نتایج جستجو برای: photon dose measurement

تعداد نتایج: 796871  

2005
F. W. Sun B. H. Liu Y. F. Huang Z. Y. Ou G. C. Guo

A measurement process is constructed to project an arbitrary two-mode N-photon state to a maximally entangled N-photon state (the NOON-state). The result of this projection measurement shows a typical interference fringe with an N-photon de Broglie wavelength. For an experimental demonstration, this measurement process is applied to a four-photon superposition state from two perpendicularly ori...

Journal: :Physical Review X 2021

By using qubit frequencies to encode information, an experiment demonstrates approach quantum measurement that replaces sequential observations with simultaneous ones, greatly improving time.

Journal: :iranian journal of medical physics 0
robab anbiaee assistant professor, radiotherapy and oncology dept., imam hossein hospital, shahid beheshti university, tehran, iran seyed mahmoud reza aghamiri associate professor, nuclear engineering-medical radiation dept., faculty of nuclear engineering, shahid beheshti university, tehran, iran zahra falahatpour m.sc in nuclear engineering-medical radiation, faculty of nuclear engineering, shahid beheshti university, tehran, iran

introduction: radiation therapy following breast conserving surgery is one of the most common procedures performed in any radiation oncology department. a tangential parallel-opposed pair is almost always the technique of choice for this purpose. this technique is often performed based on 3d treatment planning. the aim of this study was to compare 3d treatment planning for two different energie...

2000
Ákos Csilling

A preliminary update of the previous OPAL measurement of the inclusive production of D mesons in anti-tagged photon-photon collisions is presented together with the first preliminary OPAL measurement of bottom production in photon-photon collisions.

2015
Juha H. Koivisto Jan E. Wolff Timo Kiljunen Dirk Schulze Mika Kortesniemi

The aims of this study were to characterize reinforced metal-oxide-semiconductor field-effect transistor (MOSFET) dosimeters to assess the measurement uncertainty, single exposure low-dose limit with acceptable accuracy, and the number of exposures required to attain the corresponding limit of the thermoluminescent dosimeters (TLD). The second aim was to characterize MOSFET dosimeter sensitivit...

2016
Daniel L. Saenz Ganesh Narayanasamy Wilbert Cruz Nikos Papanikolaou Sotirios Stathakis

The Elekta Versa HD incorporates a variety of upgrades to the line of Elekta linear accelerators, primarily including the Agility head and flattening filter-free (FFF) photon beam delivery. The completely distinct dosimetric output of the head from its predecessors, combined with the FFF beams, requires a new investigation of modeling in treatment planning systems. A model was created in Pinnac...

Journal: :Journal of the Optical Society of America B 2014

2005
A. Valda D. M. Minsky A. J. Kreiner A. A. Burlon H. Somacal

Within our activities on accelerator-based boron neutron capture therapy (BNCT) carried out at the Tandar Laboratory (Comisión Nacional de Energı́a Atómica, Argentina) we present here the study and design of a tomographic imaging system for the measurement of the spatial distribution of the absorbed dose during a BNCT session. The 10B(n,α)7Li boron neutron capture reaction produces a 478 keV gam...

Journal: :iranian journal of medical physics 0
mohammad javad t ahmasebi associated professor, medical physics & radiotherapy dept., golestan hospital, ahwaz university of medical sciences, ahwaz, iran mohammad ali behrooz professor, medical physics dept., ahwaz university of medical sciences, ahwaz, iran shole arvandi assistant professor, radiotherapy & oncology dept., golestan hospital, ahwaz university of medical sciences, ahwaz, iran davood khezerloo m.sc. medical physics dept., ahwaz university of medical sciences, ahwaz, iran mojtaba karbalai m.sc. medical physics dept., golestan hospital, ahwaz university of medical sciences, ahwaz, iran

introduction: nowadays,  considerable developments  in  the field  of  radiotherapy have  been  achieved.  they  include  the  advances  made  in  the  equipments  and  treatment  planning  techniques  which  require  highly complex calculations. such achievements have made it possible to treat cancer patients not only  with  higher  radiation  dose  but  also  with  higher  precision  and  con...

Background: Radiotherapy with large mantle field is an effective technique in increasing the risk of secondary cancers among HL (Hodgkin Lymphoma) patients; therefore, it is essential to choose an effective treatment field including the least medical conditions in radiotherapy.Objective: The present study aimed to plan separate fields for neck and mediastinum using various energies, to compare ...

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