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Open access birdcage coils for microscopic imaging of plants at 11.7 T
A M Hudson1, W Köckenberger, R W Bowtell
1Magnetic Resonance Centre, School of Physics and Astronomy, University of Nottingham, University Park, NG7 2RD, Nottingham, UK.
Abstract:
The use of a U-shaped high-pass birdcage coil for microscopic imaging at 11.7 T has been investigated. The study was motivated by the requirement for a side access coil, permitting higher filling factors for the in-vivo imaging of plant petioles and stems. The performance of a U-shaped coil (with a cross section consisting of a 16 mm diameter semi-circle plus two 12 mm length straight sections) has been experimentally assessed, and compared both in terms of homogeneity and sensitivity to a 16 mm diameter conventional (linear) birdcage and a saddle coil of the same diameter. The U-shaped coil, which offers 12 mm width side access, has a significantly better performance than the saddle coil, whilst providing 57% of the B(1) sensitivity of the bird-cage.