Dipole arrays

For precision imaging at ultra-high field, multi-channel arrays of radiative dipole antennas^1,2 provide an optimal solution. We offer dipole arrays for different imaging targets. Dipoles have proven to be a good choice to be integrated with high density receive loop arrays for accelerated imaging. Previous solutions have been successfully applied in cardiac imaging³, prostate imaging⁴, breast imaging⁵, and brain imaging⁶. We have extensive experience with safety validation of dipole antennas at ultrahigh field (7T and 10.5T).

Current portfolio of dipole array coils:

Dipole body array
Imaging target: abdomen, heart, prostate
Geometry: flexible leather former
Tx channels: 8
Rx channels: 8-64
Field strengths: 3T, 7T, 10.5T and beyond

Dipole breast array
Imaging target: breast
Geometry: rigid former, prone position
Tx channels: 5, can be modified for single Tx mode
Rx channels: 30
Field strength: 7T and 10.5T (MIRAC_LE project FETOPEN)

References
¹Raaijmakers, The Fractionated Dipole Antenna: A New Antenna for Body Imaging at 7 Tesla MRM 2016.
²Steensma et al., Optimization and validation of dipole antenna geometry for 10.5T, ISMRM 2018.
³Steensma, An 8‑channel Tx/Rx dipole array combined with 16 Rx loops for high‑resolution functional cardiac imaging at 7T, MAGMA 2018
⁴Steensma, Comparing Signal-to-Noise Ratio for Prostate Imaging at 7T and 3T, jMRI 2019.
⁵Krikken et al., Homogeneous B1+ for bilateral breast imaging at 7T using a five dipole transmit array merged with a high density receive loop array, NMR in Biomed 2018.
⁶Haghnejad, S.A., Flexible dipoles for multitransmit headneck MRI at 7T, eSMRMb 2016