Author, as appears in the article.: Cros M., Joemai R., Geleijns J., Molina D., Salvadó M.

Department: Ciències Mèdiques Bàsiques

URV's Author/s: Salvadó Artells, Marçal

Keywords: Monte carlo simulation Icrp computational adult phantoms Dose reporting software Ct dosimetry 320 detector-row cone-beam scanner

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.

Thematic Areas: Saúde coletiva Radiology, nuclear medicine and imaging Radiology, nuclear medicine & medical imaging Radiological and ultrasound technology Psicología Odontología Medicina ii Medicina i Matemática / probabilidade e estatística Interdisciplinar General medicine Engineering, biomedical Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciência da computação Astronomia / física

licence for use: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 00319155

Author's mail: m.salvado@urv.cat

Author identifier: 0000-0002-9399-6649

Record's date: 2023-02-18

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: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: Physics In Medicine And Biology. 62 (15): 6304-6321

APA: Cros M., Joemai R., Geleijns J., Molina D., Salvadó M. (2017). SimDoseCT: Dose reporting software based on Monte Carlo simulation for a 320 detector-row cone-beam CT scanner and ICRP computational adult phantoms. Physics In Medicine And Biology, 62(15), 6304-6321. DOI: 10.1088/1361-6560/aa77ea

Article's DOI: 10.1088/1361-6560/aa77ea

Entity: Universitat Rovira i Virgili

Journal publication year: 2017

Publication Type: Journal Publications