EP3217408A2 - Module de focalisation pour un filtre de forme et filtre de forme destiné à régler une distribution de l'intensité spatiale d'un rayon x - Google Patents

Module de focalisation pour un filtre de forme et filtre de forme destiné à régler une distribution de l'intensité spatiale d'un rayon x Download PDF

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Publication number
EP3217408A2
EP3217408A2 EP17173761.2A EP17173761A EP3217408A2 EP 3217408 A2 EP3217408 A2 EP 3217408A2 EP 17173761 A EP17173761 A EP 17173761A EP 3217408 A2 EP3217408 A2 EP 3217408A2
Authority
EP
European Patent Office
Prior art keywords
groove
frame
pairs
opening
guide rail
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.)
Granted
Application number
EP17173761.2A
Other languages
German (de)
English (en)
Other versions
EP3217408B1 (fr
EP3217408A3 (fr
Inventor
Sascha Manuel Huck
Karl Stierstorfer
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.)
Siemens Healthcare GmbH
Original Assignee
Siemens Healthcare GmbH
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 Siemens Healthcare GmbH filed Critical Siemens Healthcare GmbH
Priority to EP17173761.2A priority Critical patent/EP3217408B1/fr
Publication of EP3217408A2 publication Critical patent/EP3217408A2/fr
Publication of EP3217408A3 publication Critical patent/EP3217408A3/fr
Application granted granted Critical
Publication of EP3217408B1 publication Critical patent/EP3217408B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—HANDLING OF 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
    • G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—HANDLING OF 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
    • G21K1/10—Scattering devices; Absorbing devices; Ionising radiation filters

