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
Consider a particle of energy E is incident from the left on a rectangular potential barrier of height and width and on both sides of this barrier at which means that no force act

Conventional Current: Earlier scientists had no knowledge of the concept of electron, so the developed the convention, still in use, , that the direction of current is for appo

Define about the Venting? A thermally insulated chamber is pumped down to an extremely low pressure. At a few point, the chamber is vented thus that it is filled with air up to

what is quatum number

why the blood come out of nose in the top of the mountain region?

Q. Compute the resistance of the filament of a 100W, 220 V electric bulbs. Power P = V 2 /R Resistance R = V 2 /P = (220 X 220)/ 100 = 484 ohm.

The equation of reflected wave for soft boundary: y(x.t)=A cos[(wt-kx)] The equation of reflected wave for rigid boundary: y(x.t)=A cos[(wt+kx)] where A=amplitude of the wave

Silver   Symbol     Ag Atomic weight 107.868  Atomic number   47 discovery


Presumptuous that it is understood that the object is in front of the mirror and anything on the other side of the mirror is behind the mirror is the following statement sufficient