نتایج جستجو برای: pulse dye laser

تعداد نتایج: 298718  

Journal: Iranian Journal of Dermatology 2010
Ehsani Amir Hooshang Farnaghi Farshad Fateh Soheil Noormohammadpoor Pedram Seirafi Hassan

Background: Although cryotherapy is still the first-line therapy for solar lentigines, due to side effects such as post-inflammatory hyperpigmentation (PIH), especially in patients with darker skin types, pigment specific lasers should be considered as initial treatment. The aim of this study was to evaluate the efficacy and safety of cryotherapy in comparison with 595-nm pulsed dye laser (PDL)...

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Journal: :Actas dermo-sifiliograficas 2007
A Harto I García-Morales P Belmar P Jaén

INTRODUCTION Acne vulgaris is a multifactorial disease of the pilosebaceous unit characterized by the development of inflammatory (papules, pustules, cysts) and/or non inflammatory lesions (open and closed comedones) that may progress to scars. The increase of bacterial resistances, adverse effects and teratogenicity of retinoids and lack of response to usual therapies have led to investigate n...

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ژورنال: پژوهش فیزیک ایران 2012
اسفندیاری, عبدالرسول, ایرانی, شلیر, حکیمی‌پژوه, حسین,

In this study, we considered the self-focusing of a Gaussian laser pulse in an unmagnetized plasma. The equation of plasma density evolution that includes the electrons ponderomotive force is obtained. Then an equation for the width of laser pulse with a relativistic mass correction term is derived. This term is proportional to the electrons temperature. It is shown that in the large width limi...

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ژورنال: پژوهش فیزیک ایران 2013
ایرانی, شلیر , حبیبی, مهدی , حکیمی پژوه, حسین,

 We have considered the self-focusing of a Gaussian laser pulse in unmagnetized plasma. High-intensity electromagnetic fields cause the variation of electron density in plasma. These changes in the special conditions cause the acceleration of electrons to the higher energy and velocities. Thus the equation of plasma density evolution was obtained considering the electrons ponderomotive force. T...

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Journal: :journal of lasers in medical sciences 0
farahnaz arbabzadeh zavareh department of restorative dentistry, school of dentistry and dental research center, isfahan university of medical sciences, isfahan, iran pouran samimi department of restorative dentistry, school of dentistry and dental research center, isfahan university of medical sciences, isfahan, iran reza birang department of periodontics dentistry, school of dentistry and dental research center, isfahan university of medical sciences, isfahan, iran massoumeh eskini general dental practices, isfahan, iran stephane ayoub bouraima laser application in medical sciences research center, shahid beheshti university of medical sciences, tehran, iran

introduction: the use of laser for cavity preparation or conditioning of dentin and enamel surfaces as an alternative for dental tissue acid-etch have increased in recent years. the aim of this in vitro study was to compare microleakage at enamel-composite and dentincomposite interfaces following erbium-doped yttrium aluminum garnet(er:yag) laser conditioning or acid-etching of enamel and denti...

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ژورنال: پژوهش فیزیک ایران 2019
Abedi-Varaki, M, Jafari, S,

In this paper, the self-focusing property of an intense circularly polarized laser pulse in hot magnetized plasma is investigated theoretically. First, an envelope equation governing the spot-size of the laser beam for both left- and right-hand polarizations has been derived in the presence of a planar wiggler. Furthermore, non-linear dispersion relation of laser pulse is obtained by using Maxw...

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1998
J Hochberger S Mühldorfer J Maiss E G Hahn C Ell

Introduction—Laser lithotripsy of bile duct stones has become a widely accepted endoscopic treatment modality for giant, impacted, or very hard stones. The procedure is usually carried out under direct endoscopic control in view of the potential risk of bile duct injuries in “blind” laser application. Aims—To investigate the use of a rhodamine 6G laser lithotriptor with an integrated optical st...

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Journal: :Gut 1998
J Hochberger J Bayer A May S Mühldorfer J Maiss E G Hahn C Ell

INTRODUCTION Laser lithotripsy of bile duct stones has become a widely accepted endoscopic treatment modality for giant, impacted, or very hard stones. The procedure is usually carried out under direct endoscopic control in view of the potential risk of bile duct injuries in "blind" laser application. AIMS To investigate the use of a rhodamine 6G laser lithotriptor with an integrated optical ...

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Journal: :Dermatologica Sinica 2017

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2017
G. Petite P. Agostini C. K. Wu

2014 We present a simple design for obtaining high-intensity, Fourier limited picosecond pulses. A Nd : Yag picosecond laser is used to synchronously pump a dye oscillator/amplifier system. The dye oscillator is of the Littman type. Up to 1.5 mJ of energy is obtained in a 20 ps pulse with a bandwidth of 30 GHz after amplification. Revue Phys. Appl. 20 (1985) 527-530 JUILLET 1985, 1

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