Thermal interaction of multi-pulse laser beam with eye tissue during retinal photocoagulation: Analytical approach
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چکیده
منابع مشابه
Thermal Interaction between laser & tissue during retinal photocoagulation
The conventional retinal photocoagulation uses continuous wave (CW) lasers which results in pathophysiologic thermal environment to surrounding normal tissues such as neural retina, choroid, and photoreceptors. Selective photodamage of retinal pigment epithelium (RPE), thus sparing photoreceptors can be achieved by using short pulsed lasers. The problem associated with the usage of short pulsed...
متن کاملRetinal laser photocoagulation.
Since its discovery in the 1940s, retinal photocoagulation has evolved immensely. Although the first photocoagulators utilised incandescent light, it was the invention of laser that instigated the widespread use of photocoagulation for treatment of retinal diseases. Laser permits choice of electromagnetic wavelength in addition to temporal delivery methods such as continuous and micropulse mode...
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Shorter pulse durations help confine thermal damage during retinal photocoagulation, decrease treatment time and minimize pain. However, safe therapeutic window (the ratio of threshold powers for rupture and mild coagulation) decreases with shorter exposures. A ring-shaped beam enables safer photocoagulation than conventional beams by reducing the maximum temperature in the center of the spot. ...
متن کاملmechanisms of laser-tissue interaction: ii. tissue thermal properties
laser-tissue interaction is of great interest due to its significant application in biomedical optics in both diagnostic and treatment purposes. major aspects of the laser-tissue interaction which has to be considered in biomedical studies are the thermal properties of the tissue and the thermal changes caused by the interaction of light and tissue. in this review paper the effects of light on ...
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Visualizing retinal photocoagulation by real-time OCT measurements may considerably improve the understanding of thermally induced tissue changes and might enable a better reproducibility of the ocular laser treatment. High speed Doppler OCT with 860 frames per second imaged tissue changes in the fundus of enucleated porcine eyes during laser irradiation. Tissue motion, measured by Doppler OCT ...
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ژورنال
عنوان ژورنال: International Journal of Heat and Mass Transfer
سال: 2017
ISSN: 0017-9310
DOI: 10.1016/j.ijheatmasstransfer.2017.05.013