| In previous work we developed a list-mode iterative reconstruction algorithm (LMIRA) for SPECT applied to two dimensional image reconstruction. In the 2D case we calculated the emission radiance distribution on the circular enclosure of the object. This part is the forward projection. In the backprojection we sampled the radiance on the intermediate layer using the geometric properties of the...

Nowadays, Monte Carlo techniques are very common for the development of Nuclear Medicine systems. Simulations can be very helpful for the optimization of SPECT and PET cameras, and for investigating the importance of several physical effects involved in image formation. In this paper, a simulation study for evaluating various aspects inuencing image formation in detectors for Nuclear Medicine i...

PurposePatient-specific dosimetry in MRT relies on quantitative imaging, pharmacokinetic assessment and absorbed dose calculation. The DosiTest project was initiated to evaluate the uncertainties associated with each step of clinical workflow through a virtual multicentric trial. This work presents generation simulated SPECT datasets based GATE Monte Carlo modelling its corresponding experiment...

Title of Dissertation: A Coupled CFD/CSD Investigation of the Effects of Leading Edge Slat on Rotor Performance Asitav Mishra, Doctor of Philosophy, 2012 Dissertation directed by: Associate Professor James D. Baeder Department of Aerospace Engineering A coupled Computational Fluid Dynamic (CFD) and Computational Structural Dynamics (CSD) methodology is extended to analyze the effectiveness of a...

As a 2-year project of the Japanese Society of Nuclear Medicine working group activity, normal myocardial imaging databases were accumulated and summarized. Stress-rest with gated and non-gated image sets were accumulated for myocardial perfusion imaging and could be used for perfusion defect scoring and normal left ventricular (LV) function analysis. For single-photon emission computed tomogra...

INTEC, Ghent University/iMinds, Ghent, Belgium SPECT and MRI each have their respective advantages and limitations. Combining these two technologies in a synergistic manner allows researchers to exploit the strengths of both techniques but also result in disturbing eddy currents. In this paper, we studied the temporal variation of the induced magnetic field due to the transverse and longitudina...

Gamma-ray spectrometry is widely applied in several science fields, and particular non-destructive gamma scanning emission tomography of irradiated nuclear fuel. Often, a collimator used the experimental setup, to selectively interrogate region interest For optimization instrument design, as well for planning measurement campaigns, predictive models transmitted gamma-ray intensity through are n...

This paper describes a technique for speaker and language adaptive training (SLAT) for HMM-based polyglot speech synthesis and its evaluations on a multi-lingual speech corpus. The SLAT technique allows multi-speaker/multi-language adaptive training and synthesis to be performed. Experimental results show that the SLAT technique achieves better naturalness than both speaker-adaptively trained l...