Determination of the quality index (Q) for photon beams at arbitrary field sizes

2009 ◽  
Vol 36 (9Part1) ◽  
pp. 4168-4172 ◽  
Author(s):  
Otto A. Sauer
Keyword(s):  
Quality Index ◽  
Arbitrary Field ◽  
Photon Beams

Analysis of the penumbra enlargement in lung versus the Quality Index of photon beams: A methodology to check the dose calculation algorithm

2004 ◽  
Vol 31 (4) ◽  
pp. 943-949 ◽  
Author(s):  
Miltiadis F. Tsiakalos ◽  
Kiki Theodorou ◽  
Constantin Kappas ◽  
Sofia Zefkili ◽  
Jean-Claude Rosenwold
Keyword(s):  
Quality Index ◽  
Dose Calculation ◽  
Photon Beams ◽  
Calculation Algorithm ◽  
Dose Calculation Algorithm

scholarly journals Comparative investigation of beam quality index Q on flattening filter and flattening filter free 6 and 15 MV photon beams of an medical linear accelerator

2017 ◽  
Vol 3 (2) ◽  
pp. 287-290
Author(s):  
Michael Schaks ◽  
Johannes Zähle ◽  
Martin Janich ◽  
Patrick Hübsch ◽  
Nico Homonnay ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Quality Index ◽  
Beam Quality ◽  
Comparative Investigation ◽  
Central Axis ◽  
Photon Beams ◽  
Medical Linear Accelerator ◽  
Flattening Filter Free ◽  
Flattening Filter ◽  
Beam Quality Correction Factor

AbstractAn Elekta Synergy LINAC was used to investigate the beam quality index Q and the beam quality correction factor kQ, which is used for absolute dosimetry, in off-axis photon fields. It was found that the beam quality index Q of the photon energies with flattening filter decreases with increasing distance to the central axis, at 6 MV by 4.27% and at 15 MV by 3.98% inside a range of 15 cm off-axis. The beam quality index for flattening filter free photon fields also decreases with increasing distance to the central axis. In this case Q changed only by 1.01% inside the above range.

Determination of water quality index for ground water near municipal dump site in Guntur

2020 ◽  
Vol 33 ◽  
pp. 724-727
Author(s):  
Sowmya Munagala ◽  
Durga Chaitanya Kumar Jagarapu ◽  
Ratnamala Reddy B.S.S.
Keyword(s):  
Water Quality ◽  
Ground Water ◽  
Water Quality Index ◽  
Quality Index ◽  
Dump Site

scholarly journals Frequency Response Quality Index for Assessing the Mechanical Condition of Transformer Windings

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 29 ◽  
Author(s):  
Eugeniusz Kornatowski ◽  
Szymon Banaszak
Keyword(s):  
Frequency Response ◽  
Quality Index ◽  
Response Analysis ◽  
Test Results ◽  
Response Curves ◽  
Response Measurement ◽  
Response Quality ◽  
Mechanical Condition ◽  
Measurement Results

Frequency response analysis (FRA) is a popular method for assessing a transformer’s mechanical condition. The paper proposes a new method for interpreting the frequency response measurement results. The currently used numerical indices only give one value, which may be misleading in the analysis, while the proposed frequency response quality index (FRQI) tool analyses three separate features in the whole frequency range. The applied numerical calculations technique allows for estimations of not only the values of the average quality indices, but also locally for given frequency ranges of the analysed spectrum. It allows for determination of the problems that can be found in the active part of a transformer. The presented results come from three transformers, representing cases of typical faults. Two of them are from industry, while one was used for deformational tests in laboratory conditions. The proposed FRQI method showed its usefulness in FRA test results analysis and may be introduced into the automated assessment of such data. Each of the component parameters is sensitive to other types of differences observed between the compared frequency response curves, and may be used as a good quality detection tool.

Determination of essential oil quality index by using energy summation indices in an elite strain ofCymbopogon citratus (DC) Stapf [RRL(J)CCA12]

2005 ◽  
Vol 20 (2) ◽  
pp. 118-121 ◽  
Author(s):  
Ashok Kumar Shahi ◽  
Maharaj Krishan Kaul ◽  
Renu Gupta ◽  
Prabhu Dutt ◽  
Suresh Chandra ◽  
...  
Keyword(s):  
Essential Oil ◽  
Quality Index ◽  
Oil Quality

On the use of a quality index to specify high energy photon beams

1986 ◽  
Vol 5 (1) ◽  
pp. 65-73 ◽  
Author(s):  
A. Bridier ◽  
H. Beauvais ◽  
A. Dutreix
Keyword(s):  
Quality Index ◽  
High Energy ◽  
High Energy Photon ◽  
Photon Beams ◽  
Energy Photon
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