SIMULATING LOCAL DENSE AREAS USING PMMA TO ASSESS AUTOMATIC EXPOSURE CONTROL IN DIGITAL MAMMOGRAPHY
| Autor: | G. J. den Heeten, R E van Engen, R. W. Bouwman, Wouter J. H. Veldkamp, Kenneth C. Young, David R. Dance, Mireille J. M. Broeders, Joke Binst, Hilde Bosmans |
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| Přispěvatelé: | Radiology and Nuclear Medicine |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Adult
Digital mammography Computer science education Breast Neoplasms Guidelines as Topic Signal-To-Noise Ratio Radiation Dosage Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences Breast cancer screening 0302 clinical medicine medicine Mammography Humans Polymethyl Methacrylate Radiology Nuclear Medicine and imaging Automatic exposure control Radiation Radiological and Ultrasound Technology medicine.diagnostic_test business.industry Phantoms Imaging Public Health Environmental and Occupational Health General Medicine Middle Aged equipment and supplies Europe Radiographic Image Enhancement Signal-to-noise ratio (imaging) 030220 oncology & carcinogenesis Radiographic Image Interpretation Computer-Assisted Female business Quality assurance Biomedical engineering |
| Zdroj: | Radiation Protection Dosimetry, 169(1-4), 143-150 Radiation protection dosimetry, 169(1-4), 143-150. Oxford University Press |
| ISSN: | 0144-8420 |
| Popis: | Current digital mammography (DM) X-ray systems are equipped with advanced automatic exposure control (AEC) systems, which determine the exposure factors depending on breast composition. In the supplement of the European guidelines for quality assurance in breast cancer screening and diagnosis, a phantom-based test is included to evaluate the AEC response to local dense areas in terms of signal-to-noise ratio (SNR). This study evaluates the proposed test in terms of SNR and dose for four DM systems. The glandular fraction represented by the local dense area was assessed by analytic calculations. It was found that the proposed test simulates adipose to fully glandular breast compositions in attenuation. The doses associated with the phantoms were found to match well with the patient dose distribution. In conclusion, after some small adaptations, the test is valuable for the assessment of the AEC performance in terms of both SNR and dose. |
| Databáze: | OpenAIRE |
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