JP2001068045A - X-ray tube - Google Patents
X-ray tubeInfo
- Publication number
- JP2001068045A JP2001068045A JP24524399A JP24524399A JP2001068045A JP 2001068045 A JP2001068045 A JP 2001068045A JP 24524399 A JP24524399 A JP 24524399A JP 24524399 A JP24524399 A JP 24524399A JP 2001068045 A JP2001068045 A JP 2001068045A
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- JP
- Japan
- Prior art keywords
- filament
- focusing
- focusing groove
- longitudinal direction
- electron beam
- 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.)
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- X-Ray Techniques (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明はＸ線管に関する。[0001] The present invention relates to an X-ray tube.
【０００２】[0002]
【従来の技術】陽極が回転する構造のＸ線管たとえば回
転陽極型Ｘ線管は、回転状態にある陽極ターゲットに対
して電子ビームを衝突させ、陽極ターゲットからＸ線を
発生させる電子管で、医療用診断装置などに多く使用さ
れている。2. Description of the Related Art An X-ray tube having a structure in which an anode rotates, for example, a rotating anode type X-ray tube, is a medical tube in which an electron beam collides with a rotating anode target to generate X-rays from the anode target. It is often used in diagnostic equipment for medical use.
【０００３】ここで、従来のＸ線管について、回転陽極
型Ｘ線管を例にとり、その円盤状回転陽極および陰極構
体の各部分を抜き出して示した図４の断面図を参照して
説明する。符号４１は円盤状回転陽極で、円盤状回転陽
極４１は回転体などの回転機構に連結され、回転する構
造になっている。円盤状回転陽極４１の周辺は傾斜し、
その傾斜面４２に、Ｘ線を発生する陽極ターゲット４３
が環状に設けられている。陽極ターゲット４３と対向し
て陰極構体４４が配置され、陰極構体４４は板状支持体
４５に固定されている。陰極構体４４は、集束体４６な
どから構成され、その一部に集束溝４７が形成されてい
る。集束溝４７内には、電子ビームを発生するフィラメ
ント（図示せず）が配置されている。Here, a conventional X-ray tube will be described with reference to a sectional view of FIG. 4 which shows a rotary anode type and a cathode structure of a rotary anode type X-ray tube as an example, and shows each part of the disk-shaped rotary anode and cathode assembly. . Reference numeral 41 denotes a disk-shaped rotating anode. The disk-shaped rotating anode 41 is connected to a rotating mechanism such as a rotating body and has a structure of rotating. The periphery of the disk-shaped rotating anode 41 is inclined,
An anode target 43 for generating X-rays is provided on the inclined surface 42.
Are provided in an annular shape. A cathode structure 44 is arranged facing the anode target 43, and the cathode structure 44 is fixed to a plate-like support 45. The cathode structure 44 includes a focusing body 46 and the like, and a focusing groove 47 is formed in a part thereof. In the focusing groove 47, a filament (not shown) for generating an electron beam is arranged.
【０００４】上記した構成において、円盤状回転陽極４
１を回転させ、陽極ターゲット４３を回転させる。この
状態で、陰極構体４４のフィラメントから放出された電
子ビームｅを陽極ターゲット４３に衝突させ、陽極ター
ゲット４３からＸ線を発生させる。発生したＸ線は矢印
Ｙ方向に進み、外部に取り出される。[0004] In the above configuration, the disk-shaped rotary anode 4
1 is rotated, and the anode target 43 is rotated. In this state, the electron beam e emitted from the filament of the cathode assembly 44 is caused to collide with the anode target 43 to generate X-rays. The generated X-ray advances in the direction of arrow Y and is extracted to the outside.
