MEDRADSC 2X03 Lecture Notes - Lecture 2: Radiobiology, Radiography, Radiation Therapy
17 Mar 2018
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Document Summary
Unit 1 : introductory concepts of radiation protection and biology. Taken in 1895 first pubic x ray image. Definition: the study of the action of ionizing radiation on living things. There are different forms of ionizing radiation: more energy= high frequency, affects interaction with tissues. Control: quality received by pts, body regions irradiated consequences, conditions (energy, rate, environment, minimize detriment to pt, maximize benefit of use. The annual outdoor effective dose () from cosmic radiation for canada and the u. s. Magnetic field surrounding the earth deflects the radiation aeay from the equator and to the poles. Van allan belt more radiation exposure at north and sound poles. Hamilton elevation: 100-200 meters above sea level (0-1000 feet, nanticoke coal fired power plant. Diagnostic procedures: x ray, nuclear medicine (both diagnostic and therapeutic) Therapeutic procedures: radiation therapy, radiopharmaceutical therapy. Medical devices: pacemakers, arterial stents (beta particles) We don"t know for sure no known safe level. Little knowledge about effects of low doses.