Definitions

  • the invention relates to a focusing module for a shape filter for adjusting a spatial intensity distribution of an X-ray beam.
  • the invention further relates to a shape filter for adjusting a spatial intensity distribution of an X-ray, an irradiation arrangement and a medical imaging device.
  • the spatial intensity distribution of the X-ray beam for example, as a function of physiological and / or anatomical parameters of the patient.
  • a radiation incident on the patient head-on covers a significantly shorter distance through the patient and, consequently, a significantly lower absorption than radiation incident on the side of the patient for example propagated from one shoulder to the opposite shoulder.
  • US 7403597 B2 discloses an aperture device for an X-ray device provided for scanning an object.
  • US 8873704 B2 discloses a filter for an X-ray device for forming an intensity profile of X-ray radiation emanating from an X-ray source.
  • the focus line may in particular be a straight line and / or have the focal point.
  • the frame may comprise a first crossbar forming a first long side of the through opening.
  • the frame may have a second crossbar forming a second long side of the through opening.
  • the frame may have a first side part, which forms a first short side of the through-opening.
  • the frame may have a second side part, which forms a second short side of the through opening.
  • the first crossbar and / or the second crossbar may be made of aluminum, for example.
  • a crossbar may be a single component or a composite assembly having multiple components.
  • a side part may be, for example, a single component or a composite assembly having a plurality of components.
  • a first stop means may be formed, wherein the lamella plate along the first groove is insertable until a positive connection of the lamella plate with the first stop means, wherein the positive connection of the lamination plate with the first stop means further insertion of the lamination plate along the counteracts first groove.
  • the first stop means may be formed based on an additive manufacturing process and / or an abrasive manufacturing process or connected to the frame, for example, glued be.
  • the first stop means may be formed for example in the form of a stop rail.
  • a second stop means may be formed, wherein the lamella plate along the second groove is insertable up to a positive connection of the lamellar plate with the second stop means, wherein the positive connection of the lamination plate with the second stop means further insertion of the lamination plate along the counteracts second groove.
  • the second stop means may be formed based on an additive manufacturing process and / or an abrasive manufacturing process or connected to the frame, for example glued.
  • the second stop means can, for example be formed in the form of a rail which extends along the frame.
  • the focusing module may further comprise a first guide rail and a second guide rail.
  • the respective first grooves of the groove pairs may be formed in the first guide rail.
  • the respective second grooves of the groove pairs may be formed in the second guide rail.
  • the first guide rail and / or the second guide rail can be produced, for example, in the form of a strip made of a dimensionally stable and radiation-resistant material, in particular plastic.
  • this strip grooves can be formed by structuring.
  • Crystalline semiconductors such as, for example, silicon, ceramic carbon fiber reinforced carbon, carbon fiber reinforced plastic or combinations thereof are particularly suitable as a dimensionally stable and radiation resistant material.
  • first guide rail and / or the second guide rail may be made of a crystalline semiconductor material.
  • the groove pairs may be formed based on an additive manufacturing process and / or an abrasive manufacturing process.
  • the first groove and / or the second groove may be fabricated using an additive process such as 3D printing and / or using a removing process such as wire eroding or etching.
  • the arrangement of groove pairs has a plurality of groove pairs.
  • the focusing module can have a plurality of arrangements of groove pairs, with each arrangement of groove pairs each having a focal point and / or a focus line being assignable.
  • a first arrangement which is formed by groove pairs, which are arranged in the center of the focusing module, a first focus line is assigned and that a second arrangement, which is formed by groove pairs, which are arranged outside the center of the focusing module, a second focus line is assigned.
  • the second focus line may be closer to the focusing module than the first focus line or vice versa.
  • the invention further relates to a shape filter for adjusting a spatial intensity distribution of an X-ray beam, comprising a focussing module according to the invention and a plurality of lamination plates which are each received in a groove pair of the arrangement of groove pairs and inserted into the through hole.
  • the arrangement of the laminations so the width, length and height of the laminations and the distance and the angle between adjacent laminations, can be freely selected in many areas. This allows, for example, different shaft ratios for the tunnel-shaped opening or different line frequencies, also along the same guide rail realize.
  • the lamination plates may be made of tungsten and / or of a tungsten alloy. With tungsten, a high absorption of X-rays can be realized. As a result, in particular scattered radiation and spectral beam hardening of the X-ray beam can be minimized.
  • the lamellar sheets can be precisely and permanently aligned in the guide rails to the focal point and / or the focus line.
  • the laminations can be fixed against wobbling and slipping out in the groove pairs.
  • the fixing of the laminations in the first groove and / or in the second groove can be made for example by an adhesive or with the aid of stop rails.
  • a computed tomography device is exemplified for a medical imaging device.
  • the groove pairs NP are arranged side by side along the through hole H so as to be in different planes E each having the focal point T and intersecting in the focus line TL.
  • the groove pairs NP each have a first groove N1 and a second groove N2 opposite to the first groove N1 with respect to the through hole H.
  • the first groove N1 and the second groove N2 are formed such that a lamination sheet L is receivable at two opposite edges of the lamination sheet L in the first groove N1 and the second groove N2 and along the first groove N1 and the second groove N2 in the continuous one Opening H is insertable.
  • the first groove N1 is open only from the front end side of the guide rail RN1, so that lamination sheets L can be used from this direction but can not slip out on the back.
  • the tolerances in particular for the width YN and depth ZN, for example, be about 10 microns.
  • the distance from the focal point T to the first groove N1 and / or to the second groove N2 may be approximately 220 millimeters, for example.
  • the acquisition region 4 is located in the tunnel-shaped opening 9.
  • a region of the patient 13 to be imaged can be positioned so that the radiation 27 can reach the region to be imaged from the radiation source 26 and, after interacting with the region to be imaged, to the radiation detector 28 can get.
  • the medical imaging device 1 is configured to acquire acquisition data based on electromagnetic radiation 27.
  • the medical imaging device 1 has an acquisition unit.
  • the acquisition unit is a projection data acquisition unit with the radiation source 26, e.g. B. an X-ray source, and the detector 28, z. B. an X-ray detector, in particular an energy-resolving X-ray detector.
  • the medical imaging device 1 has an input device 38 and an output device 39, which are each connected to the control device 30.
  • the input device 38 is for inputting control information, e.g. B. image reconstruction parameters, examination parameters or the like.
  • the output device 39 is designed in particular for outputting control information, images and / or acoustic signals.
  • holes RCS, RCM for example, with threads
  • the various parts of the frame R in particular the transverse beams RL1, RL2 and the side parts RS1, RS2, can be connected to one another by means of the bores RCS.
  • the frame R can be connected to an actuator PFA of the positioning unit PF.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
EP17173761.2A 2017-05-31 2017-05-31 Module de focalisation pour un filtre de forme et filtre de forme destiné à régler une distribution de l'intensité spatiale d'un rayon x Active EP3217408B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17173761.2A EP3217408B1 (fr) 2017-05-31 2017-05-31 Module de focalisation pour un filtre de forme et filtre de forme destiné à régler une distribution de l'intensité spatiale d'un rayon x

