JPH04161900A - X-ray image conversion sheet and digital x-ray imaging device - Google Patents
X-ray image conversion sheet and digital x-ray imaging deviceInfo
- Publication number
- JPH04161900A JPH04161900A JP28815290A JP28815290A JPH04161900A JP H04161900 A JPH04161900 A JP H04161900A JP 28815290 A JP28815290 A JP 28815290A JP 28815290 A JP28815290 A JP 28815290A JP H04161900 A JPH04161900 A JP H04161900A
- Authority
- JP
- Japan
- Prior art keywords
- image conversion
- ray
- conversion sheet
- light
- ray image
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 29
- 238000003384 imaging method Methods 0.000 title abstract description 9
- 230000005284 excitation Effects 0.000 claims abstract description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 27
- 239000003989 dielectric material Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 230000003287 optical effect Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000007747 plating Methods 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000004020 luminiscence type Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000006386 memory function Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005316 response function Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Landscapes
- Conversion Of X-Rays Into Visible Images (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
Ｘ線画像変換シートおよびデジタルＸ線が像装置に関し
、
感度及び分解能がともに高い反射層を有するＸ線画像変
換シートおよびＸ線画像装置を提供することを目的とし
、
輝尽蛍光体を分散状態で含有する蛍光体層を支持体に担
持させたＸ線画像変換シートの蛍光体層の支持体側片面
に、励起光波長において入射角４５°以下での光反射率
が５０％以上であり、かつ輝尽光波長における光反射率
が５０％以上である誘電体より構成される多層膜光反射
層を持つように構成する。[Detailed Description of the Invention] [Summary] The present invention relates to an X-ray image conversion sheet and a digital X-ray imaging device, and an object thereof is to provide an X-ray image conversion sheet and an X-ray imaging device that have a reflective layer that has both high sensitivity and resolution. In an X-ray image conversion sheet in which a support supports a phosphor layer containing a stimulable phosphor in a dispersed state, light reflection at an incident angle of 45° or less at an excitation light wavelength is applied to one side of the phosphor layer on the support side. It is configured to have a multilayer light reflecting layer made of a dielectric material having a light reflectance of 50% or more and a light reflectance of 50% or more at the wavelength of stimulated light.
本発明はＸ線画像変換シートおよびデジタルＸ線が像装
置に関する。The present invention relates to an X-ray image conversion sheet and a digital X-ray imaging device.
従来の医療用Ｘ線写真（スクリーンフィルム）に代わっ
て、輝尽性蛍光体を利用した新しいデジタルラジオグラ
フィー・システムの開発が進められ、利用され始めてい
る。In place of conventional medical X-ray photography (screen film), new digital radiography systems using stimulable phosphors are being developed and are beginning to be used.
そのシステムのセンサ部分に輝尽性蛍光体を塗布したイ
メージングプレートが用いる方法に関しては、基本的な
構成が米国特許第３，８５９゜５２７に詳しく述べられ
ている。The basic structure of the method using an imaging plate coated with a stimulable phosphor in the sensor portion of the system is detailed in US Pat. No. 3,859.527.
輝尽性蛍光体であるＢａＢｒｚ ：ＥｕはＸ線検出とメ
モリの両方の機能をもった蛍光体である。BaBrz:Eu, which is a stimulable phosphor, has both X-ray detection and memory functions.
Ｘ線または紫外線が照射されると、発光中心であるＥｕ
が励起され青色に発光する（フォトルミネセンス）。同
時に一部のＥｕ内の電子が励起され、色中心に捕獲され
る。これがメモリ機能である。次にその輝尽性蛍光体に
赤ないし赤外波長の光を照射すると、色中心に捕獲され
ていた電子が励起され、Ｅｕ軌道に戻る時青色発光する
。これが輝尽発光である。この輝尽発光強度はＸ線の強
度に比例する。この輝尽発光を光電子増倍管で電気信号
に変換し、この電気信号を画像処理してＸ線写真が得ら
れる。即ち画像変換シートの効率を高くすると被曝線量
も軽減できる。When X-rays or ultraviolet rays are irradiated, the luminescent center Eu
is excited and emits blue light (photoluminescence). At the same time, some electrons in Eu are excited and captured at the color center. This is the memory function. Next, when the stimulable phosphor is irradiated with light of red or infrared wavelengths, the electrons captured in the color center are excited, and when they return to the Eu orbit, they emit blue light. This is stimulated luminescence. This stimulated luminescence intensity is proportional to the X-ray intensity. This stimulated luminescence is converted into an electrical signal by a photomultiplier tube, and this electrical signal is image-processed to obtain an X-ray photograph. That is, by increasing the efficiency of the image conversion sheet, the exposure dose can also be reduced.
