Contact

Ali Aghaeifar

Address: Spemannstr. 41
72076 Tübingen
Room number: 3.B.10
Phone: +49 7071 601 941
Fax: +49 7071 601 702
E-Mail: Ali.Aghaeifar

 

Picture of Aghaeifar, Ali

Ali Aghaeifar

Position: PhD Student  Unit: Scheffler

Advanced motion correction for high-resolution EPI imaging


 

Magnetic resonance imaging (MRI) is one of the most widely used non-invasive research tools for functional imaging. However, Image quality is highly sensitive to the subject motion, and undesired motions lead to artifacts in final image. EPI is one of the most favorite pulse sequences used in functional imaging since it almost owns the best scan time and enables to images rapid physiological functions in human brain. Despite lots of benefits, EPI suffer from high degree of sensitivity to B0 field inhomogeneity. Subject motion is one cause to motivate higher local field inhomogeneity.

To provide a high quality imaging capability, in one hand, accurate control of the radio-frequency (RF) pules and gradient fields in MRI are necessary. On the other hand, facing higher fields for higher image resolution, shimming is a substantial concept in imaging to achieve homogeneous slices.

The aim of this project is to address motion artifacts in EPI imaging through prospective motion correction. We will use position feedback signal from NMR field probes, installed on the subject, to discern subject position. Having new updated position, in a real-time framework the sequence will change the slice orientation by updating the gradients. Thereafter, to overcome field inhomogeneity resulted from subject motion, shimming coefficients will be reconfigured before the next excitation.

Education:


 

Since 11.2014

PhD student at Max Planck for Biological Cybernetics & Graduate School of Neuroscience (Neural and Behavioral Science), University of Tuebingen.

09.2010 - 09.2012

M.Sc. in Electrical Engineering, Iran University of Science & Technology, Tehran, Iran

09.2006 - 08.2010

B.Sc. in Biomedical Engineering, AmirKabir University of Technology (Tehran Polytechnic), Tehran, Iran

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Posters (4):

Mirkes C, Shajan G, Aghaeifar A, Zivkovic I, Buckenmaier K and Scheffler K (April-26-2017): Dual-layered multi-channel B0 and RF coil setup for an improved shimming performance at 9.4 Tesla, 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA.
Aghaeifar A, Zivkovic I, Mirkes C, Steffen T and Scheffler K (April-25-2017): Global and dynamic shimming with the scanner’s inbuilt shim system and a custom-made multi-coil setup at 9.4 T, 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA.
Eschelbach M, Aghaeifar A, Bause J, Handwerker J, Anders J, Thielscher A and Scheffler K (April-24-2017): A Comparison of Prospective Motion Correction with 19F NMR Field Probes and an Optical Camera, 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA.
Aghaeifar A, Moghaddam AN and Scheffler K (April-24-2017): Motion simulation and correction validation using MR tagging, 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA.

Talks (3):

Aghaeifar A, Eschelbach M, Bause J, Thielscher A and Scheffler K (April-24-2017) Abstract Talk: AMoCo, a software package for prospective motion correction, 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA 219.
Aghaeifar A, Loktyushin A, Mirkes C, Thielscher A and Scheffler K (May-12-2016) Abstract Talk: Fast B0 first order inhomogeneity estimation using radial acquisition, 24th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2016), Singapore(0932).
Kühne M, Ergin MA, Klare S, Eschelbach M, Aghaeifar A, Thielscher A and Peer A (May-2015) Abstract Talk: Towards an MR-compatible Haptic Interface with Seven Actuated Degrees of Freedom, IEEE International Conference on Robotics and Automation (ICRA 2015), Seattle, WA, USA.

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Last updated: Monday, 22.05.2017