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Research Papers: Therapeutic

Cavitation effect of holmium laser pulse applied to ablation of hard tissue underwater

[+] Author Affiliations
Tao Lü

Huazhong University of Science and Technology, College of Optoelectronics Science and Engineering, Wuhan National Laboratory for Optoelectronics, Wuhan, China 430074 and China University of Geosciences, School of Mathematics and Physics, Wuhan, China 430074

Qing Xiao

Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectrics, Wuhan, China 430074

Danqing Xia, Kai Ruan, Zhengjia Li

Huazhong University of Science and Technology, College of Optoelectrics Science and Engineering, Wuhan National Laboratory for Optoelectronics, Wuhan, Hubei, 430074 China

J. Biomed. Opt. 15(4), 048002 (August 05, 2010). doi:10.1117/1.3470092
History: Received May 03, 2010; Revised May 31, 2010; Accepted June 02, 2010; Published August 05, 2010; Online August 05, 2010
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To overcome the inconsecutive drawback of shadow and schlieren photography, the complete dynamics of cavitation bubble oscillation or ablation products induced by a single holmium laser pulse [2.12μm, 300μs (FWHM)] transmitted in different core diameter (200, 400, and 600μm) fibers is recorded by means of high-speed photography. Consecutive images from high-speed cameras can stand for the true and complete process of laser-water or laser-tissue interaction. Both laser pulse energy and fiber diameter determine cavitation bubble size, which further determines acoustic transient amplitudes. Based on the pictures taken by high-speed camera and scanned by an optical coherent microscopy (OCM) system, it is easily seen that the liquid layer at the distal end of the fiber plays an important role during the process of laser-tissue interaction, which can increase ablation efficiency, decrease heat side effects, and reduce cost.

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© 2010 Society of Photo-Optical Instrumentation Engineers

Citation

Tao Lü ; Qing Xiao ; Danqing Xia ; Kai Ruan and Zhengjia Li
"Cavitation effect of holmium laser pulse applied to ablation of hard tissue underwater", J. Biomed. Opt. 15(4), 048002 (August 05, 2010). ; http://dx.doi.org/10.1117/1.3470092


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