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Dr.-Ing. Ali Caglar Özen

Medical Physics
Department of Radiology
University Medical Center Freiburg

Killianstr. 5a
79106 Freiburg

Tel.: +49 761 270-93910
E-Mail

Biomedical imaging systems, RF & Microwave Electronics, Electromagnetics

In particular,

  • Novel RF Coils and Systems
  • Electromagnetic Compatibility
  • MR Safety
  • Interventional MRI
  • MRI of X-Nuclei
  • Ultra-short T2 MRI

Journal Articles

  1. Ilbey S, Jung M, Emir U, Bock M, Özen AC. Characterizing Off-center MRI with ZTE. Z. Med. Phys. 2022;0:1–8 doi: ZMEDPHYS-D-22-00099R2.
  2. Shen X, Özen AC, Monsivais H, et al. High-Resolution 3D Ultra-Short Echo Time MRI with Rosette k-Space Pattern for Brain Iron Content Mapping. bioRxiv 2022:2022.08.24.505201 doi: 10.1101/2022.08.24.505201.
  3. Ozen AC, Lottner T, Reiss S, Heidt T, Zur Muhlen C Von, Bock M. Real-Time Control of Active Catheter Signals for Better Visual Profiling During Cardiovascular Interventions Under MRI Guidance. IEEE Access 2022;10:20581–20589 doi: 10.1109/ACCESS.2022.3151804.
  4. Özen AC, Spreter F, Schimpf W, et al. Scalable and modular 8‐channel transmit and 8‐channel flexible receive coil array for 19F MRI of large animals. Magn. Reson. Med. 2022 doi: 10.1002/mrm.29490.
  5. Ilbey, S, Jungmann, PM, Fischer, J, Jung, M, Bock, M, Özen, AC. Single point imaging with radial acquisition and compressed sensing. Magn Reson Med. 2022; 00: 1– 12. doi:10.1002/mrm.29156
  6. Tesfai, A. S. et al. Inductively Coupled Intraoral Flexible Coil for Increased Visibility of Dental Root Canals in Magnetic Resonance Imaging. Invest. Radiol. Publish Ah, (2021).
  7. Özen, A. C. et al. Design of an Intraoral Dipole Antenna for Dental Applications. IEEE Trans. Biomed. Eng. 1, 1–1 (2021).
  8. Lottner, T., Reiss, S., Bitzer, A., Bock, M. & Özen, A. A Transfer Function Measurement Setup With an Electro-Optic Sensor for MR Safety Assessment in Cascaded Media. IEEE Trans. Electromagn. Compat. 63, 662–672 (2021).
  9. Fischer J, Özen AC, Ilbey S, et al. Sub-millisecond 2D MRI of the vocal fold oscillation using single-point imaging with rapid encoding. Magn. Reson. Mater. Physics, Biol. Med. 2022;35:301–310 doi: 10.1007/s10334-021-00959-4.
  10. Fischer, J. et al. Magnetic resonance imaging of the vocal fold oscillations with sub‐millisecond temporal resolution. Magn. Reson. Med. 83, 403–411 (2020).
  11. Tesfai, A. S. et al. Multi-parameter Analytical Method for B1 and SNR Analysis (MAMBA): An open source RF coil design tool. J. Magn. Reson. 319, 106825 (2020).
  12. Özen, A. C. et al. Ensuring safety and functionality of electroglottography measurements during dynamic pulmonary MRI. Magn. Reson. Med. 76, 1629–1635 (2016).
  13. Reiss, S. et al. Artifact quantification of venous stents in the MRI environment: Differences between braided and laser-cut designs. Phys. Med. 88, 1–8 (2021).
  14. Traser, L. et al. Respiratory kinematics and the regulation of subglottic pressure for phonation of pitch jumps - a dynamic MRI study. PLoS One 15, e0244539 (2020).
  15. Stephan, S., Reiss, S., Lottner, T., Özen, A. C. & Bock, M. Catheter-based Arterial Input Function Determination for Myocardial Perfusion Measurements. Z. Med. Phys. 31, 65–72 (2021).
  16. Reiss, S. et al. Analysis of the RF Excitation of Endovascular Stents in Small Gap and Overlap Scenarios Using an Electro-Optical E-field Sensor. IEEE Trans. Biomed. Eng. 68, 783–792 (2021).
  17. Reiss, S. et al. Magnetic Resonance Imaging of Venous Stents at 1.5 T: Susceptibility Artifacts and Radiofrequency Shielding. Invest. Radiol. 55, 741–746 (2020).
  18. Özen, A. C., Silemek, B., Lottner, T., Atalar, E. & Bock, M. MR safety watchdog for active catheters: Wireless impedance control with real-time feedback. Magn. Reson. Med. 84, 1048–1060 (2020).
  19. Heidt, T. et al. Real-time magnetic resonance imaging - guided coronary intervention in a porcine model. Sci. Rep. 9, 8663 (2019).
  20. Bock, M. et al. Reply to Letter to the Editor: ‘Nomenclature for real-time magnetic resonance imaging’. Magn. Reson. Med. 81, 1485 (2019).
  21. Özen, A. C., Lottner, T. & Bock, M. Safety of active catheters in MRI: Termination impedance versus RF-induced heating. Magn. Reson. Med. 81, 1412–1423 (2019).
  22. Özen, A. C., Atalar, E., Korvink, J. G. & Bock, M. In vivo MRI with Concurrent Excitation and Acquisition using Automated Active Analog Cancellation. Sci. Rep. 8, 10631 (2018).
  23. Kurzhunov, D., Borowiak, R., Reisert, M., Özen, A. C. & Bock, M. Direct estimation of 17 O MR images (DIESIS) for quantification of oxygen metabolism in the human brain with partial volume correction. Magn. Reson. Med. 80, 2717–2725 (2018).
  24. Dadakova, T., Krafft, A. J., Özen, A. C. & Bock, M. Optimization of acoustic radiation force imaging: Influence of timing parameters on sensitivity. Magn. Reson. Med. 79, 981–986 (2018).
  25. Traser, L. et al. Respiratory dynamics in phonation and breathing-A real-time MRI study. Respir. Physiol. Neurobiol. 236, 69–77 (2017).
  26. Kurzhunov, D. et al. 3D CMRO2 mapping in human brain with direct 17O MRI: Comparison of conventional and proton-constrained reconstructions. Neuroimage 155, 612–624 (2017).
  27. Özen, A. C., Bock, M. & Atalar, E. Active decoupling of RF coils using a transmit array system. MAGMA 28, 565–76 (2015).
  28. Özen, A. C., Ludwig, U., Öhrström, L. M., Rühli, F. J. & Bock, M. Comparison of ultrashort echo time sequences for MRI of an ancient mummified human hand. Magn. Reson. Med. 75, 701–8 (2016).

