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MRI Coil Development

MRI Coil Development

16-channel Transmit Array

16-Channel Transmit Array
This is a prototype coil developed in collaboration with the NRI in Incheon, South Korea, that can be used for parallel transmission and reception. It is driven by eight independent power amplifiers, each transmit channel is then fed to two coils. In receive mode, 16 completely independent receive loops are available.

Sodium Coil Array

Sodium Coil Array
This coil array, intended for imaging sodium nuclei at 9.4T, consists of a transmit birdcage and an eight channel receive array. Both coils can be split for easy patient positioning and are based on the design of a 3T MR-PET coil array from Siemens.

Modified 8 channel pTX Coil

Modified 8-Channel pTX Coil
This single channel transmit, 8-channel receive coil fabricated by Rapid Biomedical has been modified for parallel transmission systems. It now allows the use of eight independent transmitters as well as eight receivers.

Body Coil for Small Animals

Body Coil for Small Animals
Designed as a classical birdcage, this coil is installed in the 9.4T animal scanner. It operates in conjunction with any receive only coil array in the same manner as the coil setup in modern clinical MRI systems.

Animal Coil for Clinical Scanner

Animal Coil for Clinical Scanner
To investigate the usefulness of clinical human systems for small animal imaging, this 3T solenoid coil has been designed. It allows imaging of rats under anesthesia in a 3T Tim Trio system.

Novel multi-tuned RF coil/antenna designs

Contact persons: Dr Chang-Hoon Choi and Dr Suk-Min Hong

1H/31P Human head coil

Coil Development

(a) shows the probe configuration of the double-resonant helmet coil and (b) shows the block diagram of the RF chain consisting of quadrature hybrids and resonant traps tuned to 1H and 31P.

For more detailed information see: S.-M. Hong, C.-H. Choi, N.J. Shah, J. Felder, 2019, Design of a double-resonant helmet coil for 1H/31P at 3T MRI, Phys. Med. Biol., 64, pp. 035003.

1H/31P Human head coil diagram

Simulation model showing the probe configuration: (a, b) simulation model of quadrature bent dipole antenna and four-loop 31P coil with phantom and head mesh, (c) simulation model of single-tuned birdcage coil, (d) photo of quadrature bent dipole antenna and four-loop 31P array, (e) schematic of bent dipole antenna, (f) the 2D representation of the four-loop 31P array, (g) block diagram of the RF interface.

For more detailed information see: S.-M. Hong, C.-H. Choi, A.W. Magill, N.J. Shah, J. Felder, 2018, Design of a quadrature 1H/31P coil using bent dipole antenna and 4-channel loop at 3T MRI, IEEE Trans. Med. Imaging, 37, pp. 2613-2618.

1H/23Na Animal coil

1H/23Na Animal coil

Photographs, dimensions and schematic diagram of (a) the proposed 90° four-ring double-tuned birdcage coil, (b) the single-tuned 1H and 23Na birdcage coil, (c) the large four-ring birdcage coil.

For more detailed information see: Y. Ha1, C.-H. Choi1, W. Worthoff, A. Shymanskaya, M. Schöneck, A. Willuweit, J. Felder and N.J. Shah, 2018, Design and in vivo use of a folded four-ring double-resonant quadrature birdcage coil for rat brain sodium imaging at 9.4T, J. Magn. Reson., 286, pp. 110-114.

1H/23Na Animal coil

A schematic diagram containing component values of a quadrature-enhanced dual-tuned coil (a), a photo of the double-tuned coil assembled with an animal bed and a phantom (b).

For more detailed information see: Y. Ha1, C.-H. Choi1, N.J. Shah, 2018, Development and implementation of a PIN-diode controlled, quadrature-enhanced, double-tuned RF coil for sodium MRI, IEEE Trans. Med. Imaging, 37, pp. 1626-1631.

1H/19F Animal coil

1H/19F Animal coil

Photograph (left) of an actively switchable 1H/19F double-tuned quadrature surface coil and its equivalent circuit diagram (right) including component values.

For more detailed information see: 5. C.-H. Choi, S. Hong, Y. Ha and N.J. Shah, 2017, Design and construction of a novel 1H/19F double-tuned coil system using PIN-diode switches at 9.4T, J. Magn. Reson., 279, pp.11-15.

Additional Information

Contact Person

Jörg Felder, PhD

Avdo Celik, Dipl.-Ing.




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