PMID: 16532959Mar 15, 2006Paper

Characterization of metal oxide semiconductor field effect transistor dosimeters for application in clinical mammography

Medical Physics
Luis A Benevides, D E Hintenlang

Abstract

Five high-sensitivity metal oxide semiconductor field effect transistor dosimeters in the TN-502 and 1002 series (Thomson Nielsen Electronics Ltd., 25B, Northside Road, Ottawa, ON K2H8S1, Canada) were evaluated for use in the mammography x-ray energy range (22-50 kVp) as a tool to assist in the documentation of patient specific average glandular dose. The dosimeters were interfaced with the Patient Dose Verification System, model No. TN-RD 15, which consisted of a dosimeter reader and up to four dual bias power supplies. Two different dual bias power supplies were evaluated in this study, model No. TN-RD 22 in high-sensitivity mode and a very-high sensitivity prototype. Each bias supply accommodates up to five dosimeters for 20 dosimeters per system. Sensitivity of detectors, defined as the mV/C kg(-1), was measured free in air with the bubble side of the dosimeter facing the x-ray field with a constant exposure. All dosimeter models' angular response showed a marked decrease in response when oriented between 120 degrees and 150 degrees and between at 190 degrees and 220 degrees relative to the incident beam. Sensitivity was evaluated for Mo/Mo, Mo/Rh, and Rh/Rh target-filter combinations. The individual dosimeter model sensiti...Continue Reading

References

Nov 1, 1994·Medical Physics·D J GladstoneL M Chin
Mar 1, 1997·International Journal of Radiation Oncology, Biology, Physics·R RamaniP O'Brien
Oct 31, 2002·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·S L DongJ J Hwang
Oct 31, 2002·Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine·S L DongJ S Lee
Mar 21, 2003·Health Physics·Joel N Roshau, David E Hintenlang
May 4, 2004·The British Journal of Radiology·H M Warren-Forward, L Duggan

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Citations

Oct 5, 2011·Australasian Physical & Engineering Sciences in Medicine·Anna HaytonJoseph Pillainayagam
Feb 17, 2009·Physics in Medicine and Biology·R Nowotny, A Taubeck
Oct 27, 2016·Nanotechnology·Richard A BoucherAnindya Majumder
Sep 13, 2016·Physics in Medicine and Biology·David R Dance, Ioannis Sechopoulos

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