A mammographic phantom to measure mean glandular dose by thermoluminescent dosimetry |
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| Affiliation: | 1. College of Pharmacy, University of Arizona, Tucson, AZ, 85721, United States;2. College of Medicine, University of Arizona, Tucson, AZ, 85721, United States;3. Hematology, Oncology, Blood & Marrow Transplantation, Department of Medicine, University of Arizona, Tucson, AZ, 85721, United States;1. Faculty of Computer Science and Information Technology, University of Malaya, Malaysia;2. Department of Computer Science, Utah State University, USA;3. Faculty of Engineering, Shinshu University, Japan;1. National and Kapodistrian University of Athens, Medical School, 2nd Dpt. of Radiology, Medical Physics Unit, ATTIKON University Hospital, 1 Rimini St, 124 62 Haidari, Athens, Greece;2. Hygeia Hospital, 4 Erythrou Stavrou & Kifisias Av., Marousi 151 23, Athens, Greece;3. Konstantopoulio General Hospital–Agia Olga, 3 Agias Olgas St, Nea Ionia, 142 33, Athens, Greece;1. INFN, Laboratori Nazionali di Frascati, C.P. 13, Via E. Fermi 40, I-00044 Frascati (Roma), Italy;2. Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria BC V8W3P6, Canada;3. Politecnico di Milano, Dipartimento di Elettronica e Informazione, Piazza L. da Vinci 3 2, I-20133 Milano, Italy;4. INFN Sezione di Milano, Via Celoria 16, 20133 Milano, Italy;5. Stefan-Meyer-Institut für Subatomare Physik, Boltzmanngaße 3, 1090 Wien, Austria;6. IFIN-HH, Institutul National pentru Fizica si Inginerie Nucleara Horia Hulubbei, Reactorului 30, Magurele, Romania;7. Department of Physics, Faculty of Science, University of Zagreb, Bijenicka 32, HR-10000 Zagreb, Croatia;8. INFN Sezione di Roma I and Instituto Superiore di Sanita, I-00161 Roma, Italy;9. Department of Physics, School of Science, The University of Tokyo, Bunkyo-ku Hongo 7-3-1, Tokyo, Japan;10. RIKEN, Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 251-0198, Japan;11. Museo Storico della Fisca e Centro Studi e Ricerche “Enrico Fermi”, Piazza del Viminale 1-00184 Roma, Italy;12. Universidade de Santiago de Compostela, Casas Reais 8, 15782 Santiago de Compostela, Spain;13. National Institute of Standards and Technology (NIST), Boulder, CO, 80303, USA;14. High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801, Japan;15. Excellence Cluster Universe, Technische Universität München, Boltzmannstraße 2, D-85748 Garching, Germany;1. Institute of Health & Society, Newcastle University, Sir James Spence Institute, Royal Victoria Infirmary, Newcastle upon Tyne, NE1 4LP, UK;2. Institute of Radiation Protection and Dosimetry, Brazilian Nuclear Energy Commission, Av. Salvador Allende, Barra da Tijuca, Rio de Janeiro, RJ, 22783-127, Brazil;3. Brazilian National Cancer Institute, Rua do Rezende, 128/322, Centro, Rio de Janeiro, RJ, 20231-092 RJ, Brazil |
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| Abstract: | We have designed a phantom to evaluate mean glandular dose (MGD) as part of the regulatory dosimetry control for mammographic equipment. The phantom is constituted by TLD-100 thermoluminescent dosemeters (TLDs) inserted within semicircular plates of acrylic. Different groups of TLDs are used to determine entrance surface air kerma and half-value layer (HVL). Calibration of both tasks has been performed using a Senographe 2000D system and an ionization chamber. The phantom has been tested in five clinical systems. The HVL and MGD obtained by this method agree, on average, within 3%, with those from standard procedures based on the use of ionization chambers. The phantom MGD measurements have a combined uncertainty better than 10% (k = 1). |
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| Keywords: | Mammography Mean glandular dose TLD-100 Mammographic phantom |
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