JPS58121874A - X-ray image converter - Google Patents
X-ray image converterInfo
- Publication number
- JPS58121874A JPS58121874A JP57234981A JP23498182A JPS58121874A JP S58121874 A JPS58121874 A JP S58121874A JP 57234981 A JP57234981 A JP 57234981A JP 23498182 A JP23498182 A JP 23498182A JP S58121874 A JPS58121874 A JP S58121874A
- Authority
- JP
- Japan
- Prior art keywords
- light
- ray image
- image converter
- ray
- semiconductor layer
- 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
- 239000004065 semiconductor Substances 0.000 claims description 14
- 230000005284 excitation Effects 0.000 claims description 4
- 108010076504 Protein Sorting Signals Proteins 0.000 claims description 2
- 238000000034 method Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- RBRFDGCVTRKUEW-UHFFFAOYSA-L barium(2+);chloride;fluoride Chemical compound [F-].[Cl-].[Ba+2] RBRFDGCVTRKUEW-UHFFFAOYSA-L 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 150000003346 selenoethers Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/16—X-ray, infrared, or ultraviolet ray processes
- G03C5/17—X-ray, infrared, or ultraviolet ray processes using screens to intensify X-ray images
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K4/00—Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Conversion Of X-Rays Into Visible Images (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Light Receiving Elements (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は走査励起装置と走査によって得られた画像信
号列を可視1′lに変換する装置を備えるX線イメージ
コンバータに関するものである。この種のX線映像再生
装置は例えば欧洲特許出I頓公15Ji@Qo225a
a 号により公知である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray image converter equipped with a scanning excitation device and a device for converting an image signal sequence obtained by scanning into visible 1'l. This type of X-ray image reproducing device is, for example, a patent issued in Europe 15Ji@Qo225a.
It is known by No. a.
主としてX線量だけによ−って限定される高いコントラ
ストと空間分解能を持つ二次元X線1象は主に次の二つ
の方法によって作られる。その−っはコンピュータを使
用するX線撮影法であり、他は例えば燐光発光体に蓄積
されているX線分布像を励起発光させる5法である。最
初の方法では刊象物を扇形に拡がったビームで照射し、
発生信号を線状の検出器アレfに記録する。そのために
は約500乃至1000個の検出器と増幅器を含む高価
な装置が必要となる。しかも検査対象区域の走青時間は
約10秒で通常の撮影時間(ミリ秒程度)に比べて著し
く長い。更に長い走査時間のためX線管球の9荷が著し
く高くなる外対象物の動きにより映像にぼけを生ずるこ
とがある。その上1酵当りの周期数で表わされる空間分
解能は05乃至] P e r/、tmであり通常撮影
の4乃至8per/8#lに比べて低い。A two-dimensional X-ray image with high contrast and spatial resolution, which is limited primarily by the X-ray dose, is produced primarily by the following two methods. One of these is an X-ray photography method that uses a computer, and the other methods include, for example, five methods in which an X-ray distribution image stored in a phosphorescent material is excited to emit light. In the first method, the object is irradiated with a fan-shaped beam;
The generated signal is recorded on a linear detector array f. This requires expensive equipment containing about 500 to 1000 detectors and amplifiers. Moreover, the scanning time of the area to be inspected is about 10 seconds, which is significantly longer than the normal imaging time (