Organ doses and risks of computed tomography examinations in Recife, Brazil
| Autor: | V.S.M. Barros, Marcos Ely Almeida Andrade, Simone K. Dias, Helen J. Khoury, C Borrás |
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| Rok vydání: | 2012 |
| Předmět: |
Adult
Male medicine.medical_specialty Neoplasms Radiation-Induced Population Computed tomography Radiation Dosage Risk Assessment Pelvis Radiation Protection Risk Factors Abdomen medicine Humans Dosimetry Cancer Induction Radiometry education Waste Management and Disposal Aged education.field_of_study medicine.diagnostic_test business.industry Incidence Public Health Environmental and Occupational Health Cancer General Medicine Middle Aged Thorax medicine.disease medicine.anatomical_structure Female Radiology Radiation protection Tomography X-Ray Computed business Head Brazil |
| Zdroj: | Journal of Radiological Protection. 32:251-260 |
| ISSN: | 1361-6498 0952-4746 |
| DOI: | 10.1088/0952-4746/32/3/251 |
| Popis: | Computed tomography (CT) examinations have increased significantly in recent years due to technological innovations. In some industrialised countries, CT contributes to the population dose as much as background radiation. In developing countries, the uses and risks of CT have not been well characterised. The purpose of this investigation was to assess potential stochastic and deterministic radiation effects from common CT exams performed in six hospitals of Recife, Pernambuco. Scanning parameters and patient gender and age were collected for a total of 285 patients undergoing CT examinations of the head (90), chest (75), abdomen (60) and abdomen?pelvis (60). The organ doses, which were calculated using the ImPACT dosimetry calculator, varied significantly among institutions. Organs such as the brain, the heart and the eye lenses, which exhibited doses as high as 85, 42 and 100?mGy, respectively, are of concern for the production of cerebrovascular and cardiovascular diseases and cataracts. Effective cancer risks were calculated using Brenner methodology and BEIR-VII risk factors. They range from 1.8 to 110.2 cases per 100?000 persons for cancer induction and from 1.5 to 63.0 cases per 100?000 for cancer mortality. To reduce doses, a quality assurance programme that includes procedural justification and radiation protection optimisation should be implemented. |
| Databáze: | OpenAIRE |
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