[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS6464630A - Electrocardiographic synchronous type x-ray ct apparatus - Google Patents

Electrocardiographic synchronous type x-ray ct apparatus

Info

Publication number
JPS6464630A
JPS6464630A JP62221921A JP22192187A JPS6464630A JP S6464630 A JPS6464630 A JP S6464630A JP 62221921 A JP62221921 A JP 62221921A JP 22192187 A JP22192187 A JP 22192187A JP S6464630 A JPS6464630 A JP S6464630A
Authority
JP
Japan
Prior art keywords
projection data
shift
image
artifact
ray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62221921A
Other languages
Japanese (ja)
Inventor
Masashi Hosoki
Kazuhiro Sato
Kiyoshi Shishikura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Healthcare Manufacturing Ltd
Original Assignee
Hitachi Medical Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Medical Corp filed Critical Hitachi Medical Corp
Priority to JP62221921A priority Critical patent/JPS6464630A/en
Publication of JPS6464630A publication Critical patent/JPS6464630A/en
Pending legal-status Critical Current

Links

Landscapes

  • Apparatus For Radiation Diagnosis (AREA)

Abstract

PURPOSE:To reduce the artifact due to the shift of the respiration stop position of an image, by confirming the range of projection data marked in the shift of the respiration stop position of an object to be examined and reconstituting the data performing smoothing processing to the projection data of said range as an image. CONSTITUTION:The shift of positional relation is generated in different scanning projection data obtained at the same X-ray irradiation position by the shift of a respiration stop position. When projection data of a specific phase are collected from projection data due to plural scannings in an editing circuit 12, projection data accompanied by the shift of positional relation is mixed in said data. When this projection data is reconstituted, an artifact is generated in an X-ray CT image to deteriorate image quality. When projection data are subjected to smoothing processing with respect to the total angle by a smoothing processing circuit 13, the artifact is reduced in the cardiac part of a region to be diagnosed with respect to the reconstituted X-ray CT image while the lowering of resolving power is suppressed and the artifact from the rib part caused by the shift of the respiration stop position can be reduced to a large extent.
JP62221921A 1987-09-07 1987-09-07 Electrocardiographic synchronous type x-ray ct apparatus Pending JPS6464630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62221921A JPS6464630A (en) 1987-09-07 1987-09-07 Electrocardiographic synchronous type x-ray ct apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62221921A JPS6464630A (en) 1987-09-07 1987-09-07 Electrocardiographic synchronous type x-ray ct apparatus

Publications (1)

Publication Number Publication Date
JPS6464630A true JPS6464630A (en) 1989-03-10

Family

ID=16774244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62221921A Pending JPS6464630A (en) 1987-09-07 1987-09-07 Electrocardiographic synchronous type x-ray ct apparatus

Country Status (1)

Country Link
JP (1) JPS6464630A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282518A (en) * 1990-02-14 1994-02-01 Nissan Motor Co., Ltd. Vehicular four wheel drive train
US5610681A (en) * 1992-10-31 1997-03-11 Canon Kabushiki Kaisha Optical eye-control apparatus
WO2013054737A1 (en) * 2011-10-12 2013-04-18 株式会社 東芝 X-ray ct device and image processing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282518A (en) * 1990-02-14 1994-02-01 Nissan Motor Co., Ltd. Vehicular four wheel drive train
US5610681A (en) * 1992-10-31 1997-03-11 Canon Kabushiki Kaisha Optical eye-control apparatus
WO2013054737A1 (en) * 2011-10-12 2013-04-18 株式会社 東芝 X-ray ct device and image processing device
JP2013081716A (en) * 2011-10-12 2013-05-09 Toshiba Corp X-ray ct device and image processing device
US9008262B2 (en) 2011-10-12 2015-04-14 Kabushiki Kaisha Toshiba X-ray CT apparatus and image processing apparatus

Similar Documents

Publication Publication Date Title
Crawford et al. Computed tomography scanning with simultaneous patient translation
EP1324699B1 (en) Cardiac helical half scan reconstructions for multiple detector row ct
US6023494A (en) Methods and apparatus for modifying slice thickness during a helical scan
US6246742B1 (en) Local CT image reconstruction with limited x-ray exposure
US7515678B2 (en) Method and system for performing CT image reconstruction with motion artifact correction
US6421552B1 (en) Methods and apparatus for estimating cardiac motion using projection data
DE69126243T2 (en) Computer tomograph with scanning device
Hsieh A general approach to the reconstruction of x‐ray helical computed tomography
US6269501B1 (en) Methods and apparatus for automatic patient positioning
Zhang et al. Respiratory average CT for attenuation correction in myocardial perfusion SPECT/CT
US7532702B2 (en) Method and system for performing CT image reconstruction with motion artifact correction
JP2004202246A (en) High pitch cardiac helical scan using extension restructuring window
CN107798711A (en) A kind of medical image scan method and system
JPS6464630A (en) Electrocardiographic synchronous type x-ray ct apparatus
CN203089157U (en) X-ray collimator for small region of interest in computed tomography system
ATE144115T1 (en) METHOD AND DEVICE FOR COMPUTERIZED TOMOGRAPHY AND PANORAMA SCANING
US20050078791A1 (en) Methods and systems for smoothing
JPH026530B2 (en)
CN104545964A (en) Image correcting method and system
JP4509497B2 (en) X-ray CT system and control method thereof
JP2605048Y2 (en) Helical scan type X-ray CT system
JP2002011001A (en) X-ray computed tomography
JPH0471540A (en) X-ray ct device
JPH045143Y2 (en)
JPS63189131A (en) Electrocardiograph synchronous type x-ray ct apparatus