UNIT-I PHYSICAL OPTICS, LASERS AND FIBER OPTICS- medical application of laser ppt pdf ,LASER A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation LASER full form "light amplification by stimulated emission of radiation" Characteristics of LASER i) monochromaticity, ii) directionality, iii) coherence and iv) brightness. Lasers and their Applications - IIT KanpurAnother medical application for lasers is in the treatment of skin conditions. Pulsed lasers can bleach certain types of tattoos as well as dark-red birthmarks called port-wine stains. Cosmetic lasertreatments include removing unwanted body hair and wrin-kles. 3.7 biomedical Imaging and superresolution
Laser power of 1 Watt means that 1 Joule of energy is emitted in 1 second. Frequency – Pulse Repetition Rate (Hz) Medical lasers are usually operated in a repetitive pulse mode. Laser pulses are emitted periodically at a pulse repetition rate, for example, 10 pulses per second. Hertz (Hz) is the most commonly used unit for pulses per second.
laser beam to determine the. distance to an object. The most common form of laser. rangefinder operates on the time. of flight principle by sending a laser. pulse in a narrow beam towards. the object and measuring the time. taken by the pulse to be reflected. off the target and returned to the.
delivering laser energy to or through the skin layer, it is important to consider the differences in skin color when determining laser of choice, delivery method, and power settings, as the differences in melanin content can impact delivery of energy. -Because of the relationship between monochromaticity of laser light and the chromophore of
expand the current uses within human medical and agricultural fields dramatically Further research necessary: Standardize spectrometers Form predictive equations Application of these capabilities to antibiotic residue detection in milk
Gas lasers in 1958 [7] and the first laser was constructed by Maiman in 2.1.1. Carbon dioxide laser. Invented in 1964 [12], the CO2 1960 [8]. He used a ruby crystal surrounded by flashtubes gas laser is still one of the most widely used medical lasers [16]. to generate population inversion and lasing.
medical lasers are related to operators, patients, and laser devices. The laser hazards are not limited only to the primary beam but also to non-beam exposure of the environment. The total number of reported acci-dents for the period 1984 to 1996 is 339, and this number is growing every year. These data are displayed in diagrams 1 and 2. The major
8. Laser Applications Helena Jelínková, Zden k Kluiber Introduction Laser radiation in various applications was made use of immediately after the first laser became operational. The ruby laser was designed and constructed by Teodor Maiman in 1960, and as early as 1961 its radiation was used to treat eye and skin diseases.
The term LASER is an abbreviation which stands for Light Amplification by Stimulated Emission of Radiation. The laser is a source of coherent, directional, monochromatic light that can be precisely focused into a small spot. The laser is a very useful tool for a wide variety of clinical diagnostic and therapeutic procedures.
for most applications in laser technology. The fully quantized theory is offered in Vol. VIII/1A2, Chap. 5. Part 2: Radiometry In the first section the definitions of the radiometric quantities and their measurement are sum-marized. In the second part the main elements of laser beam characterization are compiled with a
Laser power of 1 Watt means that 1 Joule of energy is emitted in 1 second. Frequency – Pulse Repetition Rate (Hz) Medical lasers are usually operated in a repetitive pulse mode. Laser pulses are emitted periodically at a pulse repetition rate, for example, 10 pulses per second. Hertz (Hz) is the most commonly used unit for pulses per second.
laser is one of a class of gas lasers using helium in conjunction. with a metal that vaporizes at a relatively lo w temperature. It. is weak and has a low efficiency ( < 0. 05%) and a lo w output ...
Medical Applications of Lasers. Lasers can reshape corneas, pulverize gallstones, ream arteries and kill tumors. Their increasing use in medicine is spurred by new technology and better understanding of the interaction of laser light with living tissue. Thomas F. Deutsch.
5012 Views Download Presentation. Laser Communication. Presented by, P.Anitha (08MCS204). Introduction . Laser communications systems are wireless connections through the atmosphere. Use Laser Beams to transmit information between two locations No fibres need, a wireless technology. Uploaded on Jul 13, 2014.
that of a laser with output power of 1mW (10-3 W). For calculation, we consider an imagery sphere of radius R of 1m for the light spreading of the bulb, laser beams illuminate a spot of circular area with a radius r = 1mm. 5 2 2 2 8 10 / 4 (100 ) 10 10 W cm cm W R W A P I bulb bulb = × − π 2 2 2 3 2 3 3 10 / (0.1 ) 10 W cm cm W A r P I ...
Presentation Transcript. LASER APPLICATIONS TO MEDICINE AND Prof. Dr. Moustafa. M. Mohamed Vice Dean Faculty of Allied Medical Science Pharos University Alexandria Dr. Yasser khedr Department of Medical Biophysics Pharos University. Types of lasers • According to the active material: solid-state, liquid, gas, excimer and semiconductor lasers.
Laser scar tissue blocking a shunt, or removing intra- based instruments are widely used in medical ventricular tumors. It can also be useful for removing applications. They are used in treatment of cancer, brain cysts. removal of tumors of vocal cords, brain surgery, plastic surgery, gynecology and oncology.
Laser Application in Periodontics Journal of Lasers in Medical Sciences Volume 3 Number 1 Winter 2012 29 others provide a surface ablation. CO 2, Er: YAG, and Er, Cr: YSGG laser radiation primarily affects superficial layers of the tissues and hence are advantageous, since the risk of damage to the underlying tissues are minimized. However, deeply
3m.i.k.r.o.n.™ represents an innovative and unique technology for the medical laser industry. It is the only technology for high power diode pumped mid-IR lasers which meets the needs of manufacturers and users regarding efficiency, reliability, maintenance and compactness of a laser solution.
The laser is among the most important inventions of the twentieth century. Since its introduction in 1960, the laser has made possible a countless number of scientific, medical, industrial, and commercial applications. Theodore Maiman, the inventor of the first working laser, was quoted by The New York Times in 1964 as calling the laser “a
• Helium neon –HeNe red (632.8nm) gas laser. • Pumped by electrical discharge. • CO 2 lasers (10.6mm). • Industrial & medical applications. • Research on increasing peak power at BNL. • uv excimer lasers –100 –300nm • Photolithography • Pumps for chemical reactions • Poisonous gases –chlorine, fluorine!
Presentation Transcript. LASER APPLICATIONS TO MEDICINE AND Prof. Dr. Moustafa. M. Mohamed Vice Dean Faculty of Allied Medical Science Pharos University Alexandria Dr. Yasser khedr Department of Medical Biophysics Pharos University. Types of lasers • According to the active material: solid-state, liquid, gas, excimer and semiconductor lasers.
Medical applications. 1. In medicine, micro surgery has become possible due to narrow angular spread of the laser beam. 2. It can be used in the treatment of kidney stone, tumour, in cutting and sealing the small blood vessels in brain surgery and retina detachment. 3. The laser beams are used in endoscopy. 4.
that of a laser with output power of 1mW (10-3 W). For calculation, we consider an imagery sphere of radius R of 1m for the light spreading of the bulb, laser beams illuminate a spot of circular area with a radius r = 1mm. 5 2 2 2 8 10 / 4 (100 ) 10 10 W cm cm W R W A P I bulb bulb = × − π 2 2 2 3 2 3 3 10 / (0.1 ) 10 W cm cm W A r P I ...
• Continuous power outputs up to 25 kW are obtainable hence this laser is the favoured choice for materials-processing applications such as cutting, welding and annealing. • Unlike most other gas lasers, the CO 2 has an appreciably high efficiency typically 10 to 15 %. • To reach the high powers required from these lasers, cavity lengths
