JP2004024659A5 - - Google Patents

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JP2004024659A5
JP2004024659A5 JP2002187412A JP2002187412A JP2004024659A5 JP 2004024659 A5 JP2004024659 A5 JP 2004024659A5 JP 2002187412 A JP2002187412 A JP 2002187412A JP 2002187412 A JP2002187412 A JP 2002187412A JP 2004024659 A5 JP2004024659 A5 JP 2004024659A5
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data
air
detection
correction
ray
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JP2002187412A
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JP2004024659A (en
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Priority to JP2002187412A priority Critical patent/JP2004024659A/en
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Claims (3)

被検体の体軸方向に複数の断層像が得られるように複数の検出素子モジュールを設けたマルチスライス型Ｘ線検出器を有するＸ線ＣＴ装置において、
前記マルチスライス型Ｘ線検出器の検出素子モジュールの各検出セルのクロストークによるインパルス応答を算出する第１の算出手段と、前記算出されたインパルス応答からデコンボリューションカーネルを算出する第２の算出手段と、前記算出されたデコンボリューションカーネルによって前記Ｘ線検出器からの被検体を透過した検出データをコンボリューション演算し、そのコンボリューション演算された検出データを用いて前記クロストークを補正する補正手段と、を備えたことを特徴とするＸ線ＣＴ装置。 In an X-ray CT apparatus having a multi-slice X-ray detector provided with a plurality of detection element modules so as to obtain a plurality of tomographic images in the body axis direction of a subject ,
First calculation means for calculating an impulse response due to crosstalk of each detection cell of the detection element module of the multi-slice X-ray detector, and second calculation means for calculating a deconvolution kernel from the calculated impulse response And a correction means for performing a convolution operation on detection data transmitted through the subject from the X-ray detector by the calculated deconvolution kernel, and correcting the crosstalk using the detection data obtained by the convolution operation; , X-rays CT apparatus characterized by comprising a. 前記第１の算出手段は、前記検出素子モジュールの各検出セルとその検出セルに隣接して配置される検出セルとの間に形成される分離層の材質に応じて前記インパルス応答を算出することを特徴とする請求項１に記載のＸ線ＣＴ装置。 The first calculation means calculates the impulse response according to a material of a separation layer formed between each detection cell of the detection element module and a detection cell arranged adjacent to the detection cell. The X-ray CT apparatus according to claim 1. 前記補正手段は、前記第２の演算手段によって算出された前記デコンボリューションカーネルを記憶するデコンボリューションカーネル記憶手段と、前記記憶されたデコンボリューションカーネルによって前記Ｘ線検出器からのエアーデータをコンボリューション演算することで前記クロスークを補正してエアー補正データを算出するエアーデータのクロスーク補正手段と、前記エアーデータのクロスーク補正手段によるエアー補正データを記憶するエアー補正データ記憶手段と、前記エアー補正データにより前記クロストークが補正された検出データをエアー補正するエアー補正手段と、を具備することを特徴とする請求項１又は２の何れか一項に記載のＸ線ＣＴ装置。 The correction means includes a deconvolution kernel storage means for storing the deconvolution kernel calculated by the second calculation means, and a convolution operation for air data from the X-ray detector by the stored deconvolution kernel. The air data cross data correction means for calculating the air correction data by correcting the cross data, the air correction data storage means for storing the air correction data by the air data cross data correction means, and the air correction data The X-ray CT apparatus according to claim 1, further comprising an air correction unit configured to perform air correction on the detection data corrected for crosstalk .
JP2002187412A 2002-06-27 2002-06-27 X-ray ct apparatus Pending JP2004024659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002187412A JP2004024659A (en) 2002-06-27 2002-06-27 X-ray ct apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002187412A JP2004024659A (en) 2002-06-27 2002-06-27 X-ray ct apparatus

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JP2004024659A JP2004024659A (en) 2004-01-29
JP2004024659A5 true JP2004024659A5 (en) 2005-10-13

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JP2002187412A Pending JP2004024659A (en) 2002-06-27 2002-06-27 X-ray ct apparatus

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4727947B2 (en) * 2004-05-21 2011-07-20 株式会社島津製作所 Photodetection circuit
JP4881071B2 (en) 2006-05-30 2012-02-22 株式会社日立製作所 Radiation detector and radiation imaging apparatus equipped with the same
CN104665859B (en) * 2013-11-29 2017-12-15 通用电气公司 Imaging system
CN108242066B (en) * 2016-12-26 2023-04-14 通用电气公司 Device and method for enhancing spatial resolution of CT image and CT imaging system
CN111814562A (en) * 2020-06-11 2020-10-23 浙江大华技术股份有限公司 Vehicle identification method, vehicle identification model training method and related device
CN112991228B (en) * 2021-04-16 2023-02-07 上海联影医疗科技股份有限公司 Method and system for correcting crosstalk

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