초록 ▼

A radiation detector of this invention includes a scintillator for converting an X-ray incident from a surface side into light, at least one photodiode chip having a plurality of photodiodes for converting the converted light into electrical signals, at least one switching chip having a plurality of

A radiation detector of this invention includes a scintillator for converting an X-ray incident from a surface side into light, at least one photodiode chip having a plurality of photodiodes for converting the converted light into electrical signals, at least one switching chip having a plurality of switching elements for reading out a plurality of signals from the plurality of photodiodes, and at least one data acquisition chip having a plurality of data acquisition systems for amplifying the plurality of readout signals and converting the signals into digital signals. The photodiode chip, the switching chip, and the data acquisition chip are commonly mounted on a rigid multilayer wiring board.

대표청구항 ▼

1. A radiation detector comprising a first detection element array group including a plurality of first detection element rows along a slice direction, each first detection element row having a plurality of first detection elements along a channel direction, each first detection element having a

1. A radiation detector comprising a first detection element array group including a plurality of first detection element rows along a slice direction, each first detection element row having a plurality of first detection elements along a channel direction, each first detection element having a first width along the slice direction; and a second detection element array group including a plurality of second detection element rows along the slice direction, each second detection element row having a plurality of second detection elements along the channel direction, each second detection element having a second width larger than the first width along the slice direction, the second detection element rows being arranged at both sides of the first detection element rows along the slice direction, the number of the second detection element rows in the slice direction of each side being smaller than the number of first detection element rows. 2. A detector according to claim 1, wherein the total number of the second detection element rows at both sides is larger than the number of the first detection element rows. 3. An X-ray CT apparatus comprising: an X-ray source configured to generate X-rays; a radiation detector; a data acquisition system configured to acquire transmission data associated with an object to be examined by using an output from said radiation detector; a reconstructing unit configured to reconstruct image data on the basis of the transmission data from said data acquisition means; and a display unit configured to display the image data, wherein said radiation detector comprises: a first detection element array group including a plurality of first detection element rows along a slice direction, each first detection element row having a plurality of first detection elements along a channel direction, each first detection element having a first width along the slice direction; and a second detection element array group including a plurality of second detection element rows along the slice direction, each second detection element row having a plurality of second detection elements along the channel direction, each second detection element having a second width larger than the first width along the slice direction, the second detection element rows being arranged at both sides of the first detection element rows along the slice direction, the number of the second detection element rows in the slice direction of each side being smaller than the number of first detection element rows. 4. An apparatus according to claim 3, wherein said reconstructing unit reconstructs the image data made of isotropic voxel data. 5. An apparatus according to claim 4, further comprising a moving unit configured to move said X-ray source or the object to make said X-ray source lay down a helical trajectory around the object, wherein said reconstructing unit reconstructs the image data made of the isotropic voxel data on the basis of a scanning condition including at least one of a field of view, a detection element row used for the data acquisition, a helical pitch, a scanning range, a scanning time, and a current supplied to said x-ray source.