Conference Papers

  1. Özen AC et al. (2022) Light Coils: MRI with Modular RF Coils Using Optical Power and Data Transmission. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 186
  2. Ilbey S, et al., Özen AC (2022) Near Metal MRI with Compressed Sensing PETRA. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 955
  3. Sreereddy M, et al., Özen AC (2022) Optimization and Analysis of Shielded Loop Resonators towards Modular Coil Arrays. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 2256
  4. Tesfai A, et al., Özen AC (2022) MR Safety of Inductively-coupled and Conventional Intra-oral Coils. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 2636
  5. Bock M, et al. Özen AC (2022) Chemical Shift Artifact Correction for 19F MRI using Spectral Hadamard Encoding. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1008
  6. Özen AC et al. (2022) Scalable and Modular 8-Channel Transmit and 8-Channel Flexible Receive Coil Array for 19F-MRI of Myocardial Infarction Studies in Large Animals. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1570
  7. Ilbey S, Özen AC (2022) Sampling Mask Optimization for Compressed Sensing PETRA MRI. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1707
  8. Shen X, Özen AC, et al. (2022) Myelin Imaging Using 3D Dual-echo Ultra-short Echo Time MRI with Rosette k-Space Pattern. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 5009
  9. Shen X, Özen AC, et al. (2022) High Resolution 3D Ultra-Short Echo Time MRI with Rosette k-Space Pattern for Brain Iron Content Mapping. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 5001
  10. Song H, Özen AC, et al. (2022) Quantification of CMRO2in Posterior Fossa Area Using Dynamic17O-MRI. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 3839
  11. Bozymski B, et al. (2022) Ultra-Short Echo Time 31P 3D MRSI at 3T with Novel Rosette k-space Trajectory. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1783
  12. Karnik A, et al. (2022) Quantitative Susceptibility Mapping (QSM) Using High-resolution Ultra-Short Echo Time (UTE) MRI with Rosette k-space Pattern. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1982
  13. Monsivais H, et al. Iron Imaging with 3D Multi-Gradient Recalled Echo (3D-mGRE) and 3D Ultra-short Echo (3D-UTE) Sequences: A Phantom Comparison Study. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1534
  14. Reiss S, et al. (2022) First in vivo Myocardial Perfusion Measurements using Intra-arterial Spin Labeling during MR-guided Coronary Interventions in Pigs. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 211
  15. Tesfai A, et al. (2022) Comparison of ultra-high field MRI of ancient remains at 9.4T and 3T. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 2098
  16. Villareal C, et al. (2022) Compressed sensing and the use of 3D UTE acquisition for high-resolution accelerated 23NA imaging at 3T. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1495
  17. Ooms N, et al. (2022) Pulmonary imaging Using 3D Dual-Echo FID Ultra-short Echo Time MRI with Rosette k-space Pattern: Introduction and Feasibility. In: Proceedings of the 30th scientific meeting, International Society for Magnetic Resonance in Medicine. p 1040
  18. Ilbey S, Fischer J, Bock M, Özen A (2021) Compressed Sensing PETRA MRI. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine. p 908
  19. Özen A, Reiss S, Lottner T, Yildirim DK, Kocaturk O, Bock M (2021) MR Safety Assessments of Active Implantable and Interventional Devices in a Single Measurement Setup. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 364
  20. Özen A, Idiyatullin D, Gregor A, Jungst S, Kobayashi N, Groenke B, Bock M, Garwood M, Nixdorf D (2021) Novel Intraoral Dipole Antenna for Dental Applications. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 131
  21. Bock M, Lottner T, Özen A (2021) A Sip in the Bore: How to Make Coffee with an MRI System. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 4281
  22. Waescher K, Reiss S, Özen A, Lottner T, Bock M (2021) Towards Catheter-based Intra-Arterial Spin Labeling for Perfusion Measurements. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 4244
  23. Özen A, Spreter F, Heidt T, von zur Muehlen C, Bock M (2021) A Dedicated 17O Rx Array to Assess Renal Metabolism of Donor Kidneys. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 1809
