Now showing items 1-20 of 13028

    • Localizing the excitation to reduce scan time using nonlinear gradient fields 

      Kopanoğlu, Emre; Yılmaz, Uğur; Akın, Burak; Açıkel, Volkan; Atalar, Ergin (ISMRM, 2012)
      elatively low SAR, but they cannot excite local regions and therefore causes long scan times. Although small volumes can be excited using multi-dimensional excitation pulses, such pulses are long and/or have relatively ...
    • Decreasing SAR of a multi-dimensional central brightening inhomogeneity correction pulse using nonlinear gradient fields and VERSE 

      Kopanoğlu, Emre; Gökhalk, Yıldıray; Yılmaz, Uğur; Açıkel, Volkan; Atalar, Ergin (ISMRM, 2012)
      To correct for B1 inhomogeneity artifacts, multi-dimensional pulses are widely used. However, such pulses increase SAR significantly. In this study, we compare, and combine two SAR reduction methods, the variable rate ...
    • VERSE optimized multi-channel transmission 

      Mahçiçek, Davut I.; Bayındır, H. Ö.; Demir, Taner; Atalar, Ergin (ISMRM, 2012)
      Specific Absorption Rate (SAR) and B1 inhomoeneity are two main problems of high field Magnetic Resonance Imaging. Multi-channel transmit systems may be used to fight againts inhomogeneity problems. Variable Rate Selective ...
    • Interactive real time inductively coupled catheter coil tracking using a transmit array system 

      Yılmaz, Uğur; Pan, L.; Atalar, Ergin (ISMRM, 2012)
      Inductively coupled catheter coils are advantageous for interventional procedures, since they require no connection to MR scanners, which reduces the difficulties such as device-handling and RF safety problems faced with ...
    • Mode matrix tranceiver surface coil 

      Demir, Taner; Türk, Esra Abacı; Atalar, Ergin (ISMRM, 2012)
      The concept of a mode matrix tranceiver surface coil for transmit array system is introduced. The coil performance is experimentally tested and the concept of mode matrix transmission is verified.
    • Detection of MR signal during RF excitation using a transmit array system 

      Özen, Ali Çağlar; Ertan, Koray; Atalar, Ergin (ISMRM, 2012)
      Concurrent RF transmission and signal reception is significant for applications including imaging species with ultra short T2 values, and measurement of spin properties during excitation. In this study, magnetic field ...
    • Analysis of B1 mapping by Bloch Siegert Shift 

      Türk, Esra Abacı; İder, Yusuf Ziya; Atalar, Ergin (ISMRM, 2012)
      In this study, B1 mapping by the Bloch-Siegert shift is analyzed with simulations and experiments. The importance of the pulse duration and the crusher gradients are investigated. It is shown that the off-resonance pulse ...
    • Reliability-aware 3D chip multiprocessor design 

      Öztürk, Özcan; Aktürk, İsmail (IEEE, 2012-06)
      Ability to stack separate chips in a single package enables three-dimensional integrated circuits (3D ICs). Heterogeneous 3D ICs provide even better opportunities to reduce the power and increase the performance per unit ...
    • Multipole radiation in quantum domain 

      Shumovsky, Alexander S.; Can, M. Ali; Soykal, Öney (Springer, 2003)
      We review recent results based on the application of spherical wave representation to description of quantum properties of multipole radiation generated by atomic transitions. In particular, the angular momentum Angular ...
    • Physics and applications of defect structures in photonic crystals 

      Özbay, Ekmel; Bayındır, Mehmet (Springer, 2003)
      We propose and demonstrate a new type of propagation mechanism for electromagnetic waves in photonic band gap materials. Photons propagate through coupled cavities due to interaction between the highly localized neighboring ...
    • Different scattering regimes in two-dimensional Bose-Einstein condensates 

      Tanatar, Bilal (Springer, 2003)
      Motivated by the recent efforts to produce low-dimensional condensates, we study the ground-state density profiles of two-dimensional Bose-Einstein condensed atoms at zero temperature within a mean-field theory. The interplay ...
    • Preface 

      Togan, Sübidey; Balasubramanyam, V. N. (Palgrave Macmillan, 2001)
      This book offers a comparative study of the Central and Eastern European and Turkish economies that analyses the implications of EU enlargement. The contributors discuss issues related to the creation of a legal infrastructure ...
    • The linear assignment problem 

      Akgül, Mustafa (Springer, 1992)
      We present a broad survey of recent polynomial algorithms for the linear assignment problem. They all use essentially alternating trees and/or strongly feasible trees. Most of them employ Dijkstra’s shortest path algorithm ...
    • Preface 

      Akgül, Mustafa; Hamacher, H. W.; Tüfekçi, S. (Springer, 1992)
    • Preface 

      Hakioğlu, Tahsin Tuğrul; Shumovsky, Alexander S. (Springer, 1997)
    • Preface 

      Kulik, Igor O.; Ellialtıoğlu, Recai (Springer, 2000)
    • Introduction 

      Togan, Sübidey; Balasubramanyam, V. N. (Palgrave Macmillan, 2001)
      The papers that make up this volume were presented at the conference on Turkey, Central and East European (CEE) countries and the EU, held at Bilkent University, Ankara, Turkey, on 9–10 March 1996. A legal structure that ...
    • Preface 

      Erdentuğ, Aygen; Colombijn, F. (Routledge, 2002)
    • Introduction 

      Koray, Semih; Sertel, M. R. (Springer, 2003)
      A main feature that distinguishes the human species from others on earth can perhaps be best summarized as its ability to design. Other attributes distinguishing humans from other living beings can be regarded as derivatives ...
    • Preface 

      Shumovsky, Alexander S. (Springer, 2003)