Direct conversion energy discriminating CT detector
First Claim
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1. A direct conversion CT detector comprising:
- multiple direct conversion layers designed to directly convert radiographic energy to electrical signals representative of energy sensitive CT data; and
an electrical signal collection layer sandwiched between adjacent direct conversion layers.
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Abstract
A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation.
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Citations
21 Claims
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1. A direct conversion CT detector comprising:
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multiple direct conversion layers designed to directly convert radiographic energy to electrical signals representative of energy sensitive CT data; and an electrical signal collection layer sandwiched between adjacent direct conversion layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A CT system comprising:
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a rotatable gantry having a bore centrally disposed therein; a table movable fore and aft through the bore and configured to position a subject for CT data acquisition; a radiographic energy projection source positioned within the rotatable gantry and configured to project radiographic energy toward the subject; and a detector array disposed within the rotatable gantry and configured to detect radiographic energy projected by the projection source and impinged by the subject, the detector array including a plurality of detector cells, each cell comprising stacked arrangement of semiconductor layers in a direction generally that of energy projection and designed to provide energy sensitive data acquired from the subject in response to receiving radiographic energy, wherein the stacked arrangement includes an electrode film sandwiched between adjacent semiconductor layers. - View Dependent Claims (15, 16, 17, 18)
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19. A CT detector comprising:
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a first means and a second means for directly converting radiographic energy to electrical signals; and means for receiving electrical signals interstitially positioned between the first means for directly converting and the second means for directly converting. - View Dependent Claims (20, 21)
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Specification