  24. Fischer J, Özen A, Echternach M, Traser L, Richter B, Bock M (2021) 2.5D MRI of the Vocal Fold Oscillation using Single Point Imaging with Rapid Encoding. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 905
  25. Tesfai A, Vollmer A, Özen A, Semper-Hogg W, Ludwig U, Bock M (2021) Intra-oral flexible coil for improved visibility of dental root canals in MRI. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 3946
  26. Tesfai A, Fischer J, Özen A, Eppenberger P, Ohrstrom L, Ruehli F, Ludwig U, Bock M (2021) MRI and CT in an Ancient Child Mummy: Contrast Combination to Increase Tissue Differentiation. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 4076
  27. Song H, Akin B, Fischer J, Özen A, Schumann S, Bock M (2021) Measuring CMRO2 in Brain Subcortical Structures Using Dynamic 17O-MRI. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 1796
  28. Lottner T, Fischer J, Reiss S, Bielak L, Heidt T, Özen A, Thielmann J, von zur Muehlen C, Bock M (2021) Multi-Echo GRASP for Cardiac T2*-Relaxometry. In: Proceedings of the 29th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 3602
  29. Özen A, Fischer J, Song H, Taege Y, Schuch C, Schutter R, Moers C, Borra R, Bock M (2020) A Dedicated 17O Rx Array to Assess Renal Metabolism of Donor Kidneys. In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 4061
  30. Ilbey S, Garwood M, Bock M, Özen A (2020) Optimal Flip Angle Formula for SWIFT and CEA (Concurrent Excitation and Acquisition) MRI. In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 3689
  31. Reiss S, Haas L, Lottner T, Özen A, Polei S, Bitzer A, Bock M (2020) Modeling the RF-induced Heating of Stents with an Analytical Model, Electro-Optic E-field Measurements and MR Thermometry. In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4200
  32. Song H, Taege Y, Fischer J, Özen A, Bock M (2020) Regional Analysis of CMRO2 in Human Brain Using Dynamic 17O-MRI. In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 482
  33. Lottner T, Reiss S, Haas L, Erhardt J, Özen A, Bielak L, Schuettler M, Bock M (2020) RF Heating of a 64-Channel Implantable Electrode Grid: Simulation and Temperature Measurements. In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 4199
  34. Fischer J, Özen A, Echternach M, Richter B, Bock M (2020) Sub-millisecond 2D MRI of the Vocal Fold Oscillation using Single Point Imaging with Rapid Encoding (SPIRE). In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 615
  35. Stephan S, Reiss S, Lottner T, Özen A, Bock M (2020) Towards Quantitative Myocardial Perfusion: Catheter-Based Arterial Input Function Measurements with Flow-Normalization. In: Proceedings of the 28th scientific meeting, International Society for Magnetic Resonance in Medicine, Virtual. p 4151
  36. Akin B, Özen A (2019) Microstrip Array Insert for Head Coils: Towards Layer fMRI at High Fields. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 371
  37. Taege Y, Fischer J, Özen A, Song H, Schuch C, Schutter R, Moers C, Borra R, Bock M (2019) Protocol Optimization for Functional 17O-MRI of Donor Kidneys at 3T. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4223
  38. Fischer J, Özen A, Echternach M, Richter B, Bock M (2019) Highspeed Imaging of the Vocal Folds Oscillations with Image-based Motion Correction. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4580
  39. Özen A, Silemek B, Lottner T, Atalar E, Bock M (2019) MR Safety Watchdog for Safe Active Catheters: Wireless Impedance Controller with Real-time Feedback. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 792
  40. Reiss S, Lottner T, Özen A, Bock M, Bitzer A (2019) On the RF Excitation of Overlapping Stents: Electro-optical E-field Measurements. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4192
  41. Erhardt J, Lottner T, Martinez J, Özen A, Schuettler M, Stieglitz T, Ennis D, Bock M (2019) Influence of the Electrode Diameter on Radio Frequency-induced Heating in MRI. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4191
  42. Lottner T, Erhardt J, Reichert A, Özen A, Bielak L, Schuettler M, Bock M (2019) Avoiding Systematic Errors of Fiber-optic Temperature Probes: MR Thermometry for Safety Assessment of Small Planar Metallic Structures. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4185
  43. Özen A, Lottner T, Reiss S, Bitzer A, Bock M (2019) Safety Assessments in the Cascaded Media Using an Electro-optic Sensor-based Transfer Function Measurement Setup. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4184
