نتایج جستجو برای: laser ablation

تعداد نتایج: 224148  

Journal: :Journal of analytical atomic spectrometry 2013
Prasoon K Diwakar Sivanandan S Harilal Nicole L LaHaye Ahmed Hassanein Pramod Kulkarni

Laser parameters, typically wavelength, pulse width, irradiance, repetition rate, and pulse energy, are critical parameters which influence the laser ablation process and thereby influence the LA-ICP-MS signal. In recent times, femtosecond laser ablation has gained popularity owing to the reduction in fractionation related issues and improved analytical performance which can provide matrix-inde...

2017
Wei Fan Sui Jian Yun Li Jian Hua Fu

PURPOSE To evaluate percutaneous laser ablation in treating benign thyroid nodules, we conducted a meta-analysis based on summarizing existing researches. MATERIALS AND METHODS A literature search for clinical trial was performed in PubMed, Cochrane Library and Excerpt Medica Database. The qualities of included studies were evaluated. We calculated the indexes with mean difference. Heterogene...

2016
Ravi Kumar Chittoria Devi Prasad Mohapatra Friji Meethale Thiruvoth Dinesh Kumar Arjun Asokan Vijayaraghavan Nandhagopal

Acne keloidalis nuchae (AKN) is a disease of unclear etiology that mainly affects males. Medical treatment of AKN is difficult, with refractory cases often requiring ablation by laser or surgical resection. We report herein, a 23-year-old male with refractory AKN treated successfully with combined laser ablation, using an 810-nm diode laser and a 1064-nm Nd:YAG laser.

Journal: :Optics letters 1992
A C Tam N Do L Klees P T Leung W P Leung

The threshold for explosive vaporization of a liquid layer on an opaque solid surface heated by an ultraviolet excimer pulsed laser is studied by a photoacoustic probe-beam deflection method. The probe beam traverses the liquid in the vicinity of the laser-heated liquid-solid interface. Below the explosion threshold, photoacoustic generation in the solid occurs only through a thermoelastic mech...

2015

Evolving research has demonstrated that surgical cytoreduction of a high-grade glial neoplasm is an important factor in improving the prognosis of these difficult tumors. Recent advances in intraoperative imaging have spurred the use of stereotactic laser ablation (laser interstitial thermal therapy [LITT]) for intracranial lesions. Among other targets, laser ablation has been used in the focal...

2011
Wes Williams Paola Nix Michael Bastiani

Laser axotomy followed by time-lapse microscopy is a sensitive assay for axon regeneration phenotypes in C. elegans(1). The main difficulty of this assay is the perceived cost ($25-100K) and technical expertise required for implementing a laser ablation system(2,3). However, solid-state pulse lasers of modest costs (<$10K) can provide robust performance for laser ablation in transparent prepara...

2014
Anthony Valenzuela Chase Munson Andrew Porwitzky Matthew Weidman Martin Richardson

Kerr self-focusing of high-power ultrashort laser pulses in atmosphere may result in a structure or structures of high intensity that can propagate over long distances with little divergence. Filamentation has garnered significant interest in the nonlinear optics community due to its unique properties. Salient features of filaments include a central region of intense laser power (greater than t...

2015
Massimo Vetrisano Camilla Colombo Massimiliano Vasile

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