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TITLETITLE-- APPLICATION OFAPPLICATION OF

LASERSLASERS IN MEDICAL SECTORIN MEDICAL SECTOR

TERM PAPER

Presented by:-

DHRUV DHAWAN

B-TECH (ECE)

3RD SEMESTER

Amity School of Engineering

ROLL-NO-24

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CONTENTSCONTENTS

History

Introduction

Elements of laser

Laser parameters and tissueinteractions

Different applications

� Type of lasers used

Advantages

Conclusion

References

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LL Light

AA Amplification by

SS Stimulated

EE Emission of 

RRRadiation

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History of  LASERHistory of  LASER

y Invented in 1958 by

Charles Townes

(Nobel prize in

Physics 1964) andArthur Schawlow of 

Bell Laboratories.

y Originally called

MASER

REF- http//achievement.org

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INTRODUCTIONINTRODUCTION

y A laser is a device thattransforms light of various frequencies into a

chromatic radiation inthe visible, infrared, andultraviolet regions withall the waves in phasecapable of mobilizing

immense heat and powerwhen focused at closerange.

REF-http//popsci.com

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RUBY LASER

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Laser parameters and tissueLaser parameters and tissue

interactionsinteractions

Beam features: An important feature of most laser beamsused on the skin is the distribution of intensity across thebeam cross-section

1) Spot size: The energy and power density of thelaser beam depends on the size of the spot, being inverselyproportional to the square of the radius of the spot size..

2)Pul se dura tion: Laser light can be deliveredcontinuously or in a pulse mode. Continuous deliverycarries higher risk of damage to untargeted tissues

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DIFFERENT AREAS OFDIFFERENT AREAS OF

APPLICATIONS OF LASERSAPPLICATIONS OF LASERS

OPHTALMOLOGY

DENTISTRY

DERMATOLOGY

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OPHTALMOLOGYOPHTALMOLOGY

y LASIK or Lasik (laser-

assisted in situ

keratomileusis) is a type

of refractive surgery for

correcting myopia,

hyperopia, and

astigmatism.http//wikipedia.org

Ophthalmology is the

branch of medicine whichdeals with the physiology

and diseases of the eye.

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TYPE OF LASER USEDTYPE OF LASER USED

y

Excimer laser-is a form of ultraviolet laserwhich is commonly used in eye surgery

y An excimer laser typically uses a combination

of an inert gas (argon, or xenon) and a

reactive gas (fluorine or chlorine).

y Under  the condition of electrical stimulation,

a pseudo-molecule called an excimer is

created, which can only exist in an energizedstate and gives rise to laser light in the

ultraviolet range.

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DENTISTRYDENTISTRY

y Dentistry, is the

branch of medicine that

is involved in the

diagnosis, prevention,and surgical or non-

surgical treatment of 

diseases, disorders and

conditions of the oralcavity.

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DERMATOLOGYDERMATOLOGY

TYPE OF LASERSUSED:

CO2 laser.

Nd: YAG laser.

Diode laser.

y Dermatology is

the branch of 

medicine dealing

with the skin andits diseases.

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APPLICATIONS IN DERMATOLOGYAPPLICATIONS IN DERMATOLOGY

Laser skinresurfacing

Laserscar

removal

Laser tattooremoval

Laserhair

removal

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yy Diverse applications Diverse applications 

yy Less PainLess Pain

yy Eff icient Eff icient 

yyHigh Success RateHigh Success Rate

AD VANTAGES OF LASERS I N  

MED ICAL  SECTOR 

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WavelengthWavelength

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CONCLUSIONCONCLUSION

yMedicine has benefited enormously. The best-known medical application of the laser is in

eye surgery to repair detached retinas.

y

Medical research into the very foundations of life is being pursued by selectively destroying

minute cellular structures in cytoplasm to

determine their individual functions. Thus, the

laser has become an important new tool of geneticists.

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REFERENCESREFERENCES

y http://www.switched.com/2008/08/14/lasers-

eliminate-the-pain-of-the-dental-drill/

y http://www.laserclinicinfo.com/clinical_laser_treatments/clinical_laser_history.php

y Textbook of Endodontics (6th Ed.)² Ingle

y http://wikipedia.org

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THANK  THANK  

YOUYOU