A Monte Carlo model for absorbed dose calculations in computed tomography.
A Monte Carlo program has been devised that estimates the total absorbed energy and mean dose in defined regions within phantoms exposed to rotating x-ray sources. The calculations deal with fanlike beams of rectangular cross section projected onto elliptic cylindrical phantoms, which may be inhomogeneous. The effects of coherent scattering, which may be significant in a narrow-beam geometry, can be studied. The code can score the exit flux, allowing study of the relationship between dose and image quality. The model is described, the code is verified, and typical results are presented.
D008962:Models, Theoretical; D009010:Monte Carlo Method; D011829:Radiation Dosage; D014057:Tomography, X-Ray Computed