Introduction
Radiation is best described as energy which is passing through space or a medium (Khan 2010). There are two categories of radiation; non-ionizing and ionizing radiation. Non-ionizing radiation is important in the life systems and can be exemplified by heat, visible light, or radio waves; however, overexposure may be toxic. Ionizing radiation is the one commonly implied whenever the term radiation is used. Ionizing radiation has enough energy to change atoms which may result in changes in cell molecules leading to alterations within the cells and thus cell damage. Radiation is measured by the unit, rem, which is ‘roentgen equivalent ...
