JP3909048B2 - X線ct装置およびx線管 - Google Patents
X線ct装置およびx線管 Download PDFInfo
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- JP3909048B2 JP3909048B2 JP2003313776A JP2003313776A JP3909048B2 JP 3909048 B2 JP3909048 B2 JP 3909048B2 JP 2003313776 A JP2003313776 A JP 2003313776A JP 2003313776 A JP2003313776 A JP 2003313776A JP 3909048 B2 JP3909048 B2 JP 3909048B2
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- Prior art keywords
- ray
- cathode
- anode
- ray tube
- rays
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- 238000010894 electron beam technology Methods 0.000 claims description 17
- 238000001914 filtration Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 31
- 238000002591 computed tomography Methods 0.000 description 16
- 238000003384 imaging method Methods 0.000 description 16
- 238000013480 data collection Methods 0.000 description 12
- 239000000126 substance Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- RPPBZEBXAAZZJH-UHFFFAOYSA-N cadmium telluride Chemical compound [Te]=[Cd] RPPBZEBXAAZZJH-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/405—Source units specially adapted to modify characteristics of the beam during the data acquisition process
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4021—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot
- A61B6/4028—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis involving movement of the focal spot resulting in acquisition of views from substantially different positions, e.g. EBCT
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4035—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis the source being combined with a filter or grating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/48—Diagnostic techniques
- A61B6/482—Diagnostic techniques involving multiple energy imaging
-
- 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]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
- H01J35/153—Spot position control
-
- 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
- G01N2223/40—Imaging
- G01N2223/419—Imaging computed tomograph
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/08—Targets (anodes) and X-ray converters
- H01J2235/086—Target geometry
Description
4 撮影テーブル
6 操作コンソール
20 X線管
110 アノード
112,114 回転板
122 回転軸
130 カソード
140 電子ビーム
152,154 焦点
402,404 X線ビーム
212,214 フィルタ
222,224 コリメータ
24 X線検出器
Claims (14)
- 3次元的位置が異なる複数の焦点から時分割で順次にX線を発生するX線管と、
前記複数の焦点からそれぞれ発生するX線についてそれぞれフィルタリングを行う複数のフィルタと、
前記複数の焦点からそれぞれ発生するX線の照射範囲を同一にするコリメータと、
前記複数の焦点からそれぞれ発生するX線ごとに被検体の複数ビューの投影データを収集する収集手段と、
前記投影データに基づいて画像を再構成する再構成手段と、
を具備するX線CT装置であって、
前記X線管は、
互いに対向するアノードおよびカソードを有しカソードからの電子が衝突するアノード上の焦点からX線を発生するX線管であって、
前記アノードは、前記カソードから放出された電子がその軌道上の複数の位置で時分割的に順次に衝突する複数の衝突部を有し、
