Figure 11

In vivo spin-echo images of spinal cord in (a) axial (b) coronal and (c) sagittal planes acquired on the day of coil implantation using the parameters T _R/T _E = 2500 ms/10 ms, image matrix = 128 × 256, slice thickness = 1 mm and NEX = 2, FOV = 45 mm × 45 mm for the axial, 35 mm × 85 mm for the coronal and 45 mm × 85 mm for the sagittal views. The intensities in the images were windowed and scaled to enhance the background signal. Notice that, during transmission, the volume coil generates an excitation field that leads to the hypointensity (long arrow) seen in the background. The implanted coil, indicated by IC on the images, generates 90° excitation field that produces a band of hyperintensity (short arrows) surrounding it. The square boxes are used to localize the regions where the images in Fig. 14 below were acquired.