【０００５】次に、電子ビームを放出する陰極構体４４
について図５を参照して説明する。図５は、図４の矢印
Ａで示したように、集束溝４７を垂直方向から見た図
で、符号５１は、たとえば、陽極ターゲット４３と対向
する集束体４５表面における集束溝４７の開口部分を示
している。集束溝４７は１つの方向、たとえば図の左右
方向に長く形成され、その長手方向において幅が一様な
ほぼ長方形状をしている。そして、集束溝４７内にフィ
ラメント５２が配置されている。このとき、フィラメン
ト５２の長手方向と集束溝４７の長手方向とが一致する
ように配置される。同時に、集束溝４７の長手方向の中
心位置ｍと、フィラメント５２の長手方向の中心位置ｎ
とが一致するように配置されている。Next, a cathode assembly 44 for emitting an electron beam
Will be described with reference to FIG. FIG. 5 is a view of the focusing groove 47 as viewed from the vertical direction as indicated by an arrow A in FIG. 4. Reference numeral 51 denotes, for example, an opening portion of the focusing groove 47 on the surface of the focusing body 45 facing the anode target 43. Is shown. The focusing groove 47 is formed to be long in one direction, for example, the left-right direction in the figure, and has a substantially rectangular shape having a uniform width in the longitudinal direction. The filament 52 is arranged in the focusing groove 47. At this time, the filaments 52 are arranged so that the longitudinal direction of the filament 52 and the longitudinal direction of the focusing groove 47 coincide. At the same time, the longitudinal center position m of the focusing groove 47 and the longitudinal center position n of the filament 52
And are arranged so as to match.
【０００６】[0006]
【発明が解決しようとする課題】従来の回転陽極型Ｘ線
管は、陽極ターゲット４３が円盤状回転陽極４１の傾斜
面４２に形成されていることもあり、陽極ターゲット４
３と集束溝４７とは必ずしも平行になっていない。この
ため、集束溝４７と陽極ターゲット４３間の距離が、集
束溝４７の長手方向の位置によって相違する。したがっ
て、図４の矢印Ｂで示すように陽極タ一ゲット４３を垂
直方向から見ると、図６（ａ）で示すように、電子ビー
ムの焦点６１の形状は、放射口側すなわち陽極ターゲッ
ト４３から発生したＸ線が進む線分ｂ−ｂの側で幅が狭
くなり、これと反対の反放射口側すなわち線分ａ−ａの
側で幅が広くなり、焦点６１の幅が一様にならない。線
ｍは焦点３１の中心線を示している。また、焦点６１上
における電子ビーム密度は、図（ｂ）に示すように放射
口側ｂが大きく、反放射口側ａが小さくなる。In the conventional rotary anode type X-ray tube, the anode target 43 may be formed on the inclined surface 42 of the disk-shaped rotary anode 41.
3 and the focusing groove 47 are not always parallel. Therefore, the distance between the focusing groove 47 and the anode target 43 differs depending on the position of the focusing groove 47 in the longitudinal direction. Accordingly, when the anode target 43 is viewed from the vertical direction as shown by the arrow B in FIG. 4, the shape of the focal point 61 of the electron beam is changed from the emission port side, that is, from the anode target 43, as shown in FIG. The width decreases on the side of the line segment bb where the generated X-rays travel, and the width increases on the opposite anti-emission port side, that is, on the side of the line segment aa, and the width of the focal point 61 is not uniform. . The line m indicates the center line of the focal point 31. Further, the electron beam density on the focal point 61 is large on the emission port side b and small on the non-radiation port side a as shown in FIG.
【０００７】この場合、図６（ａ）の反放射口側に近い
線分ａ−ａ、および、放射口側に近い線分ｂ−ｂにおけ
る焦点の幅、および、電子ビーム密度を図で示すと、図
の（ｃ）および（ｄ）のようになる。図（ｃ）、（ｄ）
の縦軸は焦点の幅、横軸は電子ビーム密度を示してい
る。In this case, the width of the focal point and the electron beam density in a line segment aa near the anti-radiation port side and a line segment bb near the radiation port side in FIG. And (c) and (d) of FIG. Figures (c) and (d)
The vertical axis indicates the focus width, and the horizontal axis indicates the electron beam density.
