Abstract: A SPECT apparatus for forming a radioisotope distribution topographic image of an object, in which a detector such as a fan beam collomator detects fan beam shaped gamma ray emitted from a radioisotope given to the object to provide fan beam data, while a scanner causes relative rotation between the object and the detecter, and a data collector collects the fan beam data, and in which a data converter successively converts the fan beam data into parallel beam data during the relative rotation, and a reconstructor reconstructs a tomographic image from the parallel beam data. The fan beam data having a first matrix size and a first angle may be converted into the parallel beam data having a second matrix size and a second angle which are different from the first matrix size and the first angle, respectively.

Abstract: A method of managing information used and generated in the scheduling and exhibition of performances is disclosed. A video network includes a video server that operates several video recorders to simultaneously exhibit video performances or programs on a plurality of channels. The video server is controlled in real time in accordance with data presented to it in an exhibition plan. The exhibition plan is generated through the performance of an exhibition manager process which operates on a computer. The exhibition manager manages information related to the performances to be exhibited, schedules the performances in accordance with user-supplied timing data, prints reports, and maintains a personal information manager having a database describing studios, contacts, and other information related to licensing the performances for exhibition on the network. The information related to performances includes repeat factors and short titles which the exhibition manager calculates.