JP7330033B2 - 計測用x線ct装置の校正方法、測定方法、及び、計測用x線ct装置 - Google Patents
計測用x線ct装置の校正方法、測定方法、及び、計測用x線ct装置 Download PDFInfo
- Publication number
- JP7330033B2 JP7330033B2 JP2019172253A JP2019172253A JP7330033B2 JP 7330033 B2 JP7330033 B2 JP 7330033B2 JP 2019172253 A JP2019172253 A JP 2019172253A JP 2019172253 A JP2019172253 A JP 2019172253A JP 7330033 B2 JP7330033 B2 JP 7330033B2
- Authority
- JP
- Japan
- Prior art keywords
- calibration jig
- subject
- ray
- boundary surface
- spherical calibration
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 24
- 238000005259 measurement Methods 0.000 claims description 30
- 238000012937 correction Methods 0.000 claims description 14
- 238000002591 computed tomography Methods 0.000 claims description 12
- 238000012876 topography Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000013598 vector Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013170 computed tomography imaging Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- A61B6/58—Testing, adjusting or calibrating thereof
- A61B6/582—Calibration
- A61B6/583—Calibration using calibration phantoms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [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
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
-
- 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
- A61B6/58—Testing, adjusting or calibrating thereof
- A61B6/582—Calibration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/30—Accessories, mechanical or electrical features
- G01N2223/303—Accessories, mechanical or electrical features calibrating, standardising
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Pathology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- High Energy & Nuclear Physics (AREA)
- Biophysics (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Optics & Photonics (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
Description
精度のX線CT測定ができる。
14…X線検出器
16…回転テーブル
30…球型校正治具
40…X線を透過しやすい材質の箱
W…被検体
Claims (4)
- 回転テーブル上に配置した被検体を回転させながらX線を照射し、その投影画像を再構成して被検体の断層画像を生成するようにした計測用X線CT装置の校正に際して、
予め半径が分かっている、要求される測定精度に対して球半径のばらつきが無視でき、真球と見なせる球型校正治具を被検体に接触させた状態でCTスキャンを行ってボリュームデータを生成し、
該ボリュームデータにおける被検体表面形状のプロファイルを取得すると共に、球型校正治具の中心座標から球型校正治具の境界面を計算し、
前記プロファイルの傾きから求めた被検体の境界面を球型校正治具の境界面と一致させるための補正値を求めることを特徴とする計測用X線CT装置の校正方法。 - 回転テーブル上に配置した被検体を回転させながらX線を照射し、その投影画像を再構成して被検体の断層画像を生成するようにした計測用X線CT装置による測定に際して、
予め半径が分かっている、要求される測定精度に対して球半径のばらつきが無視でき、真球と見なせる球型校正治具を被検体に接触させた状態でCTスキャンを行ってボリュームデータを生成し、
請求項1に記載の方法で求めた補正値を用いて被検体の境界面を求め、
該境界面を用いて被検体の形状を求めることを特徴とする計測用X線CT装置の測定方法。 - X線を透過する箱に、被検体と予め半径が分かっている、要求される測定精度に対して球半径のばらつきが無視でき、真球と見なせる球型校正治具を入れ、
前記箱内で前記球型校正治具と被検体を接触させた状態でCTスキャンを行ってボリュームデータを生成し、
請求項1に記載の方法で求めた補正値を用いて被検体の境界面を求め、
該境界面を用いて被検体の形状を求めることを特徴とする計測用X線CT装置の測定方法。 - 予め半径が分かっている、要求される測定精度に対して球半径のばらつきが無視でき、真球と見なせる球型校正治具と、
被検体と前記球型校正治具を収容する、X線を透過する箱と、
該箱内で前記球型校正治具と被検体を接触させた状態でCTスキャンを行ってボリュームデータを生成する手段と、
該ボリュームデータにおける被検体表面形状のプロファイルを取得する手段と、
前記球型校正治具の中心座標から前記ボリュームデータにおける該球型校正治具の境界面を計算する手段と、
請求項1に記載の方法で求めた補正値を用いて被検体の境界面を求める手段と、
該境界面を用いて被検体の形状を求める手段と、
を備えたことを特徴とする計測用X線CT装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019172253A JP7330033B2 (ja) | 2019-09-20 | 2019-09-20 | 計測用x線ct装置の校正方法、測定方法、及び、計測用x線ct装置 |
US17/024,061 US11510643B2 (en) | 2019-09-20 | 2020-09-17 | Calibration method and apparatus for measurement X-ray CT apparatus, measurement method and apparatus using the same, and measurement X-ray CT apparatus |
CN202010983851.8A CN112535490A (zh) | 2019-09-20 | 2020-09-18 | X射线ct装置及其校正方法和装置、测定方法和装置 |
DE102020005740.3A DE102020005740A1 (de) | 2019-09-20 | 2020-09-18 | Kalibrierverfahren und apparat für einen röntgen-ct-messapparat, messverfahren und apparat unter verwendung desselben, und röntgen-ct-messapparat |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019172253A JP7330033B2 (ja) | 2019-09-20 | 2019-09-20 | 計測用x線ct装置の校正方法、測定方法、及び、計測用x線ct装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021050937A JP2021050937A (ja) | 2021-04-01 |
JP7330033B2 true JP7330033B2 (ja) | 2023-08-21 |
Family
ID=74846080
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019172253A Active JP7330033B2 (ja) | 2019-09-20 | 2019-09-20 | 計測用x線ct装置の校正方法、測定方法、及び、計測用x線ct装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11510643B2 (ja) |