【０００８】電子ビーム密度に大小があると、電子ビー
ム密度が大きい陽極ターゲット部分が溶け易くなり、回
転陽極型Ｘ線管への熱入力は放射口側における焦点の電
子ビーム密度で制限される。When the electron beam density is large or small, the anode target portion having a large electron beam density is easily melted, and the heat input to the rotating anode type X-ray tube is limited by the electron beam density at the focal point on the radiation port side.
【０００９】この発明は、上記した欠点を解決するもの
で、陽極ターゲット上に形成される電子ビームの焦点の
幅が一様な回転陽極型Ｘ線管を提供することを目的とし
ている。SUMMARY OF THE INVENTION An object of the present invention is to provide a rotating anode type X-ray tube having a uniform focal point of an electron beam formed on an anode target.
【００１０】[0010]
【課題を解決するための手段】この発明は、１つの方向
に長い集束溝が形成された集束体およびこの集束体の前
記集束溝内にその長手方向を前記集束溝の長手方向に一
致させて配置したフィラメントを有する陰極構体と、前
記フィラメントが放出する電子ビームの衝突によってＸ
線を発生する陽極ターゲットが設けられた陽極とを具備
したＸ線管において、前記集束溝の長手方向の中心位置
が前記フィラメントの長手方向の中心位置よりも前記Ｘ
線が進む放射口側にずれていることを特徴としている。SUMMARY OF THE INVENTION According to the present invention, there is provided a converging body having a converging groove formed in one direction and a longitudinal direction in the converging groove of the converging body which coincides with a longitudinal direction of the converging groove. A cathode structure having a filament disposed therein and an electron beam emitted from the filament impinge upon the cathode assembly.
An X-ray tube including an anode provided with an anode target for generating X-rays, wherein the center position of the focusing groove in the longitudinal direction is larger than the center position of the filament in the longitudinal direction.
It is characterized in that the line is shifted to the emission port side where the line travels.
【００１１】[0011]
【発明の実施の形態】本発明の実施形態について、回転
陽極型Ｘ線管を例にとり、その円盤状回転陽極および陰
極構体の部分を抜き出して示した図１の断面図を参照し
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to a sectional view of FIG. 1 which shows a rotating anode type X-ray tube as an example and shows a disk-shaped rotating anode and a cathode assembly. .
【００１２】符号１１は円盤状回転陽極で、円盤状回転
陽極１１は回転体などの回転機構（図示せず）に連結さ
れ、回転する構造になっている。円盤状回転陽極１１の
周辺は傾斜し、その傾斜面１２に、Ｘ線を発生する陽極
ターゲット１３が環状に設けられている。陽極ターゲッ
ト１３と対向して陰極構体１４が配置され、陰極構体１
４は円板状支持体１５に固定されている。陰極構体１４
は、集束体１６などから構成され、その一部に集束溝１
７が形成され、集束溝１７内に電子ビームを発生するフ
ィラメント（図示せず）が配置されている。Reference numeral 11 denotes a disk-shaped rotating anode. The disk-shaped rotating anode 11 is connected to a rotating mechanism (not shown) such as a rotating body and has a structure of rotating. The periphery of the disk-shaped rotating anode 11 is inclined, and an anode target 13 for generating X-rays is provided on the inclined surface 12 in a ring shape. A cathode structure 14 is disposed so as to face the anode target 13, and the cathode structure 1 is provided.
4 is fixed to the disk-shaped support 15. Cathode assembly 14
Is composed of a focusing body 16 and the like, and a part of the focusing groove 1
7 is formed, and a filament (not shown) for generating an electron beam is arranged in the focusing groove 17.
【００１３】上記した構成において、円盤状回転陽極１
１を回転させ、陽極ターゲット１３を回転させる。この
状態で、陰極構体１４のフィラメントから放出された電
子ビームｅを陽極ターゲット１３に衝突させ、陽極ター
ゲット１３からＸ線を発生させる。発生したＸ線は矢印
Ｙ方向に進み、外部に取り出される。[0013] In the above configuration, the disk-shaped rotating anode 1
1 and the anode target 13 is rotated. In this state, the electron beam e emitted from the filament of the cathode assembly 14 collides with the anode target 13 to generate X-rays from the anode target 13. The generated X-ray advances in the direction of arrow Y and is extracted to the outside.