Ｘ線画像変換シートとして利用するデジタル画像処理装
置は、従来のＸＨフィルム（スクリーン・フィルム）に
比べてＸ線量が１／２〜１／２０であり、さらに、コン
トラストの良い画像が得られる。A digital image processing device used as an X-ray image conversion sheet has an X-ray dose of 1/2 to 1/20 compared to a conventional XH film (screen film), and can also obtain images with good contrast.
本発明は、この装置のセンサであるＸ線画像変換シート
の改良に関するものである。The present invention relates to an improvement of the X-ray image conversion sheet that is the sensor of this device.
古くは、プラスチック板上に輝尽性蛍光体を有機バイン
ダに分散させた塗膜を接着し、さらに、透明で薄いプラ
スチックフィルムを保護膜として塗膜に接着したＸ線画
像変換シートを使用していた。しかしながら、Ｘ線画像
変換シートの感度および分解能が悪いとＸ線量が増加し
、人体に対する被曝線量が増加するため、Ｘ線画像変換
シートの分解能の向上と感度の向上が要望されている。In the old days, an X-ray image conversion sheet was used, in which a coating film containing a stimulable phosphor dispersed in an organic binder was adhered to a plastic plate, and then a transparent thin plastic film was bonded to the coating film as a protective film. Ta. However, if the sensitivity and resolution of the X-ray image conversion sheet are poor, the amount of X-rays increases and the exposure dose to the human body increases, so there is a demand for improved resolution and sensitivity of the X-ray image conversion sheet.
このような要望に沿い、Ｘ線画像変換シートの感度を向
上させるために蛍光体層と支持体の間に反射層をつける
ことが提案されている。反射層には金属反射層を用いる
ことが特開昭５６−１１３９３号に提案され、また白色
顔料を用いることが特開昭５６−１２６００号に提案さ
れている。In response to such demands, it has been proposed to provide a reflective layer between the phosphor layer and the support in order to improve the sensitivity of the X-ray image conversion sheet. The use of a metal reflective layer as the reflective layer was proposed in JP-A-56-11393, and the use of a white pigment was proposed in JP-A-56-12600.
従来の金属膜では、蛍光体層中の粒子で散乱された励起
用のレーザがすべて金属反射膜から反射されてしまうた
め、レーザの照射スポットが大きくなり分解能が低下す
るという問題があった。With conventional metal films, all of the excitation laser beam scattered by particles in the phosphor layer is reflected from the metal reflective film, resulting in a problem in that the laser irradiation spot becomes large and the resolution decreases.
本発明は感度及び分解能がともに高い反射層を有するＸ
線画像変換シートおよびＸ線画像装置を提供することを
目的とする。The present invention has a reflective layer with high sensitivity and high resolution.
An object of the present invention is to provide a line image conversion sheet and an X-ray image device.
本発明に係るＸ線画像変換シートは、輝尽蛍光体を分散
状態で含有する蛍光体層を支持体に担持させたＸ線画像
変換シートの蛍光体層の支持体側片面に、励起光波長に
おいて入射角４５°以下での光反射率が５０％以上であ
り、かつ輝尽光波長における光反射率が５０％以上であ
る誘電体より構成される多層膜光反射層を持つことを特
徴とする。The X-ray image conversion sheet according to the present invention has an X-ray image conversion sheet in which a phosphor layer containing a dispersed stimulable phosphor is supported on a support. It is characterized by having a multilayer light reflecting layer made of a dielectric material having a light reflectance of 50% or more at an incident angle of 45° or less and a light reflectance of 50% or more at a stimulated light wavelength. .
上記した反射特性をもつ多層膜としては、真空蒸着もし
くはスパッタリング法で作製されるＭｇＦｇ 、ＺｎＳ
、Ｚｒ０ｔ 、ＳｉＯ等が好ましく使用されるが、これ
らに限定はされない、各層の厚さは１００〜１０，００
０人の範囲にあり、全体の厚さは１，０００−ｉｏ、ｏ
ｏｏ人の範囲にあることが好ましい。Multilayer films with the above-mentioned reflective properties include MgFg, ZnS, and MgFg produced by vacuum deposition or sputtering.
