In this semiconductor memory device, a potential clamping region having no insulation layer formed therein is provided in an insulation layer. Thereafter, the radiation image information is corrected for sharpness independently in main and auxiliary directions by a sharpness corrector using spatial filters which are selected from a spatial filter memory by a spatial filter selector according to recording or reading conditions. An alternative embodiment further feeds one or more of the first delay element outputs weighted via an output gain to an output summing node which also sums the output of the second delay element and provides a summed output having a multi-dimensional or multi-delay reverberation. The method may further receive the verification from the client device that the converted file can be uploaded, flag the converted file for association with an insurance company event and transmit the converted file to a permanent storage server. The heating cable is connected to the control unit, the control having a mode selector switch for controlling operation of the cable.