# US 9,753,154 B2 · X-ray detector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,753,154 B2 - Document ID: US9753154B2 - Status: Granted - Kind: B2 - Application number: 14/458,411 - Filed: 2014-08-13 - Published: 2015-03-05 - Granted: 2017-09-05 - Earliest claimed: 2013-09-03 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: Peter Hackenschmied; Christian Schröter; Matthias Strassburg - Web page: https://patentgrep.com/patent/US9753154B2 ## CPC - G01T 1/208: Circuits specially adapted for scintillation detectors, e.g. for the photo-multiplier section - G01T 1/2002: {Optical details, e.g. reflecting or diffusing layers} - G01T 1/20186: {Position of the photodiode with respect to the incoming radiation, e.g. in the front of, below or sideways the scintillator} - G01T 1/247: {Detector read-out circuitry (for processing gain or off-set correction H04N)} - G01T 1/2928: {using solid state detectors} - G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00) ## Abstract An X-ray detector is disclosed, in particular for a computed tomography system. In an embodiment, the X-ray detector includes a regular arrangement of measuring pixels for covering a measuring surface. A plurality of the measuring pixels of the regular arrangement are constructed as direct converting measuring pixels, and remaining ones of the measuring pixels are constructed as indirect converting measuring pixels. ## Claims ### Claim 1 An X-ray detector, comprising: a regular arrangement of measuring pixels covering a measuring surface, the regular arrangement including two different types of measuring pixels, wherein a plurality of the measuring pixels of the regular arrangement are constructed as direct converting measuring pixels and remaining ones of the measuring pixels are constructed as indirect converting measuring pixels, and wherein at least two adjacent of rows of measuring pixels are direct converting measuring pixels, a row being a plurality of measuring pixels adjacent to one another and extending along the entire measuring surface in a direction of rotation of the x-ray detector, wherein each direct converting measuring pixel includes a detector layer, and wherein the detector layer is provided with a reflective surface at least at boundary surfaces between direct converting measuring pixels and indirect converting measuring pixels. ### Claim 2 (depends on 1) The X-ray detector of claim 1, wherein the direct converting measuring pixels and the indirect converting measuring pixels are arranged in a periodic sequence. ### Claim 3 (depends on 2) The X-ray detector of claim 2, wherein a plurality of measuring pixels are mounted side by side in a row direction to form a measuring pixel row, wherein only measuring pixels of a same type are mounted side by side in each measuring pixel row, and wherein a plurality of measuring pixel rows are mounted side by side in a column direction, orthogonal to the row direction, to form the regular arrangement of measuring pixels. ### Claim 4 (depends on 3) The X-ray detector of claim 3, wherein, viewed in the column direction, measuring pixel rows with direct converting measuring pixels and measuring pixel rows with indirect converting measuring pixels are arranged in a periodic sequence, and wherein each measuring pixel row with measuring pixels of a first type respectively follows a number of measuring pixel rows. ### Claim 5 (depends on 3) The X-ray detector of claim 3, wherein, viewed in the column direction, measuring pixel rows with direct converting measuring pixels and measuring pixel rows with indirect converting measuring pixels are arranged in a periodic sequence, and wherein, following a number of measuring pixel rows with measuring pixels of a first type, is a same number of measuring pixel rows with measuring pixels of a second type. ### Claim 6 (depends on 3) The X-ray detector of claim 3, wherein measuring pixel rows with direct converting measuring pixels and measuring pixel rows with indirect converting measuring pixels are mounted side by side so as to alternate in the column direction. ### Claim 7 (depends on 2) The X-ray detector of claim 2, wherein each measuring pixel includes a detector layer and a signal processing layer with an application-specific integrated circuit. ### Claim 8 (depends on 2) The X-ray detector of claim 2, wherein each indirect converting measuring pixel includes a scintillator layer with walls for segregation from adjacent measuring pixels, and wherein the walls are omitted at boundary surfaces between indirect converting measuring pixels and direct converting measuring pixels. ### Claim 9 (depends on 2) The X-ray detector of claim 2, further comprising an evaluation unit, the evaluation unit being configured to evaluate the measuring signals of all direct converting measuring pixels and the measuring signals of all indirect converting measuring pixels independently of each other, wherein two independent pixel type-based data records are generated, and wherein the two data records are then used for an image reconstruction. ### Claim 10 (depends on 1) The X-ray detector of claim 1, wherein a plurality of measuring pixels are mounted side by side in a row direction to form a measuring pixel row, wherein only measuring pixels of a same type are mounted side by side in each measuring pixel row, and wherein a plurality of measuring pixel rows are mounted side by side in a column direction, orthogonal to the row direction, to form the regular arrangement of measuring pixels. ### Claim 11 (depends on 10) The X-ray detector of claim 10, wherein, viewed in the column direction, measuring pixel rows with direct converting measuring pixels and measuring pixel rows with indirect converting measuring pixels are arranged in a periodic sequence, and wherein each measuring pixel row with measuring pixels of a first type respectively follows a number of measuring pixel rows. ### Claim 12 (depends on 11) The X-ray detector of claim 11, wherein the number of direct converting measuring pixel rows is three measuring pixel rows. ### Claim 13 (depends on 10) The X-ray detector of claim 10, wherein, viewed in the column direction, measuring pixel rows with direct converting measuring pixels and measuring pixel rows with indirect converting measuring pixels are arranged in a periodic sequence, and wherein, following a number of measuring pixel rows with measuring pixels of a first type, is a same number of measuring pixel rows with measuring pixels of a second type. ### Claim 14 (depends on 10) The X-ray detector of claim 10, wherein measuring pixel rows with direct converting measuring pixels and measuring pixel rows with indirect converting measuring pixels are mounted side by side so as to alternate in the column direction. ### Claim 15 (depends on 1) The X-ray detector of claim 1, wherein the direct converting measuring pixels and the indirect converting measuring pixels have the same dimensions in row direction. ### Claim 16 (depends on 1) The X-ray detector of claim 1, wherein each measuring pixel includes a detector layer and a signal processing layer with an application-specific integrated circuit. ### Claim 17 (depends on 1) The X-ray detector of claim 1, wherein each indirect converting measuring pixel includes a scintillator layer with walls for segregation from adjacent measuring pixels, and wherein the walls are omitted at boundary surfaces between indirect converting measuring pixels and direct converting measuring pixels. ### Claim 18 (depends on 1) The X-ray detector of claim 1, wherein the reflective surface is achieved with aid of a silicide. ### Claim 19 (depends on 1) The X-ray detector of claim 1, further comprising an evaluation unit, the evaluation unit being configured to evaluate the measuring signals of all direct converting measuring pixels and the measuring signals of all indirect converting measuring pixels independently of each other, wherein two independent pixel type-based data records are generated, and wherein the two data records are then used for an image reconstruction. ### Claim 20 (depends on 1) The X-ray detector of claim 1, wherein the X-ray detector is included in a computed tomography system. ### Claim 21 (depends on 1) A computed tomography system, comprising the X-ray detector of claim 1. ### Claim 22 (depends on 1) The X-ray detector of claim 1, wherein half of the measuring surface is covered by adjacent measuring pixels of a first type and half of the measuring surface is covered by adjacent measuring pixels of a second type. ### Claim 23 (depends on 1) The X-ray detector of claim 1, wherein the direct converting measuring pixels comprising a row of measuring pixels abut one another and the indirect converting measuring pixels comprising a row of measuring pixels abut one another.