, Zr0t, SiO, etc. are preferably used, but are not limited to these. The thickness of each layer is 100 to 10,000.
0 people, with an overall thickness of 1,000-io, o
It is preferable that the number is in the range of oo people.
多層膜光反射層の励起光波長における光反射率が入射角
６０°以上で４０％以下であるとさらに良好な分解能を
得ることができる。かかる反射特性をもつ多層膜として
は、Ｍ ｇ Ｆ ＊ 、 Ｚ ｎ Ｓ等の材料を、各層
の厚さを１００〜５，０００人の範囲とし、全体の厚さ
を１００〜１０，０００人の範囲としたものを使用する
ことが好ましい。Even better resolution can be obtained when the light reflectance of the multilayer light-reflecting layer at the excitation light wavelength is 40% or less at an incident angle of 60° or more. A multilayer film with such reflective properties is made of materials such as MgF*, ZnS, etc., with each layer having a thickness in the range of 100 to 5,000 layers, and the total thickness in the range of 100 to 10,000 layers. It is preferable to use a range.
輝尽蛍光体は、アクリル樹脂、ポリエステル樹脂、セル
ロース樹脂等の樹脂をアセトン、トルエン、ＭＥＫ等の
溶剤で溶かしたものに分散させて成膜する。The photostimulated phosphor is formed into a film by dispersing a resin such as acrylic resin, polyester resin, or cellulose resin in a solvent such as acetone, toluene, or MEK.
輝尽蛍光体の膜上には必要により保護膜を被着すること
ができる。A protective film can be coated on the stimulable phosphor film if necessary.
上記したＸ線画像変換シートを、Ｘ線発生源。The above-mentioned X-ray image conversion sheet is used as an X-ray generation source.
シート保持器具、読み取り光学系等を備えたＸ線画像装
置（例えば、特願昭６３−１６８９１参照）に使用する
ことにより、鮮明な画像を少ないＸＩ！量で得ることが
できる。By using it in an X-ray imaging device equipped with a sheet holding device, reading optical system, etc. (for example, see Japanese Patent Application No. 16891/1983), clear images can be obtained with less XI! You can get it in quantity.
請求項１記載の発明においては、輝尽発光を利用するＸ
線画像変換シートの蛍光体層の片面に、輝尽光波長にお
ける光反射率が５０％以上である多層膜よりなる光反射
層を設け、蛍光体層を透過した励起用のレーザを反射す
るため、レーザのパワーを有効に利用でき輝尽発光効率
を高くできる。さらに分解能向上のためには、第５図に
示す蛍光体層２を透過した励起用のレーザのうち、広が
りが小さい部分のみを反射膜から反射できるように、入
射角度θ≦４５°の反射率が５０％以上として反射膜の
反射率に入射角度依存性を持たせることが有効である。In the invention according to claim 1, X using stimulated luminescence
A light reflecting layer made of a multilayer film with a light reflectance of 50% or more at the stimulated wavelength is provided on one side of the phosphor layer of the line image conversion sheet to reflect the excitation laser that has passed through the phosphor layer. , the laser power can be used effectively and the stimulated luminescence efficiency can be increased. Furthermore, in order to improve the resolution, the reflectance at the incident angle θ≦45° should be adjusted so that only the part with a small spread of the excitation laser transmitted through the phosphor layer 2 shown in FIG. 5 can be reflected from the reflective film. It is effective to make the reflectance of the reflective film depend on the angle of incidence by setting it to 50% or more.
なお、特開昭６２−１６９０９５号によると、３０°以
上の入射角度における励起波長における光反射率が６０
％以上である多層膜フィルタが示されており、このフィ
ルタの励起光反射特性は本発明のものと重複するが、前
者の従来例は蛍光体への励起光の入射角度依存性をもた
せるフィルタ技法に関し、本発明のように支持体側から
の反射角度依存性を利用するものではない。According to JP-A-62-169095, the light reflectance at the excitation wavelength at an incident angle of 30° or more is 60°.
% or more, and the excitation light reflection characteristics of this filter overlap with those of the present invention, but the former conventional example uses a filter technique that makes the excitation light incident angle dependent on the phosphor. Regarding this, unlike the present invention, the dependence of the reflection angle from the support side is not utilized.
