This study integrates Diffuse Reflectance Spectroscopy (DRS) into spine surgery by incorporating optical fibers into awls, commonly used for pedicle cannulation. The sharp awl tip poses a challenge for incorporating parallel fibers at the distal end. Through Monte Carlo simulations and optical phantom experiments, we assess the influence of the extended tip on the optical signal and explore alternative slanted tip designs. Results show that the tip design affects the probed volume. While the extended tip impedes the detection of cortical breaches, the slanted layout maintains a consistent look-ahead distance beyond the awl tip. These important insights highlight the potential of slanted fiber-optic awls for accurate spine surgery.
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