We have tested an autoradiographic photostimulable phosphor image storage plate as a medium for recording spectra in the wavelength region from 50 to 550 A and have compared the results with spectra obtained with conventional photographic emulsions. The image plate shows sensitivity comparable with the photographic plates but has a linear intensity response over a much wider dynamic range. Resolution of current image-plate systems is limited by the scanner that reads the stored image from the phosphor plate, but this limitation is not fundamental. These initial results suggest that optimized image plates with an improved scanner would provide a favorable alternative to photographic plates in this spectral region.