Author, as appears in the article.: Maria Cros, Raoul M S Joemai, Jacob Geleijns, Diego Molina, Marçal Salvadó
Department: Ciències Mèdiques Bàsiques
URV's Author/s: SALVADÓ ARTELLS, MARÇAL; CROS, M. ; Joemai, R.M.S.; Geleijns, J.; Molina, D.
Keywords: Monte Carlo simulation dose reporting software CT dosimetry
Abstract: This study aims to develop and test software for assessing and reporting doses for standard patients undergoing computed tomography (CT) examinations in a 320 detector-row cone-beam scanner. The software, called SimDoseCT, is based on the Monte Carlo (MC) simulation code, which was developed to calculate organ doses and effective doses in ICRP anthropomorphic adult reference computational phantoms for acquisitions with the Aquilion ONE CT scanner (Toshiba). MC simulation was validated by comparing CTDI measurements within standard CT dose phantoms with results from simulation under the same conditions. SimDoseCT consists of a graphical user interface connected to a MySQL database, which contains the look-up-tables that were generated with MC simulations for volumetric acquisitions at different scan positions along the phantom using any tube voltage, bow tie filter, focal spot and nine different beam widths. Two different methods were developed to estimate organ doses and effective doses from acquisitions using other available beam widths in the scanner. A correction factor was used to estimate doses in helical acquisitions. Hence, the user can select any available protocol in the Aquilion ONE scanner for a standard adult male or female and obtain the dose results through the software interface. Agreement within 9% between CTDI measurements and simulations allowed the validation of the MC program. Additionally, the algorithm for dose reporting in SimDoseCT was validated by comparing dose results from this tool with those obtained from MC simulations for three volumetric acquisitions (head, thorax and abdomen). The comparison was repeated using eight different collimations and also for another collimation in a helical abdomen examination. The results showed differences of 0.1 mSv or less for absolute dose in most organs and also in the effective dose calculation. The software provides a suitable tool for dose assessment in standard adult patients undergoing CT examinations in a 320 detector-row cone-beam scanner.
Research group: Física i Cristal.lografia de Materials
Thematic Areas: Health sciences Ciencias de la salud Ciències de la salut
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0031-9155
Author identifier: 0000-0002-9399-6649
Record's date: 2017-11-29
Last page: 6321
Journal volume: 62
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: http://iopscience.iop.org/article/10.1088/1361-6560/aa77ea/meta
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.1088/1361-6560/aa77ea
Entity: Universitat Rovira i Virgili
Journal publication year: 2017
First page: 6304
Publication Type: Article Artículo Article
Repositori URV