【００１４】次に、電子ビームを放出する陰極構体１４
について図２を参照して説明する。図２は、図１におい
て矢印Ａで示すように、陰極構体１４の集束溝１７の部
分を垂直方向に見た図で、符号２１は、集束溝１７の開
口で、たとえば陽極ターゲット１３と対向する集束体１
６表面における集束溝１７の開口部分を示し、集束溝１
６内にフィラメント２２が配置されている。この場合、
フィラメント２２の長手方向と集束溝１７の長手方向と
が一致するように配置される。これらの長手方向は、Ｘ
線が進む矢印Ｙ方向（図１）とほぼ一致している。そし
て、集束溝１７の長手方向の中心位置ｐが、フィラメン
ト２２の長手方向の中心位置ｑよりも、放射口側すなわ
ち陽極ターゲット１３から発生したＸ線が進む側にずら
して配置されている。Next, a cathode structure 14 for emitting an electron beam
Will be described with reference to FIG. FIG. 2 is a vertical view of a portion of the focusing groove 17 of the cathode structure 14 as indicated by an arrow A in FIG. 1. Reference numeral 21 denotes an opening of the focusing groove 17 which faces, for example, the anode target 13. Focusing body 1
6 shows the opening of the focusing groove 17 on the surface of the focusing groove 1;
A filament 22 is arranged in 6. in this case,
The filament 22 is arranged such that the longitudinal direction of the filament 22 and the longitudinal direction of the focusing groove 17 coincide with each other. These longitudinal directions are X
The line substantially coincides with the arrow Y direction (FIG. 1) in which the line advances. The central position p of the focusing groove 17 in the longitudinal direction is shifted from the central position q of the filament 22 in the longitudinal direction to the emission port side, that is, the side where X-rays generated from the anode target 13 travel.
【００１５】集束溝１７は１つの方向たとえばＸ線が進
む図の左右方向に長く形成され、その４隅部分は、集束
溝１７を垂直方向から見て曲面Ｒ１〜Ｒ４に形成されて
いる。集束溝１７の長手方向に沿う幅Ｗ、すなわち長手
方向に直交する方向の幅は、４隅に形成された曲面Ｒ１
〜Ｒ４の一部を除き、放射口側すなわち陽極ターゲット
１３から発生したＸ線が進む側で広く形成され、その反
対側の反放射口側に向って徐々に狭くなっている。ま
た、集束溝１７の長手方向に位置する内壁、たとえば放
射口側に位置する曲面Ｒ１と反放射口側に位置する曲面
Ｒ２とを結ぶ集束溝１７の内壁１７ａ、および、放射口
側に位置する曲面Ｒ４と反放射口側に位置する曲面Ｒ３
とを結ぶ集束溝１７の内壁１７ｂはそれぞれ、フィラメ
ント２２の中心線Ｘに対して対称で、かつ、中心線Ｘに
対して同じ傾斜に形成され、同時に、集束溝１７の幅は
直線的に徐々に狭くなっている。The focusing groove 17 is formed to be long in one direction, for example, in the left-right direction in the figure where the X-ray travels, and its four corners are formed on curved surfaces R1 to R4 when the focusing groove 17 is viewed from the vertical direction. The width W of the focusing groove 17 along the longitudinal direction, that is, the width in the direction orthogonal to the longitudinal direction is a curved surface R1 formed at four corners.
Except for a part of .about.R4, it is formed wider on the emission port side, that is, on the side on which the X-rays generated from the anode target 13 travel, and gradually narrows toward the opposite anti-emission port side. Further, the inner wall 17a of the focusing groove 17 that connects the inner wall positioned in the longitudinal direction of the focusing groove 17, for example, the curved surface R1 located on the radiation opening side and the curved surface R2 located on the anti-radiation opening side, and located on the emission opening side. Curved surface R4 and curved surface R3 located on the anti-radiation port side
Are formed symmetrically with respect to the center line X of the filament 22 and at the same inclination with respect to the center line X. At the same time, the width of the focusing groove 17 is gradually and linearly increased. It is narrow.
【００１６】上記した構成によれば、集束溝１７の形成
方向、たとえば集束体１６表面における集束溝１７の開
口で形成される平面の向きと、集束溝１７の開口直下に
位置する陽極ターゲット１３の円盤状回転陽極１１のそ
の径方向における向きとが平行に形成されていない場合
でも、図１の矢印Ｂ方向、すなわち陽極タ一ゲット１３
上に形成される電子ビームの焦点を垂直方向からみる
と、図３（ａ）の符号３１で示すように長手方向でほぼ
一様の幅となる。線ｍは焦点３１の中心線を示してい
る。また、焦点３１上における電子ビームの密度も、図
（ｂ）に示すように全体にわたりほぼ一様となる。According to the above configuration, the direction of formation of the focusing groove 17, for example, the direction of the plane formed by the opening of the focusing groove 17 on the surface of the focusing body 16, and the direction of the anode target 13 located immediately below the opening of the focusing groove 17. Even when the disk-shaped rotary anode 11 is not formed in parallel with its radial direction, the direction of the arrow B in FIG.
When the focal point of the electron beam formed above is viewed from the vertical direction, it has a substantially uniform width in the longitudinal direction as indicated by reference numeral 31 in FIG. The line m indicates the center line of the focal point 31. Further, the density of the electron beam on the focal point 31 is also substantially uniform over the whole as shown in FIG.
【００１７】この場合、図３（ａ）の反放射口側に近い
線分ａ−ａ、および、放射口側に近い線分ｂ−ｂにおけ
る焦点３１の幅、および、電子ビーム密度をそれぞれ図
で示すと、図の（ｃ）、（ｄ）のようになり、どちらも
全体にわたりほぼ一様になる。なお、図（ｃ）、（ｄ）
の縦軸は焦点の幅、横軸は電子ビーム密度を示してい
る。In this case, the width of the focal point 31 and the electron beam density in a line segment aa near the anti-radiation port side and a line segment bb near the radiation port side in FIG. , The results are as shown in (c) and (d) in the figure, and both are almost uniform throughout. (C), (d)
The vertical axis indicates the focus width, and the horizontal axis indicates the electron beam density.
【００１８】上記の実施形態では、集束溝の長手方向の
中心位置をフィラメントの長手方向の中心位置よりもＸ
線が進む放射口側にずらし、同時に、集束溝の幅を、放
射口側の方を反放射口側よりも大きくしている。しか
し、集束溝の長手方向の中心位置をフィラメントの長手
方向の中心位置よりもＸ線が進む放射口側にずらす構
成、あるいは、集束溝の幅を、放射口側の方を反放射口
側よりも大きくする構成によっても電子ビーム焦点の幅
を均一化できる。なお、両方の構成を組み合わせれば、
電子ビーム焦点の幅および電子ビーム密度をより均一化
できる。In the above-described embodiment, the center position of the focusing groove in the longitudinal direction is set to be smaller than the center position of the filament in the longitudinal direction by X.
The width of the focusing groove is shifted to the radiation port side where the line advances, and at the same time, the width of the focusing groove is made larger on the radiation port side than on the non-radiation port side. However, a configuration in which the center position in the longitudinal direction of the focusing groove is shifted to the emission port side where the X-rays advance from the center position in the longitudinal direction of the filament, or the width of the focusing groove is set such that the emission port side is closer to the anti-emission port side The width of the focal point of the electron beam can also be made uniform by using a configuration in which the width is increased. If you combine both configurations,
The width of the electron beam focus and the electron beam density can be made more uniform.
【００１９】上記したように、本発明によれば、陽極タ
ーゲット上に形成される電子ビーム焦点の形状が均整の
取れたほぼ長方形となる。このため、被写体を撮影した
際のボケの程度が一定となり、画質が向上する。また、
電子ビーム密度も、反放射口側から放射口側までほぼ均
一化する。そのため、電子ビーム密度が不均一の場合
に、電子ビーム密度の高い領域で決定されていたＸ線管
への熱入力の制約がなくなり、Ｘ線管に対する熱入力を
向上できる。As described above, according to the present invention, the shape of the focal point of the electron beam formed on the anode target becomes a well-balanced and substantially rectangular shape. Therefore, the degree of blurring when the subject is photographed becomes constant, and the image quality is improved. Also,
The electron beam density is also substantially uniform from the anti-radiation port side to the radiation port side. Therefore, when the electron beam density is non-uniform, there is no longer any restriction on the heat input to the X-ray tube determined in the region where the electron beam density is high, and the heat input to the X-ray tube can be improved.
【００２０】なお、上記の実施形態では、回転陽極型Ｘ
線管の例で説明しているが、この発明は固定陽極型Ｘ線
管についても適用できる。In the above embodiment, the rotating anode type X
Although the present invention has been described with reference to an example of a tube, the present invention is also applicable to a fixed anode X-ray tube.
【００２１】[0021]
【発明の効果】この発明のよれば、陽極ターゲット上に
形成される焦点の幅が一様な回転陽極型Ｘ線管が実現さ
れる。According to the present invention, a rotating anode X-ray tube having a uniform focal spot formed on the anode target is realized.
【図１】この発明の実施形態を説明するための断面図で
ある。FIG. 1 is a cross-sectional view for explaining an embodiment of the present invention.
【図２】この発明に係る集束溝とフィラメントの配置関
係を説明するための正面図である。FIG. 2 is a front view for explaining an arrangement relationship between a focusing groove and a filament according to the present invention.
【図３】この発明に係る電子ビーム焦点の形成状態を説
明するための図である。FIG. 3 is a diagram for explaining a state of forming an electron beam focus according to the present invention.
【図４】従来例を説明するための断面図である。FIG. 4 is a cross-sectional view for explaining a conventional example.
【図５】従来例に係る集束溝とフィラメントの配置関係
を説明するための正面図である。FIG. 5 is a front view for explaining an arrangement relationship between a focusing groove and a filament according to a conventional example.
【図６】従来例に係る電子ビーム焦点の形成状態を説明
するための図である。FIG. 6 is a diagram for explaining a state of forming an electron beam focus according to a conventional example.
１１…円盤状回転陽極 １２…円盤状回転陽極の傾斜面 １３…陽極タ一ゲット １４…陰極構体 １５…陰極構体の支持体 １６…集束体 １７…集束溝 ２１…集束溝の開口 ２２…フィラメント ｐ…集束溝の長手方向の中心位置 ｑ…フィラメントの長手方向の中心位置 DESCRIPTION OF SYMBOLS 11 ... Disc-shaped rotary anode 12 ... Slope of a disc-shaped rotary anode 13 ... Anode target 14 ... Cathode assembly 15 ... Cathode assembly support 16 ... Converging body 17 ... Converging groove 21 ... Opening of converging groove 22 ... Filament p ... Longitudinal center position of the focusing groove q ... Longitudinal center position of the filament
Claims (4)
束体およびこの集束体の前記集束溝内にその長手方向を
前記集束溝の長手方向に一致させて配置したフィラメン
トを有する陰極構体と、前記フィラメントが放出する電
子ビームの衝突によってＸ線を発生する陽極ターゲット
が設けられた陽極とを具備したＸ線管において、前記集
束溝の長手方向の中心位置が前記フィラメントの長手方
向の中心位置よりも前記Ｘ線が進む放射口側にずれてい
ることを特徴とするＸ線管。A cathode assembly having a focusing body having a focusing groove long in one direction and a filament disposed in the focusing groove of the focusing body such that a longitudinal direction thereof is aligned with a longitudinal direction of the focusing groove. An anode provided with an anode target for generating X-rays by collision of an electron beam emitted from the filament, wherein the center of the focusing groove in the longitudinal direction is located at the center of the filament in the longitudinal direction. An X-ray tube, wherein the X-ray tube is further shifted toward a radiation port through which the X-ray travels.
集束溝の幅が、放射口側の方がこれと反対側の反放射口
側よりも大きく形成されている請求項１記載のＸ線管。2. The X-ray according to claim 1, wherein the width of the focusing groove in a direction orthogonal to the direction in which the X-ray travels is formed to be larger on the radiation port side than on the opposite anti-radiation port side. tube.
束体およびこの集束体の前記集束溝内にその長手方向を
前記集束溝の長手方向に一致させて配置したフィラメン
トを有する陰極構体と、前記フィラメントが放出する電
子ビームの衝突によってＸ線を発生する陽極ターゲット
が設けられた陽極とを具備したＸ線管において、Ｘ線が
進む方向と直交する方向における前記集束溝の幅が、前
記Ｘ線が進む放射口側の方がこれと反対側の反放射口側
よりも大きく形成されていることを特徴とするＸ線管。3. A cathode assembly having a focusing body having a focusing groove long in one direction and a filament disposed in the focusing groove of the focusing body such that a longitudinal direction thereof is aligned with a longitudinal direction of the focusing groove. An anode provided with an anode target that generates X-rays by collision of electron beams emitted by the filament, wherein the width of the focusing groove in a direction orthogonal to the direction in which the X-rays travel is An X-ray tube characterized in that the emission port side on which X-rays travel is formed larger than the opposite emission port side on the opposite side.
内壁が、フィラメントの中心線に対し対称に形成されて
いる請求項１ないし請求項３のいずれか１つに記載のＸ
線管。4. The X according to claim 1, wherein the two inner walls of the focusing groove located in the longitudinal direction thereof are formed symmetrically with respect to the center line of the filament.
Wire tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24524399A JP4260993B2 (en) | 1999-08-31 | 1999-08-31 | X-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24524399A JP4260993B2 (en) | 1999-08-31 | 1999-08-31 | X-ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001068045A true JP2001068045A (en) | 2001-03-16 |
| JP4260993B2 JP4260993B2 (en) | 2009-04-30 |
Family
ID=17130797
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24524399A Expired - Lifetime JP4260993B2 (en) | 1999-08-31 | 1999-08-31 | X-ray tube |
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| Country | Link |
|---|---|
| JP (1) | JP4260993B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006324230A (en) * | 2005-04-19 | 2006-11-30 | Rigaku Corp | X-ray tube |
| JP2007115552A (en) * | 2005-10-21 | 2007-05-10 | Rigaku Corp | Filament for x-ray tube and x-ray tube |
| WO2021049639A1 (en) * | 2019-09-13 | 2021-03-18 | キヤノン電子管デバイス株式会社 | X-ray tube |
-
1999
- 1999-08-31 JP JP24524399A patent/JP4260993B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006324230A (en) * | 2005-04-19 | 2006-11-30 | Rigaku Corp | X-ray tube |
| JP4669428B2 (en) * | 2005-04-19 | 2011-04-13 | 株式会社リガク | X-ray tube |
| JP2007115552A (en) * | 2005-10-21 | 2007-05-10 | Rigaku Corp | Filament for x-ray tube and x-ray tube |
| JP4662355B2 (en) * | 2005-10-21 | 2011-03-30 | 株式会社リガク | X-ray tube filament and X-ray tube |
| WO2021049639A1 (en) * | 2019-09-13 | 2021-03-18 | キヤノン電子管デバイス株式会社 | X-ray tube |
| JP2021044226A (en) * | 2019-09-13 | 2021-03-18 | キヤノン電子管デバイス株式会社 | X-ray tube |
| JP7196046B2 (en) | 2019-09-13 | 2022-12-26 | キヤノン電子管デバイス株式会社 | X-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4260993B2 (en) | 2009-04-30 |
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