Patent Number: 
Section: abstract

In an X-ray detection device having an X-ray detection element array of photo diodes for multi channels arranged with a predetermined pitch on a substrate, a plurality of scintillators adhered onto respective photo diodes, and isolation walls disposed between neighboring scintillators for respective channels an isolation band for isolating the respective channels is provided between respective light receiving portions of the photo diode array for the multi channels, and the surface of the isolation band is covered by a material having light absorbing property, and the width of the region which is covered by the material having light absorbing property is equal to a region occupied by the width of the isolation wall provided between neighboring scintillators for the respective channels. Thereby, light leakage between the neighboring elements in a multi element X-ray detection device of scintillators and a silicon photo diode array is prevented to provide an X-ray detection device suitable for a multi slice type X-ray CT apparatus, in which the S/N ratio and spatial resolution of the device are enhanced by effectively guiding the light induced in the scintillators into the silicon photo diode array. An X-ray CT apparatus using such X-ray detection device can be provided.