An installation for the medical examination andor treatment of a patient has a number of different examination andor treatment devices of different types. Particularly, a method of synthesizing polysilazane using a solution which undergoes phase separation and a method of preparing a polysilazane solution for a wafer are disclosed. A range correcting section corrects pixel density indicated by the image data on all the image data read out from the page memory by using the set of correction reference values. The first fastening elements are releasably mateable with the second fastening elements to define a releasable fastening system. Thereby, the method of manufacturing the SOI wafer that is small in SOI layer film thickness range, is small in surface roughness of the SOI layer surface, is smooth in shape of a terrace part and has no defects such as voids, blisters and so forth in the SOI layer can be provided. Responsive to the entry of the request, a fact repository containing information derived from unstructured documents is accessed.