Details
| Original language | English |
|---|---|
| Title of host publication | Medical Laser Applications and Laser-Tissue Interactions VII |
| Editors | Ronald Sroka, Lothar D. Lilge |
| Publisher | SPIE |
| ISBN (electronic) | 9781628417074 |
| Publication status | Published - 2015 |
| Event | Medical Laser Applications and Laser Tissue Interactions VII - Munich, Germany Duration: 21 Jun 2015 → 23 Jun 2015 |
Publication series
| Name | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
|---|---|
| Volume | 9542 |
| ISSN (Print) | 1605-7422 |
Abstract
Laser surgery is an established clinical procedure in dental applications, soft tissue ablation, and ophthalmology. The presented experimental set-up for closed-loop control of laser bone ablation addresses a feedback system and enables safe ablation towards anatomical structures that usually would have high risk of damage. This study is based on combined working volumes of optical coherence tomography (OCT) and Er:YAG cutting laser. High level of automation in fast image data processing and tissue treatment enables reproducible results and shortens the time in the operating room. For registration of the two coordinate systems a cross-like incision is ablated with the Er:YAG laser and segmented with OCT in three distances. The resulting Er:YAG coordinate system is reconstructed. A parameter list defines multiple sets of laser parameters including discrete and specific ablation rates as ablation model. The control algorithm uses this model to plan corrective laser paths for each set of laser parameters and dynamically adapts the distance of the laser focus. With this iterative control cycle consisting of image processing, path planning, ablation, and moistening of tissue the target geometry and desired depth are approximated until no further corrective laser paths can be set. The achieved depth stays within the tolerances of the parameter set with the smallest ablation rate. Specimen trials with fresh porcine bone have been conducted to prove the functionality of the developed concept. Flat bottom surfaces and sharp edges of the outline without visual signs of thermal damage verify the feasibility of automated, OCT controlled laser bone ablation with minimal process time.
Keywords
- Ablation control, Automatic bone cutting, Er:YAG laser, OCT registration
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Materials Science(all)
- Biomaterials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Medicine(all)
- Radiology Nuclear Medicine and imaging
Cite this
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- Harvard
- Apa
- Vancouver
- BibTeX
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Medical Laser Applications and Laser-Tissue Interactions VII. ed. / Ronald Sroka; Lothar D. Lilge. SPIE, 2015. 95420P (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 9542).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Fast and automatic depth control of iterative bone ablation based on optical coherence tomography data
AU - Fuchs, Alexander
AU - Pengel, Steffen
AU - Bergmeier, Jan
AU - Kahrs, Lüder A.
AU - Ortmaier, Tobias
PY - 2015
Y1 - 2015
N2 - Laser surgery is an established clinical procedure in dental applications, soft tissue ablation, and ophthalmology. The presented experimental set-up for closed-loop control of laser bone ablation addresses a feedback system and enables safe ablation towards anatomical structures that usually would have high risk of damage. This study is based on combined working volumes of optical coherence tomography (OCT) and Er:YAG cutting laser. High level of automation in fast image data processing and tissue treatment enables reproducible results and shortens the time in the operating room. For registration of the two coordinate systems a cross-like incision is ablated with the Er:YAG laser and segmented with OCT in three distances. The resulting Er:YAG coordinate system is reconstructed. A parameter list defines multiple sets of laser parameters including discrete and specific ablation rates as ablation model. The control algorithm uses this model to plan corrective laser paths for each set of laser parameters and dynamically adapts the distance of the laser focus. With this iterative control cycle consisting of image processing, path planning, ablation, and moistening of tissue the target geometry and desired depth are approximated until no further corrective laser paths can be set. The achieved depth stays within the tolerances of the parameter set with the smallest ablation rate. Specimen trials with fresh porcine bone have been conducted to prove the functionality of the developed concept. Flat bottom surfaces and sharp edges of the outline without visual signs of thermal damage verify the feasibility of automated, OCT controlled laser bone ablation with minimal process time.
AB - Laser surgery is an established clinical procedure in dental applications, soft tissue ablation, and ophthalmology. The presented experimental set-up for closed-loop control of laser bone ablation addresses a feedback system and enables safe ablation towards anatomical structures that usually would have high risk of damage. This study is based on combined working volumes of optical coherence tomography (OCT) and Er:YAG cutting laser. High level of automation in fast image data processing and tissue treatment enables reproducible results and shortens the time in the operating room. For registration of the two coordinate systems a cross-like incision is ablated with the Er:YAG laser and segmented with OCT in three distances. The resulting Er:YAG coordinate system is reconstructed. A parameter list defines multiple sets of laser parameters including discrete and specific ablation rates as ablation model. The control algorithm uses this model to plan corrective laser paths for each set of laser parameters and dynamically adapts the distance of the laser focus. With this iterative control cycle consisting of image processing, path planning, ablation, and moistening of tissue the target geometry and desired depth are approximated until no further corrective laser paths can be set. The achieved depth stays within the tolerances of the parameter set with the smallest ablation rate. Specimen trials with fresh porcine bone have been conducted to prove the functionality of the developed concept. Flat bottom surfaces and sharp edges of the outline without visual signs of thermal damage verify the feasibility of automated, OCT controlled laser bone ablation with minimal process time.
KW - Ablation control
KW - Automatic bone cutting
KW - Er:YAG laser
KW - OCT registration
UR - http://www.scopus.com/inward/record.url?scp=84939489157&partnerID=8YFLogxK
U2 - 10.1117/12.2183695
DO - 10.1117/12.2183695
M3 - Conference contribution
AN - SCOPUS:84939489157
T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE
BT - Medical Laser Applications and Laser-Tissue Interactions VII
A2 - Sroka, Ronald
A2 - Lilge, Lothar D.
PB - SPIE
T2 - Medical Laser Applications and Laser Tissue Interactions VII
Y2 - 21 June 2015 through 23 June 2015
ER -