Control of Organ and Tissue Doses to Patients During Computed Tomography

Computed tomography is a dose-intensive type of medical imaging. Radiation doses to the patient during Computed tomography are estimated using Monte-Carlo simulations. Reference computational phantoms of adult human are used for this purpose. The simulation takes into account the parameters of radiation and the position of the beam relative to phantom. Medical radiation is often highly anisotropic and is collimated only to the area of interest. The effect from exposure of critical organs and tissues to radiation is not characterized by sole effective dose. The modern methods of estimation of the doses to patients during Computed Tomography are reviewed. According to preliminary calculations, the expected effect from the bowtie filter is much lower than expected.