CT beam dosimetric characterization procedure for personalized dosimetry.

CT beam dosimetric characterization procedure for personalized dosimetry. Phys Med Biol. 2019 Mar 11;: Authors: Rosendahl S, Bueermann L, Borowski M, Kortesniemi M, Sundell VM, Kosunen A, Siiskonen T Abstract Personalized dosimetry in computed tomography (CT) can be realized by a full Monte Carlo (MC) simulation of the scan procedure. Essential input data needed for the simulation are appropriate CT x-ray source models and a model of the patients body which is based on the CT image. The purpose of this work is to develop comprehensive procedures for the determination of CT x-ray source models and their verication by comparison of calculated and measured dose distributions in physical phantoms. Mobile equipment together with customized software was developed and used for non-invasive determination of equivalent source models of CT scanners under clinical conditions. Standard and physical anthropomorphic CT dose phantoms equipped with real-time CT dose probes at five representative positions were scanned. The accumulated dose was measured during the scan at the five positions. ImpactMC, a MC-based CT dose software program, was used to simulate the scan. The necessary inputs were obtained from the scan parameters, from the equivalent source models and from the material-segmented CT images of the phantoms. 3D dose distributions in the phantoms were simulated and the dose values calculated at the five positions inside the phantom were compared to measured dos...
Source: Physics in Medicine and Biology - Category: Physics Authors: Tags: Phys Med Biol Source Type: research

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Source: The Journal of Invasive Cardiology - Category: Cardiology Tags: J Invasive Cardiol Source Type: research
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Source: Biomed Res - Category: Research Authors: Tags: Adv Biomed Res Source Type: research
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Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
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Source: Nuclear Medicine Communications - Category: Nuclear Medicine Tags: Original Articles Source Type: research
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