WO2013192446A3 - Computed tomography radiation dose reduction - Google Patents

Computed tomography radiation dose reduction Download PDF

Info

Publication number
WO2013192446A3
WO2013192446A3 PCT/US2013/046879 US2013046879W WO2013192446A3 WO 2013192446 A3 WO2013192446 A3 WO 2013192446A3 US 2013046879 W US2013046879 W US 2013046879W WO 2013192446 A3 WO2013192446 A3 WO 2013192446A3
Authority
WO
WIPO (PCT)
Prior art keywords
computed tomography
leaves
radiation dose
attenuation
contrast
Prior art date
Application number
PCT/US2013/046879
Other languages
French (fr)
Other versions
WO2013192446A2 (en
Inventor
Frederic Noo
Dominic Heuscher
Original Assignee
University Of Utah Research Foundation
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
Priority claimed from US13/531,471 external-priority patent/US9332946B2/en
Priority claimed from US13/531,475 external-priority patent/US9198626B2/en
Priority claimed from US13/531,468 external-priority patent/US9259191B2/en
Priority claimed from US13/531,472 external-priority patent/US9125572B2/en
Application filed by University Of Utah Research Foundation filed Critical University Of Utah Research Foundation
Publication of WO2013192446A2 publication Critical patent/WO2013192446A2/en
Publication of WO2013192446A3 publication Critical patent/WO2013192446A3/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • A61B6/035—Mechanical aspects of CT
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/06—Diaphragms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/507—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for determination of haemodynamic parameters, e.g. perfusion CT
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Surgery (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Public Health (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Pulmonology (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

A collimator for a computed tomography imaging device can include leaves positioned on and bounding opposing sides of a primary radiation delivery window. The leaves can include first and second gratings. The leaves can be movable to adjust at least one of a size or a location of the primary radiation delivery window relative to the radiation source in a direction non-parallel to an axis of rotation of the radiation source. A method of contrast-enhanced computed tomography (CT) imaging can include repeatedly scanning a target region. The frequency of scans can be increased after detecting an increase of the attenuation of radiation by a contrast-enhanced first structure within a target region. After detecting a subsequent decrease in the attenuation, the frequency can be decreased. An applied power can be a first power for a first scan and then adjusted for subsequent scans based on an algorithm.
PCT/US2013/046879 2012-06-22 2013-06-20 Computed tomography radiation dose reduction WO2013192446A2 (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
US13/531,471 2012-06-22
US13/531,468 2012-06-22
US13/531,471 US9332946B2 (en) 2012-06-22 2012-06-22 Adaptive control of sampling frequency for computed tomography
US13/531,475 US9198626B2 (en) 2012-06-22 2012-06-22 Dynamic power control of computed tomography radiation source
US13/531,468 US9259191B2 (en) 2012-06-22 2012-06-22 Dynamic collimation for computed tomography
US13/531,472 2012-06-22
US13/531,472 US9125572B2 (en) 2012-06-22 2012-06-22 Grated collimation system for computed tomography
US13/531,475 2012-06-22

Publications (2)

Publication Number Publication Date
WO2013192446A2 WO2013192446A2 (en) 2013-12-27
WO2013192446A3 true WO2013192446A3 (en) 2014-03-13

Family

ID=49769707

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/046879 WO2013192446A2 (en) 2012-06-22 2013-06-20 Computed tomography radiation dose reduction

Country Status (1)

Country Link
WO (1) WO2013192446A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11009471B2 (en) * 2018-09-12 2021-05-18 Illinois Tool Works Inc. Dynamic radiation collimation for non destructive analysis of test objects
CN110275471B (en) * 2019-07-17 2020-12-04 郑州信大先进技术研究院 Desktop type industrial CT motion control system based on NI motion control card
CN113288198A (en) * 2021-06-02 2021-08-24 上海博恩登特科技有限公司 Fast low-dose oral CBCT imaging method and system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010005409A1 (en) * 1999-12-27 2001-06-28 Makoto Gohno Multi-slice X-ray CT apparatus and method of controlling the same
US6445761B1 (en) * 1997-03-12 2002-09-03 Hitachi Medical Corporation X-ray computerized tomograph including collimator that restricts irradiation range of X-ray fan beam
US20060067481A1 (en) * 2002-07-20 2006-03-30 The University Of Surrey Radiation collimation
US20100054395A1 (en) * 2008-09-04 2010-03-04 Yasuhiro Noshi X-ray computer tomography apparatus
WO2012032435A1 (en) * 2010-09-06 2012-03-15 Koninklijke Philips Electronics N.V. X-ray imaging with pixelated detector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6445761B1 (en) * 1997-03-12 2002-09-03 Hitachi Medical Corporation X-ray computerized tomograph including collimator that restricts irradiation range of X-ray fan beam
US20010005409A1 (en) * 1999-12-27 2001-06-28 Makoto Gohno Multi-slice X-ray CT apparatus and method of controlling the same
US20060067481A1 (en) * 2002-07-20 2006-03-30 The University Of Surrey Radiation collimation
US20100054395A1 (en) * 2008-09-04 2010-03-04 Yasuhiro Noshi X-ray computer tomography apparatus
WO2012032435A1 (en) * 2010-09-06 2012-03-15 Koninklijke Philips Electronics N.V. X-ray imaging with pixelated detector

Also Published As

Publication number Publication date
WO2013192446A2 (en) 2013-12-27

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