical properties.

Conclusions:

  • The developed iDOT system is capable of characterizing prostate optical properties during PDT.
  • The methodology shows promise for real-time treatment monitoring and guiding PDT.
  • Further investigation is needed for reconstruction using human patient data.