A novel waveguide design that produces an elongated laser beam output for soft tissue ablation

Optik ◽  
2018 ◽  
Vol 164 ◽  
pp. 561-566 ◽  
Author(s):  
Nurul Syahirah Aziz Jaafar ◽  
Suhaila Sepeai ◽  
Kok-Sing Lim ◽  
Muhammad Khairol Annuar Zaini ◽  
Harith Ahmad ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Laser Beam ◽  
Tissue Ablation ◽  
Beam Output ◽  
Waveguide Design

Soft Tissue Ablation by a Novel Mid-IR Laser

2018 ◽  
Author(s):  
V. A. Arkhipova ◽  
A.A. Kovalenko ◽  
V.A. Vinnichenko ◽  
V.A. Tyrtyshniy ◽  
I.V. Yaroslavsky
Keyword(s):  
Soft Tissue ◽  
Tissue Ablation ◽  
Ir Laser

In Vitro Genesis of Subaxial Cervical Unilateral Facet Dislocations Through Sequential Soft Tissue Ablation

Spine ◽  
2001 ◽  
Vol 26 (12) ◽  
pp. 1317-1323 ◽  
Author(s):  
Ernst Sim ◽  
Alexander R. Vaccaro ◽  
Andrea Berzlanovich ◽  
Nikolaus Schwarz ◽  
Barbara Sim
Keyword(s):  
Soft Tissue ◽  
Tissue Ablation

Avoiding Complications in Bone and Soft Tissue Ablation

2016 ◽  
Vol 40 (2) ◽  
pp. 166-176 ◽  
Author(s):  
A. Nicholas Kurup ◽  
Grant D. Schmit ◽  
Jonathan M. Morris ◽  
Thomas D. Atwell ◽  
John J. Schmitz ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Tissue Ablation

Soft tissue ablation by picosecond synchronously-pumped CdSiP 2 -based optical parametric oscillator tuned to 6.45 μm

2011 ◽  
Author(s):  
Nordine Hendaoui ◽  
Alaa Addin Mani ◽  
Ernest Kakudgi ◽  
André Peremans ◽  
Christophe Silien ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Optical Parametric Oscillator ◽  
Parametric Oscillator ◽  
Tissue Ablation ◽  
Optical Parametric ◽  
Synchronously Pumped

scholarly journals Distinguishing Biology from Geology in Soft-Tissue Preservation

2014 ◽  
Vol 20 ◽  
pp. 275-288 ◽  
Author(s):  
John A. Cunningham ◽  
Philip C. J. Donoghue ◽  
Stefan Bengtson
Keyword(s):  
Soft Tissue ◽  
Laser Beam ◽  
Evolutionary History ◽  
Soft Tissues ◽  
Analytical Techniques ◽  
Tissue Preservation ◽  
Deep Time ◽  
X Ray ◽  
Soft Tissue Preservation

Knowledge of evolutionary history is based extensively on relatively rare fossils that preserve soft tissues. These fossils record a much greater proportion of anatomy than would be known solely from mineralized remains and provide key data for testing evolutionary hypotheses in deep time. Ironically, however, exceptionally preserved fossils are often among the most contentious because they are difficult to interpret. This is because their morphology has invariably been affected by the processes of decay and diagenesis, meaning that it is often difficult to distinguish preserved biology from artifacts introduced by these processes. Here we describe how a range of analytical techniques can be used to tease apart mineralization that preserves biological structures from unrelated geological mineralization phases. This approach involves using a series of X-ray, ion, electron and laser beam techniques to characterize the texture and chemistry of the different phases so that they can be differentiated in material that is difficult to interpret. This approach is demonstrated using a case study of its application to the study of fossils from the Ediacaran Doushantuo Biota.

Comparison of a blue diode laser with Ho:YAG, Tm fiber, and KTP lasers for soft tissue ablation

2018 ◽  
Author(s):  
V. A. Vinnichenko ◽  
A. A. Kovalenko ◽  
V. A. Arkhipova ◽  
I. V. Yaroslavsky ◽  
G. B. Altshuler
Keyword(s):  
Soft Tissue ◽  
Diode Laser ◽  
Tissue Ablation ◽  
Blue Diode Laser

Mathematical Models for Analyzing Tissue Ablation Using Short Pulse Lasers

2009 ◽  
Author(s):  
Ogugua Onyejekwe ◽  
Amir Yousef Sajjadi ◽  
Ugur Abdulla ◽  
Kunal Mitra ◽  
Michael Grace
Keyword(s):  
Temperature Distribution ◽  
Laser Beam ◽  
Heat Equation ◽  
Surface Temperature ◽  
Mathematical Models ◽  
Short Pulse ◽  
Ablation Depth ◽  
Tissue Ablation ◽  
Surface Temperature Distribution ◽  
Short Pulse Laser

Mathematical modeling of biological tissue ablation performed using a short pulse laser and the corresponding experimental analysis is of fundamental importance to the understanding and predicting the temperature distribution and heat affected zone for advancing surgical application of lasers. The objective of this paper is to use mathematical models to predict the thermal ablated zones during irradiation of freshly excised mouse skin tissue samples by a novel approach using a focused laser beam from a short pulse laser source. Suggested mathematical model is Stefan kind free boundary problem for the heat equation in unknown region. Temperature of the skin satisfies the classical heat equation subjected to Neumann boundary condition on the known boundary, while along the time-dependent unknown boundary, which characterizes the ablation depth, two conditions are met: (1) temperature is equal to the ablation temperature and (2) classical Stefan condition is satisfied. The latter expresses the conservation of energy at the ablation moment. A method of integral equations is used to reduce the Stefan problem to a system of two Volterra kind integral equations for temperature and ablation depth. MATLAB is used subsequently for the numerical solution. Experiments are performed using two lasers—a diode laser having a wavelength of 1552 nm and pulsewidth of 1.3 ps. The surface temperature distribution is measured using an imaging camera. After irradiation, histological studies of laser irradiated tissues are performed using frozen sectioning technique to determine the extent of thermal damage caused by the laser beam. The ablation depth and width is calculated based on the interpolated polygon technique using image processing software. The surface temperature distribution and the ablation depth obtained from the mathematical models are compared with the experimental measurements and are in very good agreement. A parametric study of various laser parameters such as time-average power, pulse repetition rate, pulse energy, and irradiation time is performed to determine the necessary ablation threshold parameters.

Ultra-short pulsed laser tissue ablation using focused laser beam

2008 ◽  
Author(s):  
Megan K. Jaunich ◽  
Shreya Raje ◽  
Kunal Mitra ◽  
Michael S. Grace ◽  
Molly Fahey ◽  
...  
Keyword(s):  
Laser Beam ◽  
Pulsed Laser ◽  
Tissue Ablation

Infrared laser soft tissue ablation versus ultraviolet excimer laser

1993 ◽  
Vol 76 (4) ◽  
pp. 425-432 ◽  
Author(s):  
Michael Leukauf ◽  
Angelo Tro¨dhan ◽  
Michael Kautzky ◽  
Martin Susani ◽  
Hubert Porteder
Keyword(s):  
Soft Tissue ◽  
Excimer Laser ◽  
Infrared Laser ◽  
Tissue Ablation
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