A phase retrieval method for differential phase contrast imaging includes receiving data corresponding to a differential phase image generated from a measured signal. The method comprises the steps of inserting a coil into an auxiliary spacing apparatus, inserting the auxiliary spacing apparatus into a mold, and forming a resin molding for the auxiliary spacing apparatus with the coil by putting a resin into the mold. The assignment includes identifying a database that contains priority assignment rules for demand records and then querying the rule database to find the database record that corresponds to the particular demand record. Normal operation of the aerosol container allows removal of over 90% of the composition from the aerosol container. Current corresponding to the control data of the second data holding means is supplied to LEDs 40-1-40-M. The institute user might be interested to use the apparatus to recruit employees to fill job openings.