Now showing items 1-10 of 10

    • Endoluminal coils for interventional MRI procedures 

      Viskuşenko, V Nikolay (Bilkent University, 2010)
      In this study we designed endoluminal magnetic resonance imaging (MRI) coils to be used for interventional procedures under the guidance of MRI. The first coil we developed is a two-channel endocervical coil for the ...
    • Imitation of radiofrequency ablation with fiber delivered laser system for magnetic resonance guided treatment of atrial fibrillation 

      Kerse, M. Can (Bilkent University, 2010)
      Atrial Fibrillation (AF) is among the most common cardiac arrhythmias with a high risk of mortality and morbidity. As a cure several minimally invasive catheter approaches are performed under imaging guidance. These treatments ...
    • Interventional MRI: tapering improves the distal sensitivity of the loopless antenna 

      Qian, D.; El-Sharkawy, A. M. M.; Atalar, E.; Bottomley, P. A. (Wiley, 2010)
      The "loopless antenna" is an interventional MRI detector consisting of a tuned coaxial cable and an extended inner conductor or "whip". A limitation is the poor sensitivity afforded at, and immediately proximal to, its ...
    • Magnetic resonance imaging–guided coronary interventions 

      Tsekos, N. V.; Ergin, A.; Li, D.; Omary, R. A.; Serfaty, J.-M.; Woodard, P. K. (John Wiley & Sons, 2004)
      Magnetic resonance imaging (MRI) guidance for coronary interventions offers potential advantages over conventional x‐ray angiography. Advantages include the use of nonionizing radiation, combined assessment of anatomy and ...
    • Measuring local RF heating in MRI: Simulating perfusion in a perfusionless phantom 

      Akca, I. B.; Ferhanoglu, O.; Yeung, C. J.; Guney, S.; Tasci, T. O.; Atalar, E. (John Wiley & Sons, Inc., 2007)
      Purpose: To overcome conflicting methods of local RF heating measurements by proposing a simple technique for predicting in vivo temperature rise by using a gel phantom experiment. Materials and Methods: In vivo temperature ...
    • MR-trackable intramyocardial injection catheter 

      Karmarkar, P. V.; Kraitchman, D. L.; Izbudak, I.; Hofmann, L. V.; Amado, L. C.; Fritzges, D.; Young, R.; Pittenger, M.; Bulte, J. W. M.; Atalar, E. (John Wiley & Sons, 2004)
      There is growing interest in delivering cellular agents to infarcted myocardium to prevent postinfarction left ventricular remodeling. MRI can be effectively used to differentiate infarcted from healthy myocardium. MR-guided ...
    • Reverse polarized inductive coupling to transmit and receive radiofrequency coil arrays 

      Celik, H.; Atalar, E. (Wiley, 2011-06-07)
      In this study, the reverse polarization method is implemented using transmit and receive arrays to improve the visibility of the interventional devices. Linearly polarized signal sources-inductively and receptively coupled ...
    • Safety of metallic implants in magnetic resonance imaging 

      Ferhanoğlu, Onur (Bilkent University, 2005)
      Magnetic Resonance Imaging (MRI) is safe only if we take safety precautions. In the presence of a metallic implant inside the body, three types of magnetic fields encountered in MRI (Static magnetic field, radiofrequency ...
    • System for prostate brachytherapy and biopsy in a standard 1.5 T MRI scanner 

      Susil, R.C.; Camphausen, K.; Choyke, P.; McVeigh, E. R.; Gustafson, G. S.; Ning, H.; Miller, R. W.; Atalar, E.; Coleman, C. N.; Ménard, C. (John Wiley & Sons, 2004)
      A technique for transperineal high-dose-rate (HDR) prostate brachytherapy and needle biopsy in a standard 1.5 T MRI scanner is demonstrated. In each of eight procedures (in four patients with intermediate to high risk ...
    • Tracking planar orientations of active MRI needles 

      Sathyanarayana, S.; Aksit P.; Arepally, A.; Karmarkar, P. V.; Solaiyappan, M.; Atalar, E. (John Wiley & Sons, Inc., 2007)
      Purpose: To determine and track the planar orientation of active interventional devices without using localizing RF microcoils. Materials and Methods: An image-based tracking method that determines a device's orientation ...