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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 261 to 270 of 369 (0.074 seconds)Spelling suggestions: "subject:"fhysics, adiation."" "subject:"fhysics, aadiation.""
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Characterizing ionization chamber dosimetry in inverse planned IMRT fieldsFraser, Danielle J. January 2005 (has links)
It is standard practice in radiation therapy to have two independent calculations for the number of monitor units used in patient treatment plans. The relationship between monitor units and absorbed dose to water is sophisticated for MLC-based IMRT. Verification measurements of absorbed dose to water with ionization chambers in MLC-based IMRT fields remains uncertain and the accuracy of computer modeling is limited by the physics assumptions used. In this thesis, point dose measurements from three cylindrical ionization chambers of different collecting volumes are evaluated against the CORVUS (NOMOS Corporation, Cranberry, PA) finite-size pencil beam algorithm and the PEREGRINE (NOMOS Corporation, Cranberry, PA) Monte Carlo calculation engine. After establishing the characteristics of the chambers and treatment planning system under various beam geometries, dynamic and step and shoot MLC deliveries were evaluated. Between detectors, the smallest volume chamber measured the greatest dose. Compared to measurements, CORVUS and PEREGRINE both underestimated the dose in IMRT fields by approximately 5%. On average PEREGRINE yielded better agreement than CORVUS by 2%.
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| 262 |
The neutronic design and performance of the Indiana University Cyclotron Facility (IUCF) Low Energy Neutron Source (LENS)Lavelle, Christopher M., January 2007 (has links)
Thesis (Ph.D.)--Indiana University, Dept. of Physics, 2007. / Title from PDF t.p. (viewed Nov. 20, 2008). Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1688. Adviser: David V. Baxter.
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| 263 |
Fitting the linear-quadratic model to detailed data sets for different dose ranges /Garcia-Fernández, Lourdes Maria, January 1900 (has links)
Thesis (M.Sc.) - Carleton University, 2005. / Includes bibliographical references (p. 130-136). Also available in electronic format on the Internet.
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| 264 |
Biomimetic, polymer-based microcantilever infrared sensors.Mueller, Michael Thomas. January 2007 (has links)
Thesis (Ph.D.)--University of California, San Francisco with the University of California, Berkeley, 2007. / Source: Dissertation Abstracts International, Volume: 68-11, Section: B, page: 7476. Adviser: Albert P. Pisano.
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| 265 |
Cathodoluminescence based imaging of periodically poled integrated optical waveguide devices in lithium niobate: Basic mechanism and application.Tafon Penn, Samson. January 2007 (has links)
Thesis (Ph.D.)--Lehigh University, 2007. / Adviser: Habil Volkmar Dierolf.
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| 266 |
MR based frickle-gelatin dosimetry : uncertainty evaluation and computerised analysis of measured dose distributionsBelanger, Philippe. January 2001 (has links)
No description available.
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| 267 |
Experimental verification of Monte Carlo calculated dose distributions for clinical electron beamsDoucet, Robert. January 2001 (has links)
No description available.
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| 268 |
La tomographie par émission de positons à l'étude de la réponse hémodynamique temporelle induite par activation cérébrale : (TEP-RHETIAC)Tremblay, Hugo. January 2000 (has links)
No description available.
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| 269 |
Rotational total skin electron irradiation (RTSEI) with a 6 MeV electron linear acceleratorReynard, Eric P. January 2007 (has links)
No description available.
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| 270 |
Validation of total skin electron therapy by the Monte Carlo techniqueHuang, Vicky W. January 2004 (has links)
No description available.
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