Parallelization of the forward and inverse problems of electro-magnetic source imaging of the human brain

Parallelization of K-Means and DBSCAN clustering algorithms on a HPC cluster Durrani, Hunain; Coşar, Ahmet; Department of Computer Engineering (2013) The amount of information that must be processed daily by computer systems has reached huge quantities. It is impossible, or would be prohibitively expensive, to build such a powerful supercomputer that could process such large data in the required time limits. Cluster computing has emerged to address this problem by connecting hundreds of small computers using ultra-fast switches so that their combined computational power and parallel processing techniques make it possible to quickly solve many difficult p...
DaParT: a data-parallel programming tool Şener, Cevat; Kiper, Ayşe; Department of Computer Engineering (2000)
Measurement of AC magnetic field distribution using magnetic resonance imaging Ider, YZ; Muftuler, LT (1997-10-01) Electric currents are applied to body in numerous applications in medicine such as electrical impedance tomography, cardiac defibrillation, electrocautery, and physiotherapy. If the magnetic field within a region is measured, the currents generating these fields can be calculated using the curl operator. In this study, magnetic fields generated within a phantom by currents passing through an external wire is measured using a magnetic resonance imaging (MRI) system, A pulse sequence that is originally design...
COMPARISON OF MAGNETIC RESONANCE ELECTRICAL IMPEDANCE TOMOGRAPHY (MREIT) RECONSTRUCTION ALGORITHMS Eyüboğlu, Behçet Murat; Boyacioglu, Rasim; Degirmenci, Evren; Eker, Gokhan (2010-04-17) Several algorithms have been proposed for image reconstruction in MREIT. These algorithms reconstruct conductivity distribution either directly from magnetic flux density measurements or from reconstructed current density distribution. In this study, performance of all major algorithms are evaluated and compared on a common platform, in terms of their reconstruction error, reconstruction time, perceptual image quality, immunity against measurement noise, required electrode size. J-Substitution (JS) and Hybr...
Magnetohydrodynamic Flow Imaging Using Spin-Echo Pulse Sequence Eroğlu, Hasan Hüseyin; SADIGHI, MEHDI; Eyüboğlu, Behçet Murat (2019-04-24) In this study, magnetohydrodynamic (MHD) flow of conductive liquids due to injection of electrical current during magnetic resonance imaging (MRI) is investigated. A spin-echo based MRI pulse sequence is proposed to image the MHD flow. Magnetic resonance (MR) phase effects of the MHD flow is related to the MRI pulse parameters and injected current. Average velocity distributions of the MHD flow are reconstructed using the MR phase images. The method is validated by numerical simulations. The reconstruction ...

Citation Formats

C. E. Acar, “Parallelization of the forward and inverse problems of electro-magnetic source imaging of the human brain,” Ph.D. - Doctoral Program, Middle East Technical University, 2003.