Print Email Facebook Twitter Diffuse reflectance spectroscopy of the spine: improved breach detection with angulated fibers Title Diffuse reflectance spectroscopy of the spine: improved breach detection with angulated fibers Author Losch, M.S. (TU Delft Medical Instruments & Bio-Inspired Technology) Kardux, Famke (Student TU Delft) Dankelman, J. (TU Delft Medical Instruments & Bio-Inspired Technology) Hendriks, B.H.W. (TU Delft Medical Instruments & Bio-Inspired Technology; Philips Research) Date 2023 Abstract Accuracy in spinal fusion varies greatly depending on the experience of the physician. Real-time tissue feedback with diffuse reflectance spectroscopy has been shown to provide cortical breach detection using a conventional probe with two parallel fibers. In this study, Monte Carlo simulations and optical phantom experiments were conducted to investigate how angulation of the emitting fiber affects the probed volume to allow for the detection of acute breaches. Difference in intensity magnitude between cancellous and cortical spectra increased with the fiber angle, suggesting that outward angulated fibers are beneficial in acute breach scenarios. Proximity to the cortical bone could be detected best with fibers angulated at θf = 45° for impending breaches between θp = 0° and θp = 45°. An orthopedic surgical device comprising a third fiber perpendicular to the device axis could thus cover the full impending breach range from θp = 0° to θp = 90°. To reference this document use: http://resolver.tudelft.nl/uuid:acb9f316-1e90-48db-8869-2689f61a0463 DOI https://doi.org/10.1364/BOE.471725 ISSN 2156-7085 Source Biomedical Optics Express, 14 (2), 739-750 Part of collection Institutional Repository Document type journal article Rights © 2023 M.S. Losch, Famke Kardux, J. Dankelman, B.H.W. Hendriks Files PDF boe_14_2_739.pdf 3.82 MB Close viewer /islandora/object/uuid:acb9f316-1e90-48db-8869-2689f61a0463/datastream/OBJ/view