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Optoacoustic Tissue Classification for Laser Osteotomes using a Fiber Bragg Grating
We want to develop a fiber based laser with feedback system which guarantees for extremely precise cuts of almost all shapes in minimal invasive surgery.
Keywords: Optoacoustics; Sensors; Optics.
BLOG (Biomedical Laser and Optics Group) develops a fiber based laser with feedback system which guarantees for extremely precise cuts of almost all shapes in minimal invasive surgery. Currently, bone saws can only achieve medium precision, which is connected to relatively reduced implant stability and relatively longer recovery times. BLOG´s fiber laser will enable controlled contactless bone ablation leading to faster bone healing and less thermal damage compared to conventional mechanical osteotomes. To further extend the advantages of laserosteotomes over conventional osteotomes, also real-time opto-acoustical feedback sensor on type of tissues being cut would be desirable to immediately shut down the laser in case there is no bone tissue left to cut.
BLOG (Biomedical Laser and Optics Group) develops a fiber based laser with feedback system which guarantees for extremely precise cuts of almost all shapes in minimal invasive surgery. Currently, bone saws can only achieve medium precision, which is connected to relatively reduced implant stability and relatively longer recovery times. BLOG´s fiber laser will enable controlled contactless bone ablation leading to faster bone healing and less thermal damage compared to conventional mechanical osteotomes. To further extend the advantages of laserosteotomes over conventional osteotomes, also real-time opto-acoustical feedback sensor on type of tissues being cut would be desirable to immediately shut down the laser in case there is no bone tissue left to cut.
The aim of this master thesis project is to ablate hard and soft bone, muscle, fat and skin tissues using an nanosecond Nd:YAG laser at 532 nm and/or a microsecond pulsed Er:YAG laser at 2.94 μm. The student will measure the emitted acoustic shock wave using an optoacoustic sensor-based Fiber Bragg grating system. He will also compare the performances of principal component analysis (PCA) combined with a Mahalanobis distance method and the one for PCA combined with cubic support vector machine method using both lasers. Other methods for tissue classifications are also welcome. An alternative will be to use the fiber Perot sensor.
The aim of this master thesis project is to ablate hard and soft bone, muscle, fat and skin tissues using an nanosecond Nd:YAG laser at 532 nm and/or a microsecond pulsed Er:YAG laser at 2.94 μm. The student will measure the emitted acoustic shock wave using an optoacoustic sensor-based Fiber Bragg grating system. He will also compare the performances of principal component analysis (PCA) combined with a Mahalanobis distance method and the one for PCA combined with cubic support vector machine method using both lasers. Other methods for tissue classifications are also welcome. An alternative will be to use the fiber Perot sensor.