For an image intensifier (hereafter I.I.) , one key component of cineangiographic system, further grading up of its image (especially, the improvement of image noise characteristics) is requested recently. Now, a I.I., whose image noise and spatial frequency (MTF) characteristics are improved by an improved input phosphor screen, has been newly developed (hereafter a Super Metal I.I.). We assembled this type of I.I. into a cine fluorographic apparatus, evaluated and investigated its clinical usefulness.
