Comparison of Different Methods for Shielding Design in Computed Tomography
| Autor: | Dusko Kosutic, Danijela Arandjic, Olivera Ciraj-Bjelac |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Dose profile Computed tomography Scatter dose Radiation Dosage 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Radiation Protection medicine Humans Radiology Nuclear Medicine and imaging Radiation Radiological and Ultrasound Technology medicine.diagnostic_test business.industry Public Health Environmental and Occupational Health General Medicine Equipment Design 3. Good health 030220 oncology & carcinogenesis Electromagnetic shielding Computer-Aided Design Tomography Radiation protection business Nuclear medicine Tomography X-Ray Computed Head Neck |
| Zdroj: | Radiation Protection Dosimetry |
| Popis: | The purpose of this work is to compare different methods for shielding calculation in computed tomography (CT). The BIR-IPEM (British Institute of Radiology and Institute of Physics in Engineering in Medicine) and NCRP (National Council on Radiation Protection) method were used for shielding thickness calculation. Scattered dose levels and calculated barrier thickness were also compared with those obtained by scatter dose measurements in the vicinity of a dedicated CT unit. Minimal requirement for protective barriers based on BIR-IPEM method ranged between 1.1 and 1.4 mm of lead demonstrating underestimation of up to 20 % and overestimation of up to 30 % when compared with thicknesses based on measured dose levels. For NCRP method, calculated thicknesses were 33 % higher (27-42 %). BIR-IPEM methodology-based results were comparable with values based on scattered dose measurements, while results obtained using NCRP methodology demonstrated an overestimation of the minimal required barrier thickness. |
| Databáze: | OpenAIRE |
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