公开(公告)号：US20190000409A1

公开(公告)日：2019-01-03

申请号：US16021951

申请日：2018-06-28

Applicant: Canon Medical Systems Corporation

Inventor： Emi TAMURA ,  Hiroaki MIYAZAKI ,  Hiroaki NAKAI ,  Toshiyuki ONO

IPC: A61B6/00 ,  A61B6/03

Abstract: An X-ray CT apparatus according to one embodiment includes a photon counting detector and a processing circuitry. The photon counting detector includes a plurality of detecting elements configured to detect X-rays. The processing circuitry is configured to set a control parameter corresponding to a position of each of the detecting elements in the photon counting detector.

公开(公告)号：US20180300909A1

公开(公告)日：2018-10-18

申请号：US15951693

申请日：2018-04-12

Applicant: Canon Medical Systems Corporation

Inventor： Emi TAMURA ,  Hiroaki NAKAI

IPC: G06T11/00 ,  G01T1/29 ,  A61B6/00 ,  A61B6/03 ,  G06T5/50 ,  G06T7/00

CPC classification number: G06T11/008 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/5205 ,  G01T1/2985 ,  G06T5/50 ,  G06T7/0012 ,  G06T2207/10081 ,  G06T2207/30004

Abstract: An X-ray CT apparatus according to an embodiment includes a photon counting detector, and processing circuitry. The photon counting detector includes a plurality of detecting elements each of which outputs signals corresponding to numbers of photons that are counted. The processing circuitry generates pieces of first projection data on a basis of the signals from the plurality of detecting elements. The processing circuitry generate second projection data by bundling together, in spatial units, pieces of first projection data from a predetermined number of detecting elements among the plurality of detecting elements. The processing circuitry reconstructs a material decomposition image on a basis of the second projection data.

公开(公告)号：US20180211417A1

公开(公告)日：2018-07-26

申请号：US15877840

申请日：2018-01-23

Applicant: Canon Medical Systems Corporation

Inventor： Hiroaki MIYAZAKI ,  Hiroaki NAKAI ,  Naoki SUGIHARA ,  Tooru KATO ,  Mikihito HAYASHI ,  Emi TAMURA

IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00 ,  G01N23/046 ,  G06T7/11 ,  G06T7/136

CPC classification number: G06T11/005 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/461 ,  A61B6/5205 ,  G01N23/046 ,  G01N2223/401 ,  G01N2223/419 ,  G06T7/11 ,  G06T7/136 ,  G06T11/006 ,  G06T2207/10081

Abstract: An X-ray CT apparatus according to an embodiment includes an X-ray tube, a photon counting detector, and a processing circuitry. The X-ray tube is configured to generate X-rays. The photon counting detector includes a plurality of detecting elements each configured to output a signal in response to any of the X-rays becoming incident thereto after having passed through an examined subject. The processing circuitry is configured to determine, within a reconstruction region, a first region on which a spectrum reconstructing process is to be performed and a second region on which an energy integral reconstructing process is to be performed, on the basis of output values related to energy spectra based on the signals output by the detecting elements. The processing circuitry is configured to generate an image on the basis of the determined first region and the determined second region.