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Bachelor/Master/PhD theses

Tobias Sauer, Master's thesis:
Calculating the organ-absorbed dose of patients for diverse source models of a medical CT scanner.

TU Illmenau, Institute of Biomedical Engineering and Informatics (BMTI) Braunschweig/Ilmenau, August 2015

Abstract

Calculating the effective dose absorbed by a patient after a CT examination requires exact knowledge of the X-ray source of the CT scanner used. For reasons of competition, such data are kept strictly secret by manufacturers. PTB has developed methods to deduce equivalent source models from measurements performed in the X-ray beam of a CT scanner. Within the scope of a Master’s thesis, investigations have now been conducted on whether such source models are sufficiently well-suited to calculating the effective dose absorbed by a patient.

Figure taken from the Master’s thesis: Example of the calculation of the dose absorbed by a patient having undergone a CT examination. Simulation results of the 3D dose distribution for thorax and abdomen imaging. The filter used was a large Al-equivalent bow-tie filter. Input image (left), image with overlapping input and dose (center) and dose image (right).