نتایج جستجو برای: laser vaporization
تعداد نتایج: 184680 فیلتر نتایج به سال:
Objective: Cervical cancer is caused by human papilloma virus (HPV) infection, and cervical intraepithelial neoplasia (CIN) a precancerous lesion. Common treatments for CIN are conization laser vaporization. HPV testing useful predicting residual or recurrent disease after surgical treatment. We performed high-risk (HR-HPV) genotyping postoperatively to examine the positivity rate determine whe...
The rapid laser heating of materials beyond their boiling point has been associated with a variety interesting phenomena, such as supersaturated vapor formation and explosive evaporation. Here, we study the nanosecond pulsed Ag nanopyramids thin films deposited on quartz substrates under various fluids. Rapid in vacuum demonstrated that large fraction vaporized material was redeposited onto sub...
DB Apfelberg. Ultrapulse carbon dioxide laser resurfacing and facial cosmetic surgery. Can J Plast Surg 1995;3(3):133-136. Over 100 patients have been treated with the ultrapulse carbon dioxide laser since July 1994. The high power square wave pulse of 600 watts at less than 1 msec (which is less than the thermal relaxation time of tissue) dissipates heat during vaporization, thus producing a `...
Laser shock processing (LSP) is an innovative surface treatment technique with high peak power, short pulse, and cold hardening for strengthening metal materials. LSP is based on the application of a high intensity pulsed laser beam (I > 1 GW/cm(2); t < 50 ns) at the interface between the metallic target and the surrounding medium (a transparent confining material, normally water) forcing a sud...
The search for a minimally invasive approach to the treatment of Lower Urinary Tract Symptoms (LUTS) suggestive of Benign Prostatic Hyperplasia (BPH) is probably as old as Transurethral Resection of the Prostate (TURP). In an effort to overcome the limitations and morbidities of TURP, and in light of evidence suggesting that medical treatment for BPH has a limited life-span, laser-based treatme...
Application of picosecond and femtosecond laser pulses to the controlled ablation of materials represents a relatively unexplored yet important topic in laser processing. Such ultrashort pulses are of potential value in areas of thin-film deposition, micromachining, and surgical procedures. We report here some early results of systematic studies being done from the femtosecond to the nanosecond...
any change in the refractive index of a laser active medium can lead to serious degradation of beam quality, laser beam modes, laser performance and variation in the intensity distribution. alteration in the refractive index of laser active medium is especially notable in high power lasers. it is clear that in the laser beam production, the pumping agent induces a great amount of heat which...
Aim: We retrospectively compared and evaluated the safety, efficacy, 1-year outcomes of 200-W Thulium laser vaporization prostate (ThuVAP) GreenLight high-performance system (HPS) 120-W for benign prostatic hyperplasia (BPH). Methods: Between February 2019 December 2021, 137 patients with lower urinary tract symptoms secondary to BPH underwent ThuVAP. October 2014 April 2019, 233 HPS (HPS-PVP)....
Purpose: to assess the effectiveness of carbon dioxide laser light in treatment benign skin neoplasms. Material and methods. The researchers have analyzed outcomes 1394 patients treated for In main group (n = 1184), photocoagulation (vaporization) photohydraulic preparation were applied. Laser surgical devices “Lancet-1” “Lancet-2” continuous pulsed modes, power up 20 W, focused beam 1 mm used....
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