Abstract
We reported here the concepts, applications and side effects of radiotherapy on the human tissue. The properties of x and γ rays, and their applications on the tumor tissues such as radiation therapy, gamma camera and gamma Knife are presented. Further, the physics of laser and its applications such as photo-coagulation, photo-vaporization, photo-chemical ablation, laser surgery, laser in dentistry, laser in ophthalmology and laser in hemoglobin are also mentioned. Moreover, the side effects of those radiations on the normal tissues of the human body are discussed. On the other hand, the different methods of medical imaging such as radiography, computed tomography, fluoroscopy, magnetic resonance imaging (MRI) and nuclear magnetic imaging (NMI) are presented.

Keywords
Radiotherapy; Gamma knife; Medical Imaging and Laser Surgery

Cite this paper
A.Sedky, Ahmed Abdel-Rahim, Eslam Sedky, Short Essay on Concepts, Applications and Side Effects of Radiation on the Human Tissue , SCIREA Journal of Clinical Medicine. Volume 1, Issue 2, December 2016 | PP. 146-182.

References

[ 1 ]	Taylor A, Powell ME, Intensity-Modulated Radiotherapy, Cancer Imaging 2004; 4(2):68–73.
[ 2 ]	Gaspar LE, Ding M, A review of Radiation Therapy, Current Oncology Reports 2008; 10(4):294–299.
[ 3 ]	Detorie NA. Helical tomotherapy, A new Tool for Radiation Therapy, Journal of the American College of Radiology 2008; 5(1):63–66.
[ 4 ]	4. Fenwick JD, Tomé WA, Soisson ET, Seminars in Radiation Oncology (2006); 16(4):199–208.
[ 5 ]	Schulz-Ertner D, Jäkel O, Schlegel W, Radiation Therapy with charged particles. Seminars in Radiation Oncology (2006),16(4):249–259.
[ 6 ]	X-ray, (3rd ed.), Oxford University Press. September (2005).
[ 7 ]	L'Annunziata, Michael F. (2007); Radioactivity: introduction and history.
[ 8 ]	Magnetic Resonance, a critical peer-reviewed introduction". European Magnetic Resonance Forum. Retrieved 17 November (2014).
[ 9 ]	Gould, R. Gordon (1959). "The LASER, Light Amplification by Stimulated Emission of Radiation", p. 128.
[ 10 ]	F. J. Duarte, Tunable Laser Optics, 2nd Edition (CRC, New York, 2015).
[ 11 ]	Bertolotti, Mario (2004), The History of the Laser, Institute of Physics. ISBN 0-7503-0911-3.
[ 12 ]	Csele, Mark (2004). Fundamentals of Light Sources and Lasers. Wiley. ISBN 0-471-47660-9.
[ 13 ]	Svelto, Orazio (1998), Principles of Lasers. 4th ed. Trans. David Hanna. Springer. ISBN 0-306-45748-2.
[ 14 ]	Wilson, J. & Hawkes, J.F.B. (1987), Lasers: Principles and Applications. ISBN 0-13-523697-5.