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A computer program for organ dose calculation for patients undergoing computed tomography examinations

Wednesday, October 26, 2011 — Poster Session III

10:00 a.m. – Noon

Natcher Conference Center




  • C Lee
  • KP Kim
  • D Long
  • SL Simon
  • A Bouville
  • W Bolch


A computer program, called NCICT, was developed to provide a convenient graphical user interface-based dose calculation tool for patients undergoing computed tomography (CT) examinations. First, x-ray beams generated from a Siemens CT scanner was modeled using technical parameters obtained from manufacturer, and incorporated into the Monte Carlo scanner model which was then validated by experimental measurements. Second, patient anatomy was modeled by employing patient CT images as well as hybrid technique, the most advanced mathematical format to model sophisticated human anatomy. A total of 12 hybrid phantoms were developed and incorporated into the organ dose calculations: newborn, 1, 5, 10, 15, and adult male and female individuals. Third, a comprehensive organ dose database was established by coupling Monte Carlo CT scanner model with the series of hybrid phantoms within the Monte Carlo program. The organ dose database covers six age groups, two genders, three tube potentials, whole body from the top of the head to the bottom of the feet, and two filtrations. The final organ dose database was incorporated into the computer program, NCICT. User can calculate doses for a total of 33 organs and tissues by entering the parameters of patient and CT examinations.

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