PROBLEM TO BE SOLVED: To provide a two-dimensional collimator module which is capable of removing scattered rays in a channel direction and a slice direction, is easy to assemble, and has high positional accuracy.;SOLUTION: The two-dimensional collimator module has a configuration where a first block 13 and a second block 14 support a plurality of first collimator plates 11 arranged in a CH (channel) direction, therebetween in an SL (slice) direction, a plurality of slits 111 are formed on a plate surface of each of the first collimator plates 11 in a radiation direction from an X-ray focus, second collimator plates 12 are inserted per column of slits 111 arranged in the CH direction on the plurality of first collimator plates 11, plate surfaces on one side in the SL direction of the second collimator plates 12 are in contact with wall surfaces on one side in the SL direction of slits 111 in a part of the plurality of the first collimator plates 11, and plate surfaces on the other side in the SL direction of the second collimator plates 12 are in contact with wall surfaces on the other side in the SL direction of slits 111 in the other part of the plurality of first collimator plates 11.;COPYRIGHT: (C)2012,JPO&INPIT
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