Acemoglu Alperen, Leonardo Mattos S
Annu Int Conf IEEE Eng Med Biol Soc. 2018 Jul;2018:3660-3663. doi: 10.1109/EMBC.2018.8513055.
The use of laser scanners in soft tissue microsurgery results in high quality ablations with minimal thermal damage to surrounding tissue. However, current scanner technologies for microsurgery are limited to free-beam lasers, requiring direct line-of-sight from outside the patient to the surgical site. Developing compact laser manipulation systems is crucial to introduce laser scanning capabilities in hard-toreach surgical sites. Recently, we developed a magnetic laser scanner as a tip module of an endoscopic system. The device provides 2D position control and fast scanning of a laser beam. In this work, the previous prototype is revised to enable its use with a CO laser source. The advantages of non-contact tissue ablations with fast scanning are discussed with comparative tissue ablation experiments coupling the system with a $CO_{2$ laser source. Results show that the magnetic laser scanner provides narrower ablations and less thermal damage compared to ablations performed with a bare flexible waveguide. These results highlight the potential of the proposed technology to improve soft tissue ablation quality in hard-to-reach surgical sites.
在软组织显微手术中使用激光扫描仪可实现高质量的消融，同时对周围组织的热损伤最小。然而，目前用于显微手术的扫描仪技术仅限于自由光束激光器，需要从患者体外直接看向手术部位。开发紧凑的激光操纵系统对于在难以到达的手术部位引入激光扫描能力至关重要。最近，我们开发了一种磁性激光扫描仪作为内窥镜系统的尖端模块。该设备可提供激光束的二维位置控制和快速扫描。在这项工作中，对先前的原型进行了改进，使其能够与CO激光源配合使用。通过将该系统与CO₂激光源耦合进行比较组织消融实验，讨论了快速扫描的非接触组织消融的优点。结果表明，与使用裸露的柔性波导进行的消融相比，磁性激光扫描仪提供的消融范围更窄，热损伤更小。这些结果突出了所提出技术在难以到达的手术部位改善软组织消融质量的潜力。
