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15 July 2015 Precision machining of pig intestine using ultrafast laser pulses
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Endoluminal surgery for the treatment of early stage colorectal cancer is typically based on electrocautery tools which imply restrictions on precision and the risk of harm through collateral thermal damage to the healthy tissue. As a potential alternative to mitigate these drawbacks we present laser machining of pig intestine by means of picosecond laser pulses. The high intensities of an ultrafast laser enable nonlinear absorption processes and a predominantly nonthermal ablation regime.

Laser ablation results of square cavities with comparable thickness to early stage colorectal cancers are presented for a wavelength of 1030 nm using an industrial picosecond laser. The corresponding histology sections exhibit only minimal collateral damage to the surrounding tissue. The depth of the ablation can be controlled precisely by means of the pulse energy. Overall, the application of ultrafast lasers to ablate pig intestine enables significantly improved precision and reduced thermal damage to the surrounding tissue compared to conventional techniques.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Rainer J. Beck, Wojciech S. Góra, Richard M. Carter, Sonny Gunadi, David Jayne, Duncan P. Hand, and Jonathan D. Shephard "Precision machining of pig intestine using ultrafast laser pulses", Proc. SPIE 9542, Medical Laser Applications and Laser-Tissue Interactions VII, 95421B (15 July 2015);


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