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Evaluating a new generation of wearable high-density diffuse optical tomography technology via retinotopic mapping of the adult visual cortex
- Source :
- Neurophotonics
- Publication Year :
- 2021
- Publisher :
- SPIE-Intl Soc Optical Eng, 2021.
-
Abstract
- Significance: High-density diffuse optical tomography (HD-DOT) has been shown to approach the resolution and localization accuracy of blood oxygen level dependent-functional magnetic resonance imaging in the adult brain by exploiting densely spaced, overlapping samples of the probed tissue volume, but the technique has to date required large and cumbersome optical fiber arrays. Aim: To evaluate a wearable HD-DOT system that provides a comparable sampling density to large, fiber-based HD-DOT systems, but with vastly improved ergonomics. Approach: We investigated the performance of this system by replicating a series of classic visual stimulation paradigms, carried out in one highly sampled participant during 15 sessions to assess imaging performance and repeatability. Results: Hemodynamic response functions and cortical activation maps replicate the results obtained with larger fiber-based systems. Our results demonstrate focal activations in both oxyhemoglobin and deoxyhemoglobin with a high degree of repeatability observed across all sessions. A comparison with a simulated low-density array explicitly demonstrates the improvements in spatial localization, resolution, repeatability, and image contrast that can be obtained with this high-density technology. Conclusions: The system offers the possibility for minimally constrained, spatially resolved functional imaging of the human brain in almost any environment and holds particular promise in enabling neuroscience applications outside of the laboratory setting. It also opens up new opportunities to investigate populations unsuited to traditional imaging technologies.
- Subjects :
- Paper
Optical fiber
Visual perception
Computer science
Neuroscience (miscellaneous)
wearable
law.invention
law
medicine
functional near-infrared spectroscopy
Radiology, Nuclear Medicine and imaging
Computer vision
Radiological and Ultrasound Technology
business.industry
3D modeling
Research Papers
Diffuse optical imaging
Visualization
Functional imaging
Visual cortex
medicine.anatomical_structure
high-density diffuse optical tomography
Radiology Nuclear Medicine and imaging
short-separation regression
Functional near-infrared spectroscopy
visual stimuli
Artificial intelligence
business
Subjects
Details
- ISSN :
- 2329423X
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- Neurophotonics
- Accession number :
- edsair.doi.dedup.....3237e9957f02869a86c6c768ecb512ac