Long-range optical coherence tomography with extended depth-of-focus: a visual feedback system for smart laser osteotomy

Arsham Hamidi; Yakub A Bayhaqi; Ferda Canbaz; Alexander A Navarini; Philippe C Cattin; Azhar Zam

doi:10.1364/BOE.414300

Long-range optical coherence tomography with extended depth-of-focus: a visual feedback system for smart laser osteotomy

Biomed Opt Express. 2021 Mar 16;12(4):2118-2133. doi: 10.1364/BOE.414300. eCollection 2021 Apr 1.

Authors

Arsham Hamidi^{1

2}, Yakub A Bayhaqi¹, Ferda Canbaz¹, Alexander A Navarini³, Philippe C Cattin⁴, Azhar Zam^{1

5}

Affiliations

¹ Biomedical Laser and Optics Group (BLOG), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland.
² arsham.hamidi@unibas.ch.
³ Digital Dermatology, Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland.
⁴ Center for medical Image Analysis and Navigation (CIAN), Department of Biomedical Engineering, University of Basel, CH-4123 Allschwil, Switzerland.
⁵ azhar.zam@unibas.ch.

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.