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Journal of Biomedical Optics

Cavitation effect of holmium laser pulse applied to ablation of hard tissue underwater
Author(s): Tao Lu; Qing Xiao; Danqing Xia; Kai Ruan; Zhengjia Li
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Paper Abstract

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.

Paper Details

Date Published: 1 July 2010
PDF: 8 pages
J. Biomed. Opt. 15(4) 048002 doi: 10.1117/1.3470092
Published in: Journal of Biomedical Optics Volume 15, Issue 4
Show Author Affiliations
Tao Lu, Huazhong Univ. of Science and Technology (China)
Qing Xiao, Britton Chance Ctr. for Biomedical Photonics (China)
Danqing Xia, Huazhong Univ. of Science and Technology (China)
Kai Ruan, Huazhong Univ. of Science and Technology (China)
Zhengjia Li, Huazhong Univ. of Science and Technology (China)


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