Characteristics of a tandem system of ionization chambers in X-ray beams,mammography level |
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| Authors: | LC Afonso V Vivolo LVE Caldas |
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| Institution: | 1. Department of Cancer Epidemiology, Division of Population Sciences, H. Lee Moffitt Cancer Center, Tampa, Florida;2. Department of Health Sciences Research, Mayo Clinic College of Medicine, Rochester, Minnesota;3. Department of Cancer Imaging and Metabolism, H. Lee Moffitt Cancer Center, 12901 Magnolia Drive, Tampa, FL 33612;1. Department of Cardiology, Boston Children’s Hospital, Boston, Massachusetts;2. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts;3. Department of Biostatistics, Harvard School of Public Health, Boston, Massachusetts;4. Department of Pathology, Boston Children’s Hospital, Boston, Massachusetts;5. Department of Pathology, Harvard Medical School, Boston, Massachusetts;6. Department of Pathology, Massachusetts General Hospital, Boston, Massachusetts;1. Department of Radiology, Institut Curie, 26 rue d’Ulm, 75005 Paris, France;2. Department of Surgical Oncology, Institut Curie, 26 rue d’Ulm, 75005 Paris, France;3. Department of Public Health, Institut Curie, 26 rue d’Ulm, 75005 Paris, France |
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| Abstract: | Two parallel plate ionization chambers (inserted in slab phantoms) recently assembled at IPEN were studied in relation to their operational characteristics for use in quality control of X-ray beams, mammography level. The chambers present only one difference: one has an inner collecting electrode made of graphite and the other, of aluminum. These chambers make up a tandem system, which may be employed to verify X-ray beams energy constancy, by the confirmation of half-value layers and effective energies, and to determinate air kerma rates. The chambers presented good results for the operational tests, as recommended internationally. |
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