  44. Özen A, Lottner T, Bock M (2019) Safety of active catheters in MRI: Termination impedance versus RF-induced heating. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 4176
  45. Stephan S, Reiss S, Lottner T, Özen AC, Bock M (2019) Catheter-based Arterial Input Function for Quantitative Perfusion Measurements with Intra-arterial Injection. In: Proceedings of the 27th scientific meeting, International Society for Magnetic Resonance in Medicine, Montreal, QC. p 3840
  46. Özen AC, Akin B, Bock M (2018) Safety of Active Catheters in MRI: Termination Impedance vs. RF-induced Heating. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 4429
  47. Özen AC, Akin B, Bock M (2018) Concurrent Excitation and Acquisition for the Ultimate MRI Experience: Silent, Implant Friendly, Nearly 100% Efficient. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 4429
  48. Reiss S, Heidt T, Lottner T, Özen AC, et al. (2018) Fully MR-Guided Implantation of a Bioresorbable Scaffold in the Left Coronary Artery of a Pig at 3T. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 601
  49. Fischer J, Abels T, Özen AC, et al. (2018) Highspeed Imaging with Sub-millisecond Temporal Resolution of the Vocal Folds Oscillations using EGG-Gated Gradient Echo with Rapid Phase Encoding. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 383
  50. Reiss S, Lottner T, Özen AC, et al. (2018) Electro-Optic E-field Mapping of Medical Implants with High Spatial Resolution: Resonant Excitation of Metallic Stents. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 1474
  51. Lottner T, Reiss S, Özen AC, et al. (2018) Validating and Measuring Transfer Functions of Straight Wires using a Combination of an Electro-optic Field Sensor and Simulation. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 642
  52. Kurzhunov D, et al., Özen AC, Bock M. (2018) Quantification of Oxygen Metabolism in Human Brain: Comparison of Direct 17O with Indirect 1H MR Method. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 3689
  53. Agazi T, Fischer J, Özen AC, et al. (2018) Effects of Reduced Dead Times on the SNR of Tissue with Short T2* values. In: Proceedings of the 26th scientific meeting, International Society for Magnetic Resonance in Medicine, Paris, France. p 5193
  54. Özen AC, Lottner T, Reiss S, Krafft A, Heidt T, von zur Muhlen C, Bock M (2017) Operator Controlled Illumination of Active Catheter Tips Using a Variable Attenuator. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 741
  55. Özen AC, Korvink J, Atalar E, Bock M (2017) In Vivo MRI with Concurrent Excitation and Acquisition Using Dynamic Analog Cancellation with Real-Time Feedback. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 1047
  56. Özen AC, Jouda M, Korvink J, Bock M (2017) Full Digital Cancellation-Based NMR with Concurrent Excitation and Acquisition Using a Lock-In Amplifier. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 5593
  57. Reiss S, Özen AC, Lottner T, Heidt T, Krafft A, Besch L, Klaus D, von zur Muhlen C, Bock M (2017) Active Catheter Tracking for MR-Guided Percutaneous Coronary Intervention at 3T: Initial Results in a Pig Model. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 2611
  58. Lottner T, Özen AC, Reiss S, Heidt T, Krafft A, Besch L, Klaus D, von zur Muhlen C, Bock M (2017) Of Active Catheters and Guidewires: How Do Guidewires Affect the Tracking Signal Intensity? In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 5560
  59. Fischer J, Özen AC, Kurzhunov D, Marco R, Tesfai A, Ruhli F, Ludwig U, Bock M (2017) Cross-Modality MR Image Reconstruction: CT-Constrained Anisotropic Diffusion to Preserve Edge Information in MRI of an Ancient Mummified Hand. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 1351
  60. Kurzhunov D, Borowiak R, Marco R, Krafft A, Özen AC, Bock M (2017) CMRO2 Quantification in Human Brain with Direct 17O-MRI: Profile Likelihood Analysis for Optimization of Temporal Resolution. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 568
  61. Kurzhunov D, Borowiak R, Özen AC, Bock M (2017) 3D CMRO2 Mapping in Human Brain with Direct 17O-MRI: Comparison of Methods for Image Reconstruction and Partial Volume Correction. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 3602
  62. Tesfai A, Fischer J, Özen AC, Bock M (2017) Comparison of Different RF Coil Designs for Short T2* Samples. In: Proceedings of the 25th scientific meeting, International Society for Magnetic Resonance in Medicine, Honolulu, Hawai'i. p 4300  
