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You searched on: Author: Michael Mitch

Displaying records 1 to 10 of 21 records.
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1. New National Air-Kerma Standard for Low-Energy Electronic Brachytherapy Sources
Series: Journal of Research (NIST JRES)
Report Number: 119.022
Published: 10/6/2014
Authors: Stephen Michael Seltzer, C Michelle O\'Brien, Michael G Mitch
Abstract: The purpose of this report is to document the NIST air-kerma measurement standard for the electronic brachytherapy sources, i.e., the Axxent sources of Xoft, Inc., which operate at tube potentials of 50 kV and anode currents of 300 μA. The ...

2. The Importance of Dosimetry Standardization in Radiobiology
Series: Journal of Research (NIST JRES)
Published: 12/30/2013
Authors: Marc F Desrosiers, Larry A DeWerd, James Deye, Patricia Lindsay, Mark K. Murphy, Michael G Mitch, Francesca Macchiarini, Strahinja Stojadinovic, Helen Stone
Abstract: Radiation dose is central too much of radiobiological research. Precision and accuracy of dose measurements and reporting of the measurement details should be sufficient to allow the work to be interpreted and repeated and to allow valid comparisons ...

3. Measurement of the absorbed dose distribution near Ir192 intravascular brachytherapy seed using a high spatial resolution gel dosimetry system
Published: 5/10/2012
Authors: Ronaldo Minniti, G. Massillon, Michael G Mitch, Christopher Graham Soares
Abstract: The absorbed dose distribution at sub-millimeter distances from the Best single 192Ir intravascular brachytherapy seed was measured using a high spatial resolution gel dosimetry system. Two gel phantoms from the same batch were used; one for the seed ...

4. A Dosimetric Uncertainty Analysis for Photon-Emitting Brachytherapy Sources: Report of the AAPM Task Group No. 138 and GEC-ESTRO
Published: 2/1/2011
Authors: Larry A DeWerd, Geoffrey S Ibbott, Ali S Meigooni, Michael G Mitch, Mark J Rivard, Kurt E Stump, Bruce R Thomadsen, Jack L. Venselaar
Abstract: This report addresses uncertainties pertaining to brachytherapy source dosimetry. The ISO Guide to the Expression of Uncertainty in Measurement (GUM) and the NIST Technical Note 1297 are taken as reference standards for uncertainty formalism. Uncer ...

5. High-resolution 3D dose distribution measured for two low-energy x-ray brachytherapy seeds: I125 and PD103
Published: 11/3/2010
Authors: Guerda Massillon, Ronaldo Minniti, Michael G Mitch, Christopher Graham Soares
Abstract: An investigation of the three-dimensional (3D) absorbed dose distribution around two low-energy photon (125I and 103Pd) brachytherapy seeds is presented. A high spatial resolution 3D gel scanning system has been utilized. The radial dose function, g( ...

6. Treatment of Uncertainties in Radiation Dosimetry
Published: 8/18/2009
Authors: Michael G Mitch, Larry DeWerd, Ronaldo Minniti, J Williamson
Abstract: When one perform a physical measurement or a Monte Carlo simulation and obtains a numerical result, the following questions may be asked. How accurate is the result? Is the measurement or simulation method of high quality? Can the result be meaning ...

7. Use of BANG3-Pro-1 gel Dosimetry to Measure the 3D Dose Distribution of a Sr90/Y90 Intravascular Brachytherapy Seed.
Published: 8/18/2009
Authors: Guerda Massillon, Ronaldo Minniti, Michael G Mitch, M.J. Maryanski, Christopher Graham Soares
Abstract: Absorbed dose distributions in 3D imparted by a single Novoste 5F 90Sr/90Y beta particle source of the type formerly used for intravascular brachytherapy were investigated. An innovative dosimetry medium known as BANG3-Pro-1 gel was used as a dosimet ...

8. Primary Standards for Brachytherapy Sources
Published: 6/1/2009
Authors: Michael G Mitch, Christopher Graham Soares
Abstract: The AAPM dosimetry protocol for LDR brachytherapy seeds that emit x-rays of energies ≤ 50 keV is described in the TG-43U1 report (Rivard et al. 2004). In this protocol, it is specified that the strength of such sources be expressed in terms of ...

9. Primary Standards and Dosimetry Protocols for Brachytherapy Sources
Published: 3/20/2009
Authors: Christopher Graham Soares, G. Douyssey, Michael G Mitch
Abstract: Current primary standards for the calibration of both photon and beta particle emitting brachythrapy sources are reviewed.  Methods for quality control being used as well as methods of transferring these standards to secondary laboratories and u ...

10. Supplement to the 2004 Update of the AAPM Task Group No. 43 Report
Published: 6/1/2007
Authors: Mark J Rivard, Wayne Butler, Larry A DeWerd, Saiful M Huq, Geoffrey S Ibbott, Christopher Melhus, Michael G Mitch, Ravinder Nath, J Williamson
Abstract: Since publication of the 2004 update to the American Association of Physicists in Medicine (AAPM) Task Group No. 43 Report (AAPM TG-43U1), several new low-energy photon-emitting brachytherapy sources have become available. Many of these sources have ...

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