1H/X and 1H/19F MRI Volume Coils

¹H/X and ¹H/¹⁹F MRI Volume Coils

Mouse Coils – Rat Coils – Rabbit Coils -Primate Coils – Custom Coils

Dual-frequency MR Coils enable MR spectroscopy and imaging techniques, including hyperpolarized nuclei.  Detailed full-wave simulations ensure the highest sensitivity, homogeneity, and isolation between channels.  B₁ field maps and SAR maps included with each coil.  Flexible design can be customized for your application and MR system.

• Efficient, easy to tune and match over a broad range of sample loadings.
• Each channel for TxRx.
• For observe / decouple – with both channels simultaneously.
• For interleaved acquisitions – with each channel used sequentially.
• Robust design, mechanical stability.

A Dual Frequency Mouse Brain Volume coil (right) for 15.2 T imager with 6 cm bore.  The high frequency (650 MHz ¹H) and tight spacing made this coil quite challenging.   A 36 mm ID x 35 mm FOV allows a surface coil receive, when desired.  Tuning included:  ¹H-¹⁹F and multi-X with a low gamma nucleus: ²³Na,¹³C, ²H, ¹⁷O, ¹⁵N, and ¹⁴N.

65 x52 mm 1H/X Dual Freq Coils

Examples of dual-frequency coils we have supplied (ID x RF length): 65 x 52 mm, 1H/X, (X=13C, 15N),@ 3 T; 1.5 T; 1 T; 0.5 T; and 0.3 T. 45 x 36 mm, 1H/X (X=31P, 13C), @ 7 T. 38 x 34 mm, 1H/X, (X=31P, 13C), @ 9.4 T. 25 x 22 mm, 1H/X, (X=31P, 13C), @ 9.4 T. 25 x 22 mm, 1H/13C, @ 1 T. 200 x 160 mm, 1H/23Na, @7 T. 38 x 55 mm, 1H/19F, @ 7 T. 32 x 25mm, 1H/19F, @9.4T

Mouse Images Obtained with a Doty ¹H/¹⁹F 38 mm Volume Coil

Pantom Images from a Dual Frequency ¹H/¹⁹F 32 mm Volume Coil.

9.4 T 1H and 19F images of tubes of water, Isoflurane, and Galden™ PFPE (perfluoropolyether) phantoms. Accordingly, the water sample is bright in the 1H scan and invisible on the 19F channel; Isoflurane, with a mixture of 19F and 1H, is visible on both channels; the 100% fluorinated PFPE is invisible on the 1H channel and bright on the 19F channel. Note that the artifacts/ghosting effect appearing for the PFPE tube is not from the coil, but rather is due to multiple 19F resonance frequencies (and a large 19F chemical shift) which causes multiple (ghost-like) images. Localization is excellent on both channelsHerrmann K-H ¹*, Pechmann N ^1,2, Reichenbach JR ¹,

¹ Medical Physics Group, IDIR, University Hospital Jena – Friedrich-Schiller University, Jena, Germany.
² University of Applied Sciences “Ernst Abbe”, Dept. of Medical Technology and Biotechnology, Jena, Germany.
*corresponding author