前記アノードは、前記電子の軌道に平行な回転軸を共有する互いに平行な複数の回転板であって、各回転板は、少なくとも前記カソードに最も近いものから前記カソードから最も遠いものの1つ手前のものまでは、前記回転中心から前記電子の軌道までの距離より大きい大径部と回転中心から前記電子の軌道までの距離より小さい小径部を回転方向に沿って交互に有し、それら回転板の大径部が前記電子ビームの軌道に平行な方向において互いに重ならない、
ことを特徴とするX線CT装置。 - 前記複数の回転板は2つの回転板である、
ことを特徴とする請求項1に記載のX線CT装置。 - 3次元的位置が異なる複数の焦点から時分割で順次にX線を発生するX線管と、
前記複数の焦点からそれぞれ発生するX線についてそれぞれフィルタリングを行う複数のフィルタと、
前記複数の焦点からそれぞれ発生するX線の照射範囲を同一にするコリメータと、
前記複数の焦点からそれぞれ発生するX線ごとに被検体の複数ビューの投影データを収集する収集手段と、
前記投影データに基づいて画像を再構成する再構成手段と、
を具備するX線CT装置であって、
前記X線管は、
互いに対向するアノードおよびカソードを有しカソードからの電子が衝突するアノード上の焦点からX線を発生するX線管であって、
前記アノードは、前記カソードから放出された電子の軌道に平行な回転軸を共有する2つの回転板であって、これら回転板は互いに反対側の面に回転方向に沿って交互に配置されたX線発生部とX線非発生部を有し、互いに反対側の面のX線発生部が回転軸に平行な方向において互いに重ならず、
前記カソードは、前記2つの回転板の互いに反対側の面に衝突させる電子をそれぞれ発生する、
ことを特徴とするX線CT装置。 - 前記アノードおよび前記カソードの対は複数対である、
ことを特徴とする請求項3に記載のX線CT装置。 - 前記複数対は2対である、
ことを特徴とする請求項4に記載のX線CT装置。 - 前記焦点は全て同一の水平面上にある、
ことを特徴とする請求項4または請求項5に記載のX線CT装置。 - 前記焦点は全て水平面に対して傾斜した同一の平面上にある、
ことを特徴とする請求項4または請求項5記載のX線CT装置。 - 互いに対向するアノードおよびカソードを有しカソードからの電子が衝突するアノード上の焦点からX線を発生するX線管であって、
前記アノードは、前記カソードから放出された電子がその軌道上の複数の位置で時分割的に順次に衝突する複数の衝突部を有するX線管であって、
前記アノードは、前記電子の軌道に平行な回転軸を共有する互いに平行な複数の回転板であって、各回転板は、少なくとも前記カソードに最も近いものから前記カソードから最も遠いものの1つ手前のものまでは、前記回転中心から前記電子の軌道までの距離より大きい大径部と回転中心から前記電子の軌道までの距離より小さい小径部を回転方向に沿って交互に有し、それら回転板の大径部が前記電子ビームの軌道に平行な方向において互いに重ならない、
ことを特徴とするX線管。 - 前記複数の回転板は2つの回転板である、
ことを特徴とする請求項8に記載のX線管。 - 互いに対向するアノードおよびカソードを有しカソードからの電子が衝突するアノード上の焦点からX線を発生するX線管であって、
前記アノードは、前記カソードから放出された電子がその軌道上の複数の位置で時分割的に順次に衝突する複数の衝突部を有する、
X線管であって、
前記アノードは、前記カソードから放出された電子の軌道に平行な回転軸を共有する2つの回転板であって、これら回転板は互いに反対側の面に回転方向に沿って交互に配置されたX線発生部とX線非発生部を有し、互いに反対側の面のX線発生部が回転軸に平行な方向において互いに重ならず、
前記カソードは、前記2つの回転板の互いに反対側の面に衝突させる電子をそれぞれ発生する、
ことを特徴とするX線管。 - 前記アノードおよび前記カソードの対は複数対である、
ことを特徴とする請求項8ないし請求項10のうちのいずれか1つに記載のX線管。 - 前記複数対は2対である、
ことを特徴とする請求項11に記載のX線管。 - 前記焦点は全て同一の水平面上にある、
ことを特徴とする請求項11または請求項12に記載のX線管。 - 前記焦点は全て水平面に対して傾斜した同一の平面上にある、
ことを特徴とする請求項11または請求項12に記載のX線管。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003313776A JP3909048B2 (ja) | 2003-09-05 | 2003-09-05 | X線ct装置およびx線管 |
US10/924,111 US7187756B2 (en) | 2003-09-05 | 2004-08-23 | X-ray CT apparatus and X-ray tube |
CN2004100752156A CN1589744B (zh) | 2003-09-05 | 2004-09-03 | X射线计算断层照相设备和x射线管 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003313776A JP3909048B2 (ja) | 2003-09-05 | 2003-09-05 | X線ct装置およびx線管 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005080750A JP2005080750A (ja) | 2005-03-31 |
JP3909048B2 true JP3909048B2 (ja) | 2007-04-25 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2003313776A Expired - Fee Related JP3909048B2 (ja) | 2003-09-05 | 2003-09-05 | X線ct装置およびx線管 |
Country Status (3)
Country | Link |
---|---|
US (1) | US7187756B2 (ja) |
JP (1) | JP3909048B2 (ja) |
CN (1) | CN1589744B (ja) |
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US20050053189A1 (en) | 2005-03-10 |
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