Speaker
Description
This work aims to present a methodological and modeled way to extract, treat and apply physics in CT dosimetry studies to obtain relevant and statistical parameters such as absorbed dose, kvp and tube current. Anonymized Computed Tomography studies hosted in the various websites of medicine and nuclear medicine was used as a primary tool in order to employ the physics of attenuation of primary x-ray beams allowing estimations of low boundary absorbed dose, from Axial Head, Torso, Chest, Heart and whole body, took from legacy and contemporary CT scanners. Dicom files, the primarily source of extraction of CT scanner parameters, are discretization of a whole clinical study in computer files and they were the main source of DICOM Tags, which in turn gives us pixel matrices and manufacturer data of various computed tomographic procedures (metadata). Given the sophisticated and complex anatomy of the human body, physical approximation ( Beer- Lambert Law), along geometrical approximation and pixel matrices and manufacturer data collected from the tags were employed in the estimation of low bound absorbed dose of the CT procedures. Because the dose is customarily estimated from Ionization Chambers by observing the spectral distribution of electrons from ionized air molecules, this computational method is purely absent of physical interactions, being a no cost estimator method provided that the algoritm is used to analyse previous CT x-ray pixel image slices) by observing attenuation pixel mapping and manufacturer's tags parameters. The method showed consistent dose values from various Axial CT procedures as compared to known metadata from various studies.