Physics of radiation therapy, Physics

Physics of radiation therapy


The probability  of  your  having cancer during your lifetime is about 1 out of 4 .Currently three major methods are used alone or in combination to treat cancer:

Surgery, radiation therapy  and drugs (chemotherapy).


The success of radiation therapy depends on :
1-    The type and extent of cancer.
2-    The skill of radiotherapist.
3-    The physician who specialized in the treatment.
4-    The kind of radiation used in the treatment.
5-    The accuracy with which the radiation is administered to the tumor.
But because of the possibility of radiation –induced cancer ,it is generally safer to use other types of treatment when possible.

The dose units used in radiotherapy:

  Erythema dose: The quantity of  x-ray that caused a reddening of the skin.
  Rontgen: A unit based on ionization in air (only for x-ray and gamma ray).
  Rad: is defined as 100 ergs/g ,that is a radiation beam that gives 100 ergs of energy to 1 gm of tissue gives  the tissue an absorbed dose of 1 rad.
  Gray(Gy): it is the international (SI) unit of dose
    1Gy=1J/kg       since J=107 erg
     Gy =100 rad

Posted Date: 10/1/2012 7:41:33 AM | Location : United States







Related Discussions:- Physics of radiation therapy, Assignment Help, Ask Question on Physics of radiation therapy, Get Answer, Expert's Help, Physics of radiation therapy Discussions

Write discussion on Physics of radiation therapy
Your posts are moderated
Related Questions
the factors which decide the broad area of scientific activity ?

Explain Friction Force (Ffrict) Force exerted by a surface as an object moves across it or makes an effort to move across it. There are 2 parts of friction force - sliding and

describe and explain the operation of a transformer

Molecules: Let us take a piece of matter, for example, a drop of water and see what happens when it is sub-divided into smaller and smaller portions. The drop is first cut

In whole analog to the work energy theorem for the translator motion, it might be stated for rotational motion as:  Δ W rot =  K rot The net rotational work given by the force

These materials are used for permanent magnet manufacturing because of their low cost and their low weight. It consists of low iron oxide in combination with either barium carbonat

One side of impregnated paper capacitors is sprayed with metal.  When such paper is rolled, its gives higher capacitance for a given value. This capacitor has a self healing proper


obtain expression for potential at point due to uniformly chargeddisc

Define the cleaning effects of innovative proprietary ultrasonic technology. Additionally, the pollution particles are dispersed in the cleaning liquid. By this, a new adhesion