Instrumentation and calibration protocol for imaging dynamic features in dense-scattering media by optical tomography

Area of Science:

• Biomedical Optics
• Medical Imaging Technology
• Optical Instrumentation

Background:

• Acquiring time-series optical data from complex tissue geometries at high sampling rates presents significant challenges.
• Existing instrumentation may have limitations in speed, detector capabilities, or adaptability to arbitrary sample shapes.

Purpose of the Study:

• To describe novel instrumentation for multisource, multidetector, time-series optical data acquisition.
• To detail the design, calibration, and performance of both a CCD-camera-based and a silicon-photodiode-based system.
• To present reconstructed images from laboratory studies using the developed instrumentation.

Main Methods:

• Development of a multisource, multidetector optical instrument capable of high sampling rates (up to 150 Hz).
• Detailed design rationale and calibration protocols for the optical data acquisition system.
• Utilized a Charge-Coupled Device (CCD) camera-based system for initial data acquisition and image reconstruction.

Main Results:

• The described instrumentation is suitable for acquiring time-series optical data from tissues with arbitrary geometries.
• Performance features of the CCD-camera-based system were measured and documented.
• Representative images were successfully reconstructed from laboratory data, demonstrating system capability.

Conclusions:

• The presented instrumentation effectively addresses the need for high-speed optical data acquisition in complex biological tissues.
• The developed systems, including the new silicon-photodiode-based approach, show promise for advanced biomedical imaging.
• The successful reconstruction of images validates the utility of the instrumentation for optical data studies.