نتایج جستجو برای: intercrystal scatter

تعداد نتایج: 12386  

Journal: :Physics in medicine and biology 1998
D J Kadrmas E C Frey S S Karimi B M Tsui

Accurate scatter compensation in SPECT can be performed by modelling the scatter response function during the reconstruction process. This method is called reconstruction-based scatter compensation (RBSC). It has been shown that RBSC has a number of advantages over other methods of compensating for scatter, but using RBSC for fully 3D compensation has resulted in prohibitively long reconstructi...

Journal: :Information Visualization 2010
Daniel A. Keim Ming C. Hao Umeshwar Dayal Halldór Janetzko Peter Bak

' Corresponding author. Abstract Scatter Plots are one of the most powerful and most widely used techniques for visual data exploration. A well-known problem is that scatter plots often have a high degree of overlap, which may occlude a significant portion of the data values shown. In this paper, we propose th e generalized scatter plot technique, which allows an overlap-free representation of ...

Journal: :Cytometry. Part A : the journal of the International Society for Analytical Cytology 2008
Bartek Rajwa Murugesan Venkatapathi Kathy Ragheb Padmapriya P Banada E Daniel Hirleman Todd Lary J Paul Robinson

Biological microparticles, including bacteria, scatter light in all directions when illuminated. The complex scatter pattern is dependent on particle size, shape, refraction index, density, and morphology. Commercial flow cytometers allow measurement of scattered light intensity at forward and perpendicular (side) angles (2 degrees <or= theta(1) <or= 20 degrees and 70 degrees <or= theta(2) <or=...

Journal: :European Journal of Operational Research 2006
Rafael Martí Manuel Laguna Fred Glover

Scatter search is an evolutionary method that has been successfully applied to hard optimization problems. The fundamental concepts and principles of the method were first proposed in the 1970s, based on formulations dating back to the 1960s for combining decision rules and problem constraints. In contrast to other evolutionary methods like genetic algorithms, scatter search is founded on the p...

Journal: :New Journal of Physics 2009

Journal: :Medical physics 2009
Lei Zhu Yaoqin Xie Jing Wang Lei Xing

Cone-beam CT (CBCT) is being increasingly used in modern radiation therapy for patient setup and adaptive replanning. However, due to the large volume of x-ray illumination, scatter becomes a rather serious problem and is considered as one of the fundamental limitations of CBCT image quality. Many scatter correction algorithms have been proposed in literature, while a standard practical solutio...

Journal: :Journal of the Meteorological Society of Japan. Ser. II 1980

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