Publications [#268884] of G. Allan Johnson

Papers Published

1. Johnson, GA; Thompson, MB; Drayer, BP; Bone, SN, Magnetic resonance microscopy in neurologic models., Acta Radiol Suppl, vol. 369 (1986), pp. 267-268, ISSN 0365-5954 [2980471]
   (last updated on 2026/01/15)

   Abstract:
   Magnetic resonance imaging techniques have been developed to permit imaging with slice thickness less than 1 mm and pixels of 50 x 50 microns. Special purpose gradient and radiofrequency coils and three-dimensional imaging techniques enable acquisition of images with sufficient signal to noise to utilize these microscopic picture elements. Live 200 g rats were imaged enabling clear definition of gray and white matter structures. Examples include the Sylvian aqueduct and the substantia nigra. Three-dimensional microscopic images of live chick embryos enabled definition of ventricles and brain parenchyma as well as measurement of T1 over the set of 16 contiguous 1.2 mm slices.

   Keywords:
   Animals • Brain • Chick Embryo • Magnetic Resonance Imaging • Rats • anatomy & histology* • cytology • methods*