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17173761.2A EP3217408B1 (fr) 2017-05-31 2017-05-31 Module de focalisation pour un filtre de forme et filtre de forme destiné à régler une distribution de l'intensité spatiale d'un rayon x

Publications (3)

Publication Number Publication Date
EP3217408A2 true EP3217408A2 (fr) 2017-09-13
EP3217408A3 EP3217408A3 (fr) 2017-12-27
EP3217408B1 EP3217408B1 (fr) 2021-07-21

Family

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Application Number Title Priority Date Filing Date
EP17173761.2A Active EP3217408B1 (fr) 2017-05-31 2017-05-31 Module de focalisation pour un filtre de forme et filtre de forme destiné à régler une distribution de l'intensité spatiale d'un rayon x

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EP (1) EP3217408B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3598949A1 (fr) 2018-07-27 2020-01-29 Siemens Healthcare GmbH Appareil de tomodensitométrie pourvu de filtres en forme de lamelle et de source de rayons x à foyer mobile
US11234662B2 (en) 2018-02-26 2022-02-01 Siemens Healthcare Gmbh Method and device for changing the spatial intensity distribution of an x-ray beam

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7403597B2 (en) 2005-04-22 2008-07-22 Siemens Aktiengesellschaft Radiation diaphragm in device having two diaphragms, and method for scanning a subject therewith
US8218721B2 (en) 2008-09-30 2012-07-10 Siemens Aktiengesellschaft X-ray beam modifying diaphragm and diaphragm device
US8873704B2 (en) 2011-02-25 2014-10-28 Siemens Aktiengesellschaft Filter for an X-ray device, and X-ray device embodying such a filter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58114800U (ja) * 1982-01-29 1983-08-05 株式会社島津製作所 コリメ−タ
JPH03120500A (ja) * 1989-10-04 1991-05-22 Toshiba Corp 多孔コリメータ及びその製造方法
JP4874755B2 (ja) * 2006-09-29 2012-02-15 富士フイルム株式会社 放射線画像撮影装置
JP5383266B2 (ja) * 2009-03-19 2014-01-08 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー コリメータユニット、放射線検出装置および放射線診断装置
JP5610461B2 (ja) * 2009-10-23 2014-10-22 ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー コリメータモジュール、ｘ線検出器及びｘ線ｃｔ装置
US10082473B2 (en) * 2015-07-07 2018-09-25 General Electric Company X-ray filtration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7403597B2 (en) 2005-04-22 2008-07-22 Siemens Aktiengesellschaft Radiation diaphragm in device having two diaphragms, and method for scanning a subject therewith
US8218721B2 (en) 2008-09-30 2012-07-10 Siemens Aktiengesellschaft X-ray beam modifying diaphragm and diaphragm device
US8873704B2 (en) 2011-02-25 2014-10-28 Siemens Aktiengesellschaft Filter for an X-ray device, and X-ray device embodying such a filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11234662B2 (en) 2018-02-26 2022-02-01 Siemens Healthcare Gmbh Method and device for changing the spatial intensity distribution of an x-ray beam
EP3598949A1 (fr) 2018-07-27 2020-01-29 Siemens Healthcare GmbH Appareil de tomodensitométrie pourvu de filtres en forme de lamelle et de source de rayons x à foyer mobile

Also Published As

Publication number Publication date
EP3217408B1 (fr) 2021-07-21
EP3217408A3 (fr) 2017-12-27

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