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 B1 sensitivity of the bird-cage.
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Hayes CE, Edelstein WA, Schenck JF, et al. An efficient, highly homogeneous radio-frequency coil for whole-body NMR imaging at 1.5 T. J Magn Reson 1985;63:622–8.
Gasson J, Summers IR, Fry ME, et al. Modified birdcage coils for targeted imaging. Magn Reson Imag 1995;13:1003–12.
Joseph PM, Saadi-Elmandjra MJ. Electric field measurements in cylindrical imaging coils. J Magn Reson 1987;75:199–212.
Crozier S, Luescher K, Forbes LK, et al. Optimised small-bore, high-pass resonator designs. J Magn Reson [B] 1995;109:1–11.
Ginsberg DM, Melchner MJ. Optimum geometry of saddle shaped coils for generating a uniform magnetic field. Rev Sci Instr 1970;41:122–3.
Mansfield P, McJury M, Glover P, et al. RF cavity resonator and split-resonator designs. Magn Reson Med 1991;17:10–4.
Talagala SL, Gillen J. Experimental determination of three-dimensional RF magnetic field distribution of NMR coils. J Magn Reson 1991;94:493–500.
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Hudson, A.M.J., Köckenberger, W. & Bowtell, R.W. Open access birdcage coils for microscopic imaging of plants at 11.7T. MAGMA 10, 69–74 (2000). https://doi.org/10.1007/BF02601840
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DOI: https://doi.org/10.1007/BF02601840