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6 March 2020 Strike rate: analysis of stone to fiber contact during popcorn laser lithotripsy (Conference Presentation)
Timothy Hall, Ali Aldoukhi, Khurshid Ghani, William Roberts
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Proceedings Volume 11212, Therapeutics and Diagnostics in Urology 2020; 112120C (2020) https://doi.org/10.1117/12.2544279
Event: SPIE BiOS, 2020, San Francisco, California, United States
Abstract
We devised a method to continuously measure the distance from fiber tip to stone surface based on the reflectance of an aiming beam back into the fiber during a popcorning scenario to determine how often the stone is close to the laser fiber when firing. Continuous light was coupled into a 200 µm fiber taped immediately next to the holmium fiber. Fibers were placed into a test tube with 5 BegoStones. Reflected light back into the fiber passed through the coupler to a biased photodiode. The fraction of time a stone was within 0.5 mm varied from 5%-18%.
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Timothy Hall, Ali Aldoukhi, Khurshid Ghani, and William Roberts "Strike rate: analysis of stone to fiber contact during popcorn laser lithotripsy (Conference Presentation)", Proc. SPIE 11212, Therapeutics and Diagnostics in Urology 2020, 112120C (6 March 2020); https://doi.org/10.1117/12.2544279
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KEYWORDS
Laser lithotripsy
Fiber lasers
Distance measurement
Holmium
Light emitting diodes
Reflectivity
Sensing systems
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