請求項２記載の発明ではさらに広がりが小さい反射光の
みを反射膜から反射するように反射率角度依存性をもた
せている。In the invention described in claim 2, the reflectance is made to have angle dependence so that only the reflected light with a smaller spread is reflected from the reflective film.
請求項１または２記載のＸ線画像変換シートを使用する
Ｘ線画像装置（請求項３の発明）は、少ないＸＩ！！照
射量で分解能が高い画像を得ることを可能にする。An X-ray imaging apparatus (invention according to claim 3) using the X-ray image conversion sheet according to claim 1 or 2 can reduce XI! ! This makes it possible to obtain images with high resolution depending on the amount of irradiation.
以下、実施例により本発明を説明する。The present invention will be explained below with reference to Examples.
〔実施例］
支持体、誘電体多層光反射膜、蛍光体層、保護膜を第１
図の構成で積層し使用した。[Example] A support, a dielectric multilayer light-reflecting film, a phosphor layer, and a protective film are
They were laminated and used in the configuration shown in the figure.
図中１は保護膜、２は蛍光体層、３は支持体、４は多層
膜光反射層である。In the figure, 1 is a protective film, 2 is a phosphor layer, 3 is a support, and 4 is a multilayer light reflecting layer.
厚さ０．７ｍｍのコーニング社７０５９ガラス厚さ０．
７ｍｍのコーニング社７０５９ガラスよりなる支持体３
上に、多層膜光反射層４を真空蒸着によりＭｇ Ｆｔ
、 Ｓ ｉ ０２を、各層の厚さを５００〜２，５００
人、全体の厚さを約１０゜０００人に成膜して形成した
。使用した多層膜光反射層の反射率を第３図に示す。励
起波長である７８０〜８３０ｎｍおよび輝尽発光波長で
ある４１０ｎｍ付近の反射率は９０％以上と高い値が得
られた。Corning 7059 glass thickness 0.7mm.
Support 3 made of 7 mm Corning 7059 glass
On top, a multilayer light reflection layer 4 of MgFt is formed by vacuum evaporation.
, S i 02, the thickness of each layer is 500 to 2,500
The film was formed to a total thickness of approximately 10.000 mm. FIG. 3 shows the reflectance of the multilayer light-reflecting layer used. The reflectance near the excitation wavelength of 780 to 830 nm and the stimulated emission wavelength of 410 nm was as high as 90% or more.
多層膜光反射層４の上に、輝尽蛍光体、樹脂バインダ、
溶剤、可塑剤を含む蛍光体層を形成した。輝尽蛍光体と
しては、ＢａＢｒｚ ： Ｅｕ。On the multilayer light reflecting layer 4, a stimulable phosphor, a resin binder,
A phosphor layer containing a solvent and a plasticizer was formed. Examples of photostimulated phosphors include BaBrz:Eu.
ＢａＣｊ２ｘ ： Ｅｕ、ＢａＣＡＢｒ ： Ｅｕ等
を使用した。BaCj2x: Eu, BaCABr: Eu, etc. were used.
樹脂バインダはアクリル樹脂、溶剤はトルエンを使用し
た。可塑剤は、ジブチルフタレートを使用した。これら
の材料を重量比、１０００ （輝尽蛍光体）：６０（樹
脂バインダ）：３００（溶剤）＝６（可塑剤）で混合し
、ドクターブレード法で蛍光体層２を形成した。その後
溶剤を乾燥させ、蛍光体層２の上に厚さ０．３５〜０．
７ｍｍの７０５９ガラスによる保護膜１を接着した。Acrylic resin was used as the resin binder, and toluene was used as the solvent. Dibutyl phthalate was used as the plasticizer. These materials were mixed at a weight ratio of 1000 (photostimulated phosphor): 60 (resin binder): 300 (solvent) = 6 (plasticizer), and a phosphor layer 2 was formed by a doctor blade method. Thereafter, the solvent is dried, and a layer of 0.35 to 0.0 mm is coated on the phosphor layer 2.
A protective film 1 made of 7 mm 7059 glass was adhered.
この画像変換シートを使用し、励起波長での感度と分解
能を測定した。なお比較のため、反射膜を持たないもの
も作製し同様の測定を行った。Using this image conversion sheet, sensitivity and resolution at the excitation wavelength were measured. For comparison, a sample without a reflective film was also fabricated and the same measurements were conducted.
結果を表１に示す。The results are shown in Table 1.
