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Medical Physics Seminar – Monday, December 06, 2010

Absorbed dose to water characterization of a low-energy miniature x-ray source used in brachytherapy applications.

Tina Pike (student of Dr. Larry DeWerd)
Research Assistant, Department of Medical Physics, UW-School of Medicine & Public Health, Madison, WI USA

The Xoft Axxent® miniature x-ray source is an expanding technology used in the treatment of several types of cancers, such as breast, gynecological, and skin cancers. The Axxent source is a high-dose rate source with a 50 kVp bremsstrahlung spectrum making it a suitable option for brachytherapy treatments. Low-energy brachytherapy sources, such as the Axxent source, are characterized following the American Association of Physicists in Medicine Task Group No. 43 protocol. This work aims to characterize these low-energy x-ray sources in terms of the absorbed dose to water parameters in TG-43 with thermoluminescent dosimeters, ionization chambers, spectra measurements, and Monte Carlo simulations.

Location: 1345 (HSLC) Health Sciences Learning Center, 750 Highland Avenue, Madison, WI 53705

Time: 4:00pm-5:00pm

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