Optimum Distance Corresponds to Maximum permissible Radiation Dose in a medical  X-ray Room

A. Ismail, Khalid.

	Optimum Distance Corresponds to Maximum permissible Radiation Dose in a medical X-ray Room
Tikrit Journal of Pure Science
Article 1, Volume 13, Issue 3, 2008, Pages 181-187
Author
Khalid. A. Ismail
Abstract
Throughout thise research, the best distance was determined to get a dose which corresponds to the maximum permissible dose of exposure. The separate distance, between radiation source and the four walls of the X-ray room, was calculated. Accordingly, It was show that the maximum values of the separate distance occurs between the main wall (1) and radiation source with different distances. The occupation factor for this wall is T=0.0625. Then, becomes the separate distance of the second wall (2) from the radiation source which has T=1 occupation factor. These distances were increased according to the increase of the operation tube (I) and the real operation time when the beam directed towards the patient (U). Thus, the fitting process was done to prove that these curves are represent functions which submit to the inverse square law. The mathematical equation which describe these curves was determined. Finally, walls thickness were determined in two cases: The first case refers to walls which built of lead. The second one refers to walls which built of concrete. Using Concrete walls is better than the first type because lead walls contains a poisonous proportion of lead which affect human being health and the environment

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