  63. Özen AC, Korvink J, Atalar E, Bock M (2016) In Vivo Concurrent Excitation and Acquisition MRI with Self-Referenced Active Decoupling. In: Proceedings of the 24th scientific meeting, International Society for Magnetic Resonance in Medicine, Singapore. p 2179
  64. Özen AC, Korvink J, Bock M  (2016) Concurrent Excitation and Acquisition in Steady State: T1-Modulation Effects of Frequency Sweep. In: Proceedings of the 24th scientific meeting, International Society for Magnetic Resonance in Medicine, Singapore. p 1809
  65. Salim M, Ozen AC, Bock M, Atalar E (2016) Detection of Mr Signal During Rf Excitation Using Full Duplex Radio System. In: Proceedings of the 24th scientific meeting, International Society for Magnetic Resonance in Medicine, Singapore. p 3636
  66. Dadakova T, Özen AC, Krafft A, Korvink J, Bock M (2016) Phase Artifact Correction for Improved ARFI Displacement Mapping Using a Short FID Navigator. In: Proceedings of the 24th scientific meeting, International Society for Magnetic Resonance in Medicine, Singapore. p 3611
  67. Özen AC, et al. (2015) Active Decoupling of RF Coils: Application to 3D MRI with Concurrent Excitation and Acquisition. In: Proceedings of the 32nd ESMRMB Anual Meeting, Edinburgh, UK. 
  68. Özen AC, et al. (2015) Which Technique is Best? Optimizing MRI of an Ancient Mummified Human Hand. In: Proceedings of the Evolutionary Medicine Conference, Zurich, Switzerland.
  69. Özen AC, et al.  (2015) Ensuring Safety and Functionality of Electroglottography Measurements During Lung MRI. In: Proceedings of the 23rd scientific meeting, International Society for Magnetic Resonance in Medicine,Toronto, Canada.
  70. Özen AC, et al. (2015) Active Decoupling of RF Coils: Application to 3D MRI with Concurrent Excitation and Acquisition. In: Proceedings of the 23rd scientific meeting, International Society for Magnetic Resonance in Medicine,Toronto, Canada.
  71. Dadakova T, et al. (2015) MR-ARFI for the Quantification of Tissue Elastic Properties. In: Proceedings of the 23rd scientific meeting, International Society for Magnetic Resonance in Medicine,Toronto, Canada.
  72. Özen AC, et al. (2014) Comparison of three ultrashort echo time sequences in MRI of an ancient Mummified hand. In: Proceedings of the DGMP Annual Meeting, Zurich, Switzerland
  73. Özen AC, et al.  (2014) Comparison of UTE, PETRA and SPI sequences in MRI of Ancient Remains. In: Proceedings of the 22nd scientific meeting, International Society for Magnetic Resonance in Medicine, Milano, Italy.
  74. Özen AC, et al.  (2014) "Be nice to your gradients!" Useful gradient modifications for SPI. In: Proceedings of the 22nd scientific meeting, International Society for Magnetic Resonance in Medicine, Milano, Italy.
  75. Ludwig U, et al.  (2014) ZTE MRI enables imaging of Egyptian Mummy: A comparison to CT and THz imaging. In: Proceedings of the 22nd scientific meeting, International Society for Magnetic Resonance in Medicine, Milano, Italy.
  76. Pavlina JM, et al.  (2014) Conductivity Effects on RF Surface Coils used for MR-Guided HIFU of the Prostate. In: Proceedings of the 22nd scientific meeting, International Society for Magnetic Resonance in Medicine, Milano, Italy.
  77. Demir T, et al.  (2014) Cylindrical Encoding in MRI. In: Proceedings of the 22nd scientific meeting, International Society for Magnetic Resonance in Medicine, Milano, Italy.
  78. Özen AC, et al.  (2013) Decoupling of Radio Frequency Coils using a Transmit Array System: Application to Magnetic Rezonans Imaging with Concurrent Excitation and Acquisition (CEA) and Ultra-short Echo-time Imaging (UTE). In: Proceedings of the 21st scientific meeting, International Society for Magnetic Resonance in Medicine, SLC, UTAH, USA.
  79. Acikel V, et al.  (2013) A Novel MRI Based Electrical Properties Measurement Technique. In: Proceedings of the 21st scientific meeting, International Society for Magnetic Resonance in Medicine, SLC, UTAH, USA.
  80. Özen AC, et al.  (2012) Detection of MRI Signal During Transmission Using a Transmit Array System. In: Proceedings of the 20th scientific meeting, International Society for Magnetic Resonance in Medicine, Melbourne, Australia.
  81. Özen AC, et al.  (2011) A practical measurement technique and setup for determination of electromagnetic properties of MRI phantoms. In: Proceedings of the Turkish Magnetic Resonance Society annual meeting, Istanbul, Turkey.

