نتایج جستجو برای: dose accuracy dosecalculation algorithms

تعداد نتایج: 933128  

2017
Isaac C. F. Chang Jeff Chen Slav Yartsev

Helical tomotherapy with its advanced method of intensity-modulated radiation therapy delivery has been used clinically for over 20 years. The standard delivery quality assurance procedure to measure the accuracy of delivered radiation dose from each treatment plan to a phantom is time-consuming. RadCalc®, a radiotherapy dose verification software, has released specifically for beta testing a m...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2008
mohammad masoori ramin bozorgmehry boozarjomehry maryam sarnavi j nafise reshadi

kinetic modeling is an important issue, whose objective is the accurate determination of the rates of various reactions taking place in a reacting system. this issue is a pivotal element in the process design and development particularly for novel processes which are based on reactions taking place between various types of species. the fischer tropsch (ft) reactions have been used as the kineti...

1998
Brett Ninness Juan Carlos Gomez

The use of adaptive algorithms such as Kalman Filtering, LMS and RLS together with FIR model structures is very common and extensively analysed. In the interests of improved performance an extension of the FIR structure has been proposed in which the fixed poles are not all at the origin, but instead are chosen by prior knowledge to be close to where the true poles are. Existing FIR analysis wo...

2015
Philipp Freislederer Michael Reiner Winfried Hoischen Anton Quanz Christian Heinz Franziska Walter Claus Belka Matthias Soehn

BACKGROUND Knowing the technical characteristics of gated radiotherapy equipment is crucial for ensuring precise and accurate treatment when using techniques such as Deep-Inspiration Breath-Hold and gating under free breathing. With one of the first installations of the novel surface imaging system Catalyst™ (C-RAD AB, Sweden) in connection with an Elekta Synergy linear accelerator (Elekta AB, ...

Journal: :CoRR 2011
Günce Keziban Orman Vincent Labatut Hocine Cherifi

Community structure discovery in complex networks is a quite challenging problem spanning many applications in various disciplines such as biology, social network and physics. Emerging from various approaches numerous algorithms have been proposed to tackle this problem. Nevertheless little attention has been devoted to compare their efficiency on realistic simulated data. To better understand ...

2016
Pooja Pandey Ishpreet Singh

Mining large data set is an important issue to deal with as data is growing as the field grows. Today, crime rate is a menace that each country faces. With the increase in crime rate the data is increasing and it is such a critical field that accuracy is important at the same time. This paper shows the comparison in the results between clustering and the classification. K means is used in clust...

Journal: :Seminars in nuclear medicine 2003
Brian F Hutton Michael Braun

Image registration is finding increased clinical use both in aiding diagnosis and guiding therapy. There are numerous algorithms for registration, which all involve maximizing a measure of similarity between a transformed floating image and a fixed reference image. The choice of the similarity measure depends, to some extent, on the application. Methods based on the use of the joint intensity h...

Journal: :journal of linear and topological algebra (jlta) 0
m nili ahmadabadi department of mathematics, islamic azad university, najafabad branch, iran.

in this paper, a fundamentally new method, based on the de nition, is introduced for numerical computation of eigenvalues, generalized eigenvalues and quadratic eigenvalues of matrices. some examples are provided to show the accuracy and reliability of the proposed method. it is shown that the proposed method gives other sequences than that of existing methods but they still are convergent to t...

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