Patent Number: 
Section: claims

1. A data detection system for an X-ray CT apparatus comprising:a data acquisition circuit, including at least one row of X-ray detection elements arrayed in a channel direction, and configured to acquire data required for generating X-ray CT image data corresponding to the at least one row of the X-ray detection elements; anda connection structure configured to connect said data acquisition circuit with another adjacent data acquisition circuit directly or indirectly in a row direction, the X-ray detection elements installed in said data acquisition circuit shifting from X-ray detection elements installed in the another adjacent data acquisition circuit in the channel direction; andan adjustment structure configured to adjust a shift amount in the channel direction between said data acquisition circuit and the another adjacent data acquisition circuit. 2. The data detection system for the X-ray CT apparatus of claim 1,wherein said data acquisition circuit includes a platy circuit board whose thickness direction is different from a rotation direction of said data acquisition circuit. 3. The data detection system for the X-ray CT apparatus of claim 1,wherein said data acquisition circuit has X-ray detection elements, each having photodiodes arranged in an incident direction of an X-ray. 4. The data detection system for the X-ray CT apparatus of claim 1,wherein said data acquisition circuit includes a platy circuit board,a photodiode installed in each of the X-ray detection elements is on the platy circuit board, anda boundary face between the photodiode and the platy circuit board being perpendicular to the row direction. 5. The data detection system for the X-ray CT apparatus of claim 1,wherein said data acquisition circuit includes plural X-ray detection elements in the row direction. 6. A data detection system for the X-ray CT apparatus of claim 1, including:said data acquisition circuit; andthe another adjacent data acquisition circuit connected with said data acquisition circuit in the row direction by said connection structure. 7. An X-ray CT apparatus comprising:said data detection system of claim 1;an X-ray tube configured to expose an X-ray to an object; anda data processing circuit configured to generate the X-ray CT image data based on projection data of the object acquired by said data detection system.