Abstract
This work presents a long-range and extended depth-of-focus optical coherence tomography (OCT) system using a Bessel-like beam (BLB) as a visual feedback system during laser osteotomy. We used a swept-source OCT system (λ c = 1310 nm) with an imaging range of 26.2 mm in the air, integrated with a high energy microsecond Er:YAG laser operating at 2.94 µm. We demonstrated that the self-healing characteristics of the BLB could reduce the imaging artifacts that may arise during real-time monitoring of laser ablation. Furthermore, the feasibility of using long-range OCT to monitor a deep laser-induced incision is demonstrated.
Highlights
Osteotomy is a surgical intervention involving cutting, etching, shaving, and/or chipping of the bone
We showed that image artifacts that may arise during laser ablation could be reduced by using Bessel-like beam (BLB) in the optical coherence tomography (OCT) system due to the BLB’s self-healing nature
This study demonstrated the feasibility of using a long-range optical coherence tomography system to provide visual feedback during laser osteotomy
Summary
Osteotomy is a surgical intervention involving cutting, etching, shaving, and/or chipping of the bone. Laser osteotomy is a contactless and potentially minimally invasive technology for bone surgery, providing freedom along with the cutting geometry and high precision [4,5,6,7,8]. One technical drawback of using lasers for osteotomy is the lack of depth feedback and the missing feedback in the type of tissue being cut currently [9]. Without this information, there is a risk of damaging the critical structure in the vicinity. Several optical and acoustics methods have been proposed to monitor the depth and shape of the cuts during laser surgery [10,11,12,13,14,15,16,17]
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