SimDoseCT: dose reporting software based on Monte Carlo simulation for a 320 detector-row cone-beam CT scanner and ICRP computational adult phantoms
| Autor: | Maria Cros, M. Salvadó, Diego Molina, Raoul M. S. Joemai, Jacob Geleijns |
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| Rok vydání: | 2017 |
| Předmět: |
Thorax
Adult Male Scanner ICRP computational adult phantoms Tomography Scanners X-Ray Computed Databases Factual Computer science 320 detector-row cone-beam scanner Monte Carlo method Computed tomography CT dosimetry Radiation Dosage Effective dose (radiation) Imaging phantom Collimated light 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Software medicine Humans Radiology Nuclear Medicine and imaging dose reporting software Cone beam ct Monte Carlo simulation Radiological and Ultrasound Technology medicine.diagnostic_test business.industry Phantoms Imaging Detector Cone-Beam Computed Tomography 030220 oncology & carcinogenesis Female Tomography business Nuclear medicine Tomography X-Ray Computed Monte Carlo Method |
| Zdroj: | Physics in Medicine and Biology, 62(15), 6304-6321 |
| ISSN: | 1361-6560 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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