An image collating apparatus and an image collating method, in which a document larger than an image reader can be collated using a preregistered image even in the case where the document is read by the image reader, are disclosed. 5-fold greater than the half-life of elimination from the lung of the drug, wherein the half-life of elimination from the lung is measured by bronchoalveolar lavage followed by assaying residual lung material. The baffle plate has a speaker mount hole at the center. The defect density of the single crystalline GaN based semiconductor layer film grown on the epitaxial-substrate is greatly reduced.