نتایج جستجو برای: portable gamma camera
تعداد نتایج: 211659 فیلتر نتایج به سال:
In the early 90s the first portable computing applications became widely available. At this time, lower performance than the mains dependant counterparts was accepted. However, today user demand small lightweight portable systems with long battery operating times without any compromise in computing performance. To meet these customer demands, a consequent low power approach has to be taken star...
We, the thesis committee for the above candidate for the Master of Science degree, Hereby recommend acceptance of this thesis. Acknowledgements The initiative to build a 3D-camera belongs exclusively to Professor Manuel M. Oliveira, who has been a wonderful advisor, a talented teacher, and a close friend to me for almost one year. Professor Olivera has managed to turn my skepticism about this p...
The sum of correlated gamma random variables appears in the analysis of many wireless communications systems, e.g. in systems under Nakagami-m fading. In this Letter we obtain exact expressions for the probability density function (PDF) and the cumulative distribution function (CDF) of the sum of arbitrarily correlated gamma variables in terms of certain Lauricella functions. Index Terms Gamma ...
The purpose of quality control (QC) is to detect changes in the performance of a gamma camera system that may adversely affect the interpretation of clinical studies. Clearly, there are a large number of factors that contribute to the final image quality, including uniformity, resolution (both intrinsic and energy), collimation and the hard copy device. In addition, for certain types of studies...
Intravascular brachytherapy is simulated with Palmaz-Schatz stent, manufactured by Cordis Co. that is radioactived with 188Re source, using the MCNPX code. Functions and dosimetric parameters, were calculated in cylindrical coordinates and results compared with the latest standards and AAPM TG-60 group offers, published experimental data and also other performed simulations with various p...
The vision Group at the center for Advanced visual Studies (cAvS) at the Massachusetts Institute of Technology (MIT) has developed the Seeing Machine camera (SMc) under the direction of elizabeth Goldring, a visually challenged artist. The SMc is an innovative tool that enables artistic expression for those with decreased vision. The camera enhances the ability to see the face of a loved one, l...
Abstract is NOT available
Phase Shifting Profilometry is a method of structured light whose three-dimensional reconstructions are susceptible to error from Gamma distortion. In practice, the luminance nonlinearity caused by the Gamma distortion effect of a digital video projector and a digital camera yields undesired fringe intensity changes, which substantially reduce the measurement accuracy, and while the effects of ...
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