表１・孟厘拳反射層９き８線画像変換′−トさらに、本
発明の上記実施例、ならびに反射膜なしの従来例及びＡ
１の反射膜付きの従来例につき分解能測定用チャートを
用いてレスポンス関数（ＭＴＦ）を測定した。その結果
を第３図及び第４図に示す。Table 1: 8-line image conversion with reflective layer
The response function (MTF) of the conventional example No. 1 with a reflective film was measured using a resolution measurement chart. The results are shown in FIGS. 3 and 4.
表１を見ると、多層膜光反射層を設けることにより、感
度が向上していることがわかる。Looking at Table 1, it can be seen that the sensitivity is improved by providing the multilayer light reflecting layer.
このことより、多層光反射層がＸ線画像変換シートおよ
びデジタルＸ線画像装置の感度向上に有効であることが
確認できる。This confirms that the multilayer light-reflecting layer is effective in improving the sensitivity of X-ray image conversion sheets and digital X-ray imaging devices.
さらに第３図、第４図から、本発明の分解能はアルミ反
射膜付きのものより良好であることが分かる。Further, from FIGS. 3 and 4, it can be seen that the resolution of the present invention is better than that of the device with an aluminum reflective film.
以上のように本発明のＸ線画像変換シートは感度及び分
解能ともに優れたものである。As described above, the X-ray image conversion sheet of the present invention has excellent sensitivity and resolution.
第１図は本発明一実施例のＸ線画像変換シートの断面図
、
第２図は誘電体多層光反射層の反射率（入射角０度）の
グラフ、
第３図および第４図は分解能グラフ、
第５図は本発明の反射膜の作用説明図である。Figure 1 is a cross-sectional view of an X-ray image conversion sheet according to an embodiment of the present invention, Figure 2 is a graph of the reflectance of the dielectric multilayer light-reflecting layer (incident angle of 0 degrees), Figures 3 and 4 are resolution The graph and FIG. 5 are explanatory views of the action of the reflective film of the present invention.
Claims (1)
に担持させたＸ線画像変換シートの蛍光体層の支持体側
片面に、励起光波長において入射角４５°以下での光反
射率が５０％以上であり、かつ輝尽光波長における光反
射率が５０％以上である誘電体より構成される多層膜光
反射層を持つことを特徴とするＸ線画像変換シート。 ２、前記多層膜光反射層の励起光波長における光反射率
が入射角６０°以上で４０％以下であることを特徴とす
る請求項１記載のＸ線画像変換シート。 ３、請求項１又は２記載のＸ線画像変換シートを使用し
たことを特徴とするデジタルＸ線画像装置。[Claims] 1. In an X-ray image conversion sheet in which a phosphor layer containing a dispersed stimulable phosphor is supported on a support, an incident angle of 45 at the excitation light wavelength is applied to one side of the phosphor layer on the support side. An X-ray image characterized by having a multilayer light-reflecting layer made of a dielectric material having a light reflectance of 50% or more at a wavelength of 50° or less and a light reflectance of 50% or more at a stimulated light wavelength. Conversion sheet. 2. The X-ray image conversion sheet according to claim 1, wherein the light reflectance of the multilayer light reflection layer at an excitation light wavelength is 40% or less at an incident angle of 60° or more. 3. A digital X-ray image device using the X-ray image conversion sheet according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28815290A JPH04161900A (en) | 1990-10-25 | 1990-10-25 | X-ray image conversion sheet and digital x-ray imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28815290A JPH04161900A (en) | 1990-10-25 | 1990-10-25 | X-ray image conversion sheet and digital x-ray imaging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04161900A true JPH04161900A (en) | 1992-06-05 |
Family
ID=17726479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28815290A Pending JPH04161900A (en) | 1990-10-25 | 1990-10-25 | X-ray image conversion sheet and digital x-ray imaging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04161900A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035799A (en) * | 2001-06-18 | 2003-02-07 | Eastman Kodak Co | Phosphorescent panel for radiograph |
| JP2003248088A (en) * | 2002-01-31 | 2003-09-05 | Eastman Kodak Co | Phosphor panel for radiation photography |
-
1990
- 1990-10-25 JP JP28815290A patent/JPH04161900A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003035799A (en) * | 2001-06-18 | 2003-02-07 | Eastman Kodak Co | Phosphorescent panel for radiograph |
| JP2003248088A (en) * | 2002-01-31 | 2003-09-05 | Eastman Kodak Co | Phosphor panel for radiation photography |
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