Performance of TL and OSL techniques using CaSO4 and Al2O3 Dosimeters for Mean Glandular Dose (MGD) and Entrance Surface Skin Dose (ESD) determination in a digital mammographic unit as alternative dosimeters
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2017
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INTERNATIONAL TOPICAL MEETING ON INDUSTRIAL RADIATION AND RADIOISOTOPE MEASUREMENT APPLICATIONS, 10th
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The mammography is the most important and simple tool in the diagnosis of breast
diseases in women. In digital mammography, the process of image acquisition, display
and storage are separated which allows optimization of each. Despite the innumerous
advantages of this technique, such as an accurate diagnosis for women with dense
breast, it was noticed an increase of radiation doses to obtain the images by the new
system. As with any examination that includes x-rays, there is always a small stochastic
risk of inducing cancer. It is therefore important to evaluate the risk from the dose
delivered to the patient during the screening process. The mean glandular dose within
the breast is the recommended quantity to evaluate the risk from radiation to the breast.
To guarantee proper conditions of protection for patients, the radiation dose should be
as low as reasonably achievable possible and simultaneously compatible with image quality requirements. Thus, this work proposes the use of the thermoluminescent (TL)
CaSO4:Dy sintered discs, produced at IPEN, widely used in individual, environmental
and area monitoring in Brazil, and Al2O3:C optically stimulated luminescence (OSL)
‘dot’ dosimeters, manufactured by Landauer® Inc., as application as easy-to-use and
low cost alternative dosimeters to evaluate the entrance skin doses (ESD) delivered to
patients, the half value layer (HVL) and the mean glandular doses (MGD) in a
mammographic digital unit, comparing these two techniques with the results obtained
using an All-in-one QC meter. The results obtained demonstrated that the TL and OSL
dosimetry systems and the CaSO4 and Al2O3 dosimeters used are able to evaluate the
entrance skin dose as well as mean glandular doses in a digital mammographic unit
accurately within the requirements, and they can be considered a practical, simple,
easy-to-use and low cost tools for verification of these items in a Quality Assurance
Program.
Como referenciar
ROCHA, FELICIA D.G.; VILLANI, DANIEL; CAMPOS, VICENTE de P. de; NOGUEIRA, MARIA do S.; GOULART, MAURICIO E.; SICHITO, VALTER; CAMPOS, LETICIA L. Performance of TL and OSL techniques using CaSO4 and Al2O3 Dosimeters for Mean Glandular Dose (MGD) and Entrance Surface Skin Dose (ESD) determination in a digital mammographic unit as alternative dosimeters. In: INTERNATIONAL TOPICAL MEETING ON INDUSTRIAL RADIATION AND RADIOISOTOPE MEASUREMENT APPLICATIONS, 10th, July 09-13, 2017, Chicago, IL, USA. Abstract... p. 62-63. Disponível em: http://repositorio.ipen.br/handle/123456789/27955. Acesso em: 12 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.