National Coordinating Center for the Physics of Mammography

Guildford, United Kingdom

National Coordinating Center for the Physics of Mammography

Guildford, United Kingdom
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Oduko J.,National Coordinating Center for the Physics of Mammography | Young K.,National Coordinating Center for the Physics of Mammography | Young K.,University of Surrey
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

A nation-wide survey of patient dose data was carried out, using data recorded in 2013–2015. Data from 32,000 women were collected. The average dose for oblique views, for DR systems, was 1.65 mGy for all women, and 1.35 mGy for 50–60 mm breasts. There was a wide range of doses for different systems, with the highest more than twice the dose of the lowest (2.03 mGy and 0.91 mGy respectively for the Hologic Dimensions and Philips MicroDose L30 systems, averaged over all breasts). Image quality, as indicated by the threshold gold thickness for 0.25 mm details, was better (0.21 μm) for the Hologic systems; for all the others it was practically the same (0.28 μm), although their doses to the average breast varied over a wide range. © Springer International Publishing Switzerland 2016.


Oduko J.,National Coordinating Center for the Physics of Mammography | Homolka P.,Medical University of Vienna | Jones V.,Northampton General Hospital | Whitwam D.,Northampton General Hospital
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

Physics and radiographer QC procedures are urgently needed as the first few contrast-enhanced dual energy systems have been installed in the U.K. Preliminary work on one commercially available system has enabled us to propose new tests, relevant to the properties of dual energy imaging systems. Results are presented for measurements with the chosen phantom, which contains disks with a range of iodine content from 0.25 to 2 mg/cm2. Breasts of different thicknesses and different glandularity were simulated by adding slabs of CIRS material, of a range of compositions, on top of the phantom. The system tested had a response which was proportional to the iodine content of disks in the phantom, had good reproducibility, and did not change significantly when simulated breast thickness and composition were varied. © 2014 Springer International Publishing.


Strudley C.J.,National Coordinating Center for the Physics of Mammography | Young K.C.,National Coordinating Center for the Physics of Mammography
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

The standard test object used to assess the imaging performance of digital mammography systems in Europe is the CDMAM model 3.4. The recently released CDMAM model 4.0 differs from the model 3.4 in the layout, number and range of thicknesses of gold contrast details used to assess threshold contrast detail detection. In order to evaluate CDMAM 4.0 we compared its performance with that of the CDMAM 3.4 using several digital mammography systems at various dose levels. We also assessed the reproducibility of the results compared to that of the previous model. CDMAM 4.0 results were comparable to results for CDMAM 3.4 for detail diameters in the range 0.1 to 0.5mm and for the larger detail diameters there were increased differences as would be expected due to the design differences of the CDMAM 4.0. The reproducibility of CDMAM 4.0 results was found to be better than that of CDMAM 3.4 results. © 2014 Springer International Publishing.

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