Publications [#268922] of G. Allan Johnson

Papers Published

1. Banson, ML; Cofer, GP; Hedlund, LW; Johnson, GA, Surface coil imaging of rat spine at 7.0 T., Magn Reson Imaging, vol. 10 no. 6 (1992), pp. 929-934, ISSN 0730-725X [1461090], [doi]
   (last updated on 2026/01/14)

   Abstract:
   An inductively coupled surface coil for imaging the rat spine at 7 T is described. This planar circular probe was made from microwave substrate to limit the size of the coil and to minimize the magnetic susceptibility. The surface coil was used as a single transmit/receive coil and as a receive-only coil with a birdcage body coil for excitation. The signal-to-noise ratio (SNR) of the probe was compared to a 5-cm birdcage coil and exceeded the birdcage coil's SNR by three to six times at superficial structures. The main advantages of the probe are an improved SNR for superficial structures and a simple design and use. Images with 50 x 50 x 500 micron voxels were obtained of the rat spine with excellent anatomical detail.

   Keywords:
   Animals • Equipment Design • Magnetic Resonance Imaging • Rats • Rats, Sprague-Dawley • Spine • anatomy & histology* • instrumentation