The X-ray is one of the most important compo- nents of medical technology. In the past few decades, X-radiation has been put into use for many purposes in medical science such as for therapy and diagnosis of human ailments1). Diagnostic radiology, a field of physical medicine uses X-rays to obtain functional and anatomical information about an individual’s body2). X-rays have been classified as carcinogenic by the International Agency for Research on Cancer (IARC) and Government of the United States3). Medical X-rays account for 0.6 to 3% of all types of cancers worldwide and at least 20% of cancer in developed countries4,5). Radiation in heavy doses has been proved to be lethal for cells, while in mild doses have been proved to damage the DNA of the exposed cells6). The DNA molecule may be damaged directly by interaction with ionizing radiation or indirectly by interaction with reactive products of the degradation of water by ionizing radiation7). Damage to DNA is regarded as the most important initiating step in the development of cancer and genetic diseases after exposure8).