JP (1) | JP7330033B2 (ja) |
CN (1) | CN112535490A (ja) |
DE (1) | DE102020005740A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021231888A1 (en) * | 2020-05-14 | 2021-11-18 | Cignal Llc | Creating imagery for al model training in security screening |
US11585766B2 (en) * | 2020-05-29 | 2023-02-21 | James R. Glidewell Dental Ceramics, Inc. | CT scanner calibration |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006084262A (ja) | 2004-09-15 | 2006-03-30 | Shimadzu Corp | 画像処理方法および放射線断層撮像装置 |
US20170112462A1 (en) | 2015-10-23 | 2017-04-27 | Hexagon Metrology, Inc. | Three-dimensional computed tomography gauge |
JP2017133964A (ja) | 2016-01-28 | 2017-08-03 | コムコ株式会社 | 放射線画像撮影装置及び放射線画像撮影方法 |
JP2018063243A (ja) | 2016-10-13 | 2018-04-19 | 地方独立行政法人東京都立産業技術研究センター | Ct装置用校正器 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3427046B2 (ja) | 2000-08-29 | 2003-07-14 | 株式会社日立製作所 | 3次元寸法計測装置及びその計測方法 |
JP2004012407A (ja) | 2002-06-11 | 2004-01-15 | Hitachi Ltd | 透過画像提供システムおよびx線ct・dr撮影サービスシステム |
DE102010050949A1 (de) * | 2010-11-10 | 2012-05-10 | Carl Zeiss Industrielle Messtechnik Gmbh | Messanordnung für einen Computertomographen |
-
2019
- 2019-09-20 JP JP2019172253A patent/JP7330033B2/ja active Active
-
2020
- 2020-09-17 US US17/024,061 patent/US11510643B2/en active Active
- 2020-09-18 CN CN202010983851.8A patent/CN112535490A/zh active Pending
- 2020-09-18 DE DE102020005740.3A patent/DE102020005740A1/de active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006084262A (ja) | 2004-09-15 | 2006-03-30 | Shimadzu Corp | 画像処理方法および放射線断層撮像装置 |
US20170112462A1 (en) | 2015-10-23 | 2017-04-27 | Hexagon Metrology, Inc. | Three-dimensional computed tomography gauge |
JP2017133964A (ja) | 2016-01-28 | 2017-08-03 | コムコ株式会社 | 放射線画像撮影装置及び放射線画像撮影方法 |
JP2018063243A (ja) | 2016-10-13 | 2018-04-19 | 地方独立行政法人東京都立産業技術研究センター | Ct装置用校正器 |
Also Published As
Publication number | Publication date |
---|---|
US11510643B2 (en) | 2022-11-29 |
CN112535490A (zh) | 2021-03-23 |
US20210085279A1 (en) | 2021-03-25 |
JP2021050937A (ja) | 2021-04-01 |
DE102020005740A1 (de) | 2021-03-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5408873B2 (ja) | 座標測定装置におけるx線感知装置の校正方法 | |
US10478147B2 (en) | Calibration apparatus and method for computed tomography | |
JP6711410B2 (ja) | 放射線断層撮影装置の撮像倍率校正方法 | |
JP2020071181A (ja) | 計測用x線ct装置 | |
JP7330033B2 (ja) | 計測用x線ct装置の校正方法、測定方法、及び、計測用x線ct装置 | |
JP2019158534A (ja) | 計測用x線ct装置、及び、その断層画像生成方法 | |
CN110686624B (zh) | 利用由x射线ct装置获得的投影像的尺寸测定方法 | |
US11037337B2 (en) | Method and apparatus for generating measurement plan for measuring X-ray CT | |
WO2016139756A1 (ja) | 測定処理装置、x線検査装置、測定処理方法、測定処理プログラム、および構造物の製造方法 | |
JP2006162335A (ja) | X線検査装置、x線検査方法およびx線検査プログラム | |
Ortega et al. | A methodology to obtain traceability for internal and external measurements of Inconel 718 components by means of XRCT | |
JP5400704B2 (ja) | 配管検査装置および配管検査方法 | |
CN110261415B (zh) | 测量用x射线ct设备以及批量生产工件测量方法 | |
JP4988482B2 (ja) | 放射線検査装置、放射線検査方法および放射線検査プログラム | |
CN112461871A (zh) | 测量用x射线ct装置 | |
JP2009097937A (ja) | 試料分析装置、試料分析方法および試料分析プログラム | |
Affenzeller et al. | Measurement uncertainty evaluation of an X-ray computed tomography system | |
Sire et al. | X-ray cone beam CT system calibration | |
JP2010169636A (ja) | 形状測定装置 | |
Schick | Metrology CT technology and its applications in the precision engineering industry | |
WO2016190218A1 (ja) | 測定方法および放射線撮影装置 | |
JP7216953B2 (ja) | X線ctにおけるctボリュームの表面抽出方法 | |
Stolfi et al. | Tolerance Verification of an Industrial Assembly using Computed Tomography | |
JP2023130084A (ja) | X線ct装置の評価装置および評価方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20220818 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20230428 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230606 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20230703 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20230718 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20230808 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7330033 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |