JP2614219B2 - Manufacturing method of sensitivity compensation intensifying screen - Google Patents
Manufacturing method of sensitivity compensation intensifying screenInfo
- Publication number
- JP2614219B2 JP2614219B2 JP62018986A JP1898687A JP2614219B2 JP 2614219 B2 JP2614219 B2 JP 2614219B2 JP 62018986 A JP62018986 A JP 62018986A JP 1898687 A JP1898687 A JP 1898687A JP 2614219 B2 JP2614219 B2 JP 2614219B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- intensifying screen
- sensitivity
- layer
- light absorbing
- 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.)
- Expired - Lifetime
Links
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- Luminescent Compositions (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Conversion Of X-Rays Into Visible Images (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、放射線写真の撮影時に使用される感度補償
増感紙の製造方法に係り、さらに詳しくは感度補償部の
輪郭が写真に写し出されることのない感度補償増感紙の
製造方法に関する。Description of the Invention [Object of the Invention] (Field of Industrial Application) The present invention relates to a method of manufacturing a sensitivity-compensating intensifying screen used at the time of radiography, and more particularly, to a contour of a sensitivity compensating section. The present invention relates to a method for producing a sensitivity-compensating intensifying screen which does not appear on photographs.
（従来の技術） 一般に、放射線撮影に際して、撮影系の感度を向上さ
せるために、感光性フィルムを２枚の増感紙の間に密着
させて撮影することが行われている。(Prior Art) In general, upon radiation imaging, in order to improve the sensitivity of an imaging system, an image is taken by closely contacting a photosensitive film between two intensifying screens.
この増感紙は、支持体上に蛍光体層とこれを保護する
比較的薄い保護膜とを順に設けたもので構成されてい
る。This intensifying screen is constituted by sequentially providing a phosphor layer and a relatively thin protective film for protecting the phosphor layer on a support.
ところでこのような増感紙においては、同一平面内の
蛍光体分布がほぼ一様であるため、これを用いて例えば
胸部疾患の診断のための胸部Ｘ線撮影を行った場合、Ｘ
線の透過度の異なる部分を１枚のＸ線写真で撮影するこ
とは困難であった。By the way, in such an intensifying screen, since the phosphor distribution in the same plane is almost uniform, when this is used to perform chest X-ray imaging for diagnosing a chest disease, for example,
It has been difficult to photograph portions having different line transmittances with one X-ray photograph.
このため近年、例えば１枚の胸部Ｘ線写真中にＸ線吸
収の極端に異なる肺野と気管、気管支、脊柱等とを良好
なコントラストで撮像することを可能にするため、蛍光
体層からの発光を吸収する光吸収層を例えば保護膜上に
部分的に設け、臓器間のＸ線の吸収量の違いを補うよう
にした感度補償増感紙が使用されている。For this reason, in recent years, for example, in order to make it possible to image lung fields and trachea, bronchus, spine, etc. with extremely different X-ray absorptions in a single chest X-ray with good contrast, A sensitivity-compensating intensifying screen is used in which a light-absorbing layer for absorbing light emission is partially provided on, for example, a protective film so as to compensate for a difference in the amount of X-rays absorbed between organs.
このような感度補償増感紙は、光吸収層として蛍光体
からの発光色と補色の関係にある色の顔料等をＸ線の透
過量の多い部分に対応するように、例えば保護膜とする
フィルム上に印刷したものである。またこの光吸収層の
輪郭が写真上に写しだされないように、光吸収部からの
光透過部への濃度変化を階調的にさせて用いている。Such a sensitivity-compensating intensifying screen is formed, for example, as a protective film so that a light-absorbing layer, such as a pigment of a color complementary to the emission color from the phosphor, is applied to a portion having a high X-ray transmission amount. Printed on film. Further, in order to prevent the outline of the light absorbing layer from appearing on the photograph, the density change from the light absorbing portion to the light transmitting portion is used in gradation.
従来、この階調変化の方法としては、濃度を変えて着
色した複数のフィルムを光吸収部より光透過部に向かっ
て順次濃度が薄くなるように重ね合せて撮影したものを
写真製版用原版として使用し、グラビア印刷等の印刷技
法により形成することにより行われていた。Conventionally, as a method of changing the gradation, a photolithographic master is obtained by superimposing a plurality of films colored by changing the density so that the density gradually decreases from the light absorbing portion toward the light transmitting portion. It has been performed by using and forming by a printing technique such as gravure printing.
（発明が解決しようとする問題点） しかしながらこのような方法で光吸収層の階調変化を
形成したものは、印刷段階における濃度変化の境界を肉
眼では識別できない程度に階調変化させることができて
も、実際に放射線撮影を行ってみるとこの境界が筋状パ
ターンとして写しだされてしまうため、診断時の障害と
なるという問題があった。(Problems to be Solved by the Invention) However, when the gradation change of the light absorbing layer is formed by such a method, the gradation change at the printing stage can be changed to such an extent that the boundary cannot be recognized by the naked eye. However, when radiation imaging is actually performed, this boundary is displayed as a streak pattern, which poses a problem in diagnosis.
本発明はこのような問題点を解決するためになされた
もので、光吸収層の濃度変化の境界線が撮像されること
なく感度補償を行い、診断に支障のない放射線撮影を行
うことのできる感度補償増感紙の製造方法を提供するこ
とを目的とする。The present invention has been made in order to solve such a problem, and it is possible to perform sensitivity compensation without capturing an image of a boundary line of a density change of a light absorbing layer, thereby performing radiation imaging without hindering diagnosis. It is an object of the present invention to provide a method for producing a sensitivity compensation intensifying screen.
［発明の構成］ （問題点を解決するための手段） 本発明の感度補償増感紙の製造方法は、支持体と、こ
の支持体上に設けられた蛍光体層と、この蛍光体層上に
形成された保護膜と、前記蛍光体層からの発光を吸収す
る光吸収層とから構成される感度補償増感紙の製造方法
において、撮影対象部位となる人体の放射線写真のぼか
したものを写真製版用原版として用いて、単層からなる
前記光吸収層を印刷技法により形成する工程を有するこ
とを特徴としている。[Constitution of the Invention] (Means for Solving the Problems) The method for producing a sensitivity-compensating intensifying screen of the present invention comprises a support, a phosphor layer provided on the support, and a phosphor layer on the support. In a method of manufacturing a sensitivity-compensating intensifying screen comprising a protective film formed on a substrate and a light-absorbing layer that absorbs light emitted from the phosphor layer, a blurred one of a radiograph of a human body to be an imaging target site is obtained. The method is characterized in that the method comprises a step of forming the light absorbing layer composed of a single layer by a printing technique, using the same as a photomechanical master.
本発明における光吸収層の形成方法は、撮影対象部位
となる標準的体型者の放射線写真を例えば焦点位置をず
らして撮影し、これを複数回繰返し行うことによって、
当初の放射線写真に写っている微細部や骨部等の辺縁が
消えるまでぼかしたものを写真製版用原版として使用し
て、例えばグラビア印刷のような印刷技法により、蛍光
体からの発光色と補色の関係にある色の顔料等をフィル
ム素材上に印刷する方法である。この方法によって光吸
収層における光吸収部からの光透過部への濃度変化、す
なわち光透過率の変化が連続的になる。The method of forming the light absorbing layer in the present invention is to take a radiograph of a standard body shape person to be an imaging target site, for example, by shifting the focal position, and by repeating this multiple times,
Using the thing blurred until the edges of the fine parts and bones etc. appearing in the original radiograph disappear, as a master for photoengraving, for example, by a printing technique such as gravure printing, the emission color from the phosphor and This is a method of printing pigments and the like of complementary colors on a film material. According to this method, the change in density from the light absorbing portion to the light transmitting portion in the light absorbing layer, that is, the change in light transmittance becomes continuous.
また、本発明における光吸収層は、光吸収層を設けた
フィルムを保護膜として用いてもよいし、またこれを蛍
光体層内に埋め込んで使用してもよい。Further, as the light absorbing layer in the present invention, a film provided with the light absorbing layer may be used as a protective film, or may be used by embedding it in the phosphor layer.
（作用） 本発明の感度補償増感紙の製造方法において、光吸収
層を撮影対象部位となる標準的体型者の放射線写真のぼ
かしたものを写真製版用の原版として使用して形成して
いるので、光吸収層の光透過率を放射線写真そのものに
従い光吸収部と光透過部の境界において連続的に変化さ
せることができ、これによって撮影した写真上に筋状の
パターンが写ることを防止することができる。(Function) In the method for producing a sensitivity-compensating intensifying screen of the present invention, the light absorption layer is formed by using a blurred radiograph of a standard body person who is to be photographed as an original plate for photoengraving. Therefore, the light transmittance of the light absorbing layer can be continuously changed at the boundary between the light absorbing portion and the light transmitting portion according to the radiograph itself, thereby preventing a streak pattern from appearing on the photographed image. be able to.
（実施例） 次に本発明の一実施例について説明する 実施例 蛍光体としてタングステン酸カルシウムを使用して以
下の方法により胸部Ｘ線写真用の感度補償増感紙を製造
した。Example Next, an example of the present invention will be described. Example A sensitivity-compensating intensifying screen for chest X-ray photography was manufactured by using calcium tungstate as a phosphor by the following method.
まず、標準的体形者の胸部Ｘ線写真を使用して、これ
を焦点位置をずらして撮影する。次いでこの焦点位置を
ずらした写真を再度焦点位置をずらして撮影する。そし
て当初のＸ線写真に写っていた微細部や骨部辺縁が消え
ていることを確認して、これを写真製版用原版とする。
次にこの写真製版用原版を使用し、タングステン酸カル
シウムの発光を吸収する黄色顔料をグラビア印刷により
厚さ10μｍのポリエステルフィルムからなる保護膜上に
印刷し、光吸収層を形成した。First, a standard body figure chest X-ray is taken and shifted in focus. Next, the photograph whose focus position is shifted is photographed again with the focus position shifted. Then, it is confirmed that the fine part and the rim of the bone part appearing in the initial X-ray photograph have disappeared, and this is used as a photoengraving original plate.
Next, using this master plate for photoengraving, a yellow pigment for absorbing the emission of calcium tungstate was printed by gravure printing on a protective film made of a polyester film having a thickness of 10 μm to form a light absorbing layer.
次に、タングステン酸カルシウム20重量部とバインダ
としてポリビニルブチラール２重量部とを酢酸ブチル78
重量部に混合してスラリーとし、このスラリーを光吸収
層の形成されている保護膜の光吸収層と反対側に塗布
し、乾燥させて厚さ約100μｍの蛍光体層を形成した。Next, 20 parts by weight of calcium tungstate and 2 parts by weight of polyvinyl butyral as a binder were mixed with 78 parts of butyl acetate.
The slurry was mixed with parts by weight to form a slurry. The slurry was applied to the side of the protective film having the light absorbing layer opposite to the light absorbing layer, and dried to form a phosphor layer having a thickness of about 100 μm.
しかる後この蛍光体層の上に厚さ250μｍのポリエス
テルフィルムからなる支持体を貼着させて感度補償増感
紙を製造した。Thereafter, a support consisting of a polyester film having a thickness of 250 μm was adhered on the phosphor layer to produce a sensitivity compensation intensifying screen.
このようにして得た感度補償増感紙をＸ線フィルムと
重ねてカセッテに入れ、Ｘ線を照射して感度分布を調べ
たところ光吸収層を設けた部分は他の部分の約50％であ
り、感度補償増感紙として十分であることがわかった。The sensitivity-compensating intensifying screen thus obtained was placed on a cassette with the X-ray film superimposed thereon, and the sensitivity distribution was examined by irradiating with X-rays. As a result, the portion provided with the light absorbing layer was about 50% of the other portions. Yes, it was found to be sufficient as a sensitivity compensation intensifying screen.
またこの感度補償増感紙を使用して、実際に胸部のＸ
線写真を撮影したところ、診断の障害となるような筋状
パターンのない良好なものであった。Also, by using this sensitivity compensation intensifying screen, X
When the radiograph was taken, it was good without a streak pattern that would interfere with diagnosis.
なお、この実施例では胸部Ｘ線写真について説明した
が、本発明はこれに限定されるものではなく、頭部のよ
うな他の部位の診断用のＸ線撮影にも使用することがで
きる。In this embodiment, a chest X-ray was described, but the present invention is not limited to this, and the present invention can be used for diagnostic X-ray imaging of other parts such as the head.
［発明の効果］ 以上説明したように本発明の製造方法による感度補償
増感紙によれば、光吸収層の光透過率を光吸収部と光透
過部の境界において連続的に変化させることができるの
で、撮影した放射線写真に光吸収層の濃度変化による境
界線が筋状パターンとして写ることがなく感度補償を行
うことができ、これによって診断時に支障のない放射線
撮影を行うことができる。[Effect of the Invention] As described above, according to the sensitivity-compensating intensifying screen according to the manufacturing method of the present invention, the light transmittance of the light absorbing layer can be continuously changed at the boundary between the light absorbing portion and the light transmitting portion. As a result, a boundary line due to a change in the density of the light absorbing layer does not appear as a streak pattern in the taken radiograph, and sensitivity compensation can be performed. As a result, radiography without any trouble at the time of diagnosis can be performed.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 斉藤 昭久 横浜市磯子区新杉田町８ 株式会社東芝 横浜金属工場内 (72)発明者 沢田 武司 春日井市関田町１丁目64番地 (56)参考文献 特開 昭58−161900（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akihisa Saito 8 Shinsugita-cho, Isogo-ku, Yokohama-shi Toshiba Corporation Yokohama Metal Factory (72) Inventor Takeshi Sawada 1-64, Sekida-cho, Kasugai-shi (56) References JP 58-161900 (JP, A)
Claims (3)
体層と、この蛍光体層上に形成された保護膜と、前記蛍
光体層からの発光を吸収する光吸収層とから構成される
感度補償増感紙の製造方法において、 撮影対象部位となる人体の放射線写真のぼかしたものを
写真製版用原版として用いて、単層からなる前記光吸収
層を印刷技法により形成する工程を有することを特徴と
する感度補償増感紙の製造方法。1. A support comprising: a support; a phosphor layer provided on the support; a protective film formed on the phosphor layer; and a light absorbing layer absorbing light emitted from the phosphor layer. A method of manufacturing a sensitivity-compensating intensifying screen comprising forming a single-layer light-absorbing layer by a printing technique using a blurred radiograph of a human body to be an object to be photographed as a photomechanical master. A method for producing a sensitivity-compensating intensifying screen, comprising:
部の境界において連続的に変化させる特許請求の範囲第
１項記載の感度補償増感紙の製造方法。2. The method according to claim 1, wherein the light transmittance of the light absorbing layer is continuously changed at a boundary between the light absorbing portion and the light transmitting portion.
形成する特許請求の範囲第１項または第２項記載の感度
補償増感紙の製造方法。3. The method of claim 1, wherein the light absorbing layer is formed on the protective film or in the phosphor layer.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62018986A JP2614219B2 (en) | 1987-01-29 | 1987-01-29 | Manufacturing method of sensitivity compensation intensifying screen |
| US07/148,958 US4982098A (en) | 1987-01-29 | 1988-01-27 | Speed compensated intensifying screen for radiography |
| KR1019880000786A KR910007464B1 (en) | 1987-01-29 | 1988-01-29 | Speed compensated intensifying screen for radio graphy |
| DE8888300801T DE3872533T2 (en) | 1987-01-29 | 1988-01-29 | RADIOGRAPHIC REINFORCEMENT SCREEN WITH COMPENSATED SPEED. |
| EP88300801A EP0277041B1 (en) | 1987-01-29 | 1988-01-29 | Speed compensated intensifying screen for radiography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62018986A JP2614219B2 (en) | 1987-01-29 | 1987-01-29 | Manufacturing method of sensitivity compensation intensifying screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63186200A JPS63186200A (en) | 1988-08-01 |
| JP2614219B2 true JP2614219B2 (en) | 1997-05-28 |
Family
ID=11986909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62018986A Expired - Lifetime JP2614219B2 (en) | 1987-01-29 | 1987-01-29 | Manufacturing method of sensitivity compensation intensifying screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2614219B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58161900A (en) * | 1982-03-19 | 1983-09-26 | キヤノン株式会社 | Fluorescence screen with sensitivity change and its manufacture |
-
1987
- 1987-01-29 JP JP62018986A patent/JP2614219B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63186200A (en) | 1988-08-01 |
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