Lectures, Invited Talks and Seminars

  1. Active Device Design for MRI-Guided Cardiovascular Catheterizations
  2. MRI of Tissue and Samples with Ultra-short T2 Values
  3. Electromagnetism in Biomedical Imaging (Lecture Series)

Book Chapters

Theses

Ali Caglar Özen was born in Turkey in 1988. He studied Electrical and Electronics Engineering between 2006 and 2010 at Bilkent University in Ankara, where he also obtained his Master’s degree at the same department in 2013. He earned his Ph.D. degree from the Institute of Microstructure Technology at Karlsruhe Institute of Technology, Germany, in 2017.

In 2013 he joined the Department of Radiology, Medical Physics at the University Medical Center Freiburg as a research assistant. In 2017 he became a Post-doctoral Fellow at the German Consortium for Translational Cancer Research Partner Site Freiburg. Since 2021, he has been leading projects in the fields of MR safety, RF coil development for MRI, electromagnetic compatibility and MRI of tissue with ultra short T2 values in Medical Physics department of University Medical Center Freiburg. He has also been involved in scientific research and technology development in the fields of fast MRI, cardiovascular interventions, and MRI of myocardial infarction, MRI of 17O and 19F-labeled substances.

Dr. Özen is a member of the International Society of Magnetic Resonance in Medicine and is a School of Oncology Fellow of the German Consortium for Translational Cancer Research (DKTK). He was the recipient of the young investigator award of the European Society of Magnetic Resonance in Medicine and Biology in 2015. In 2019, he received the Lasby Fellowship from the University of Minnesota and joined the UMN as a visiting faculty. In 2021, he was awarded Senior Member title by the IEEE for his early career achievements.

He is the father of Umay (born in 11.12.2017) and the spouse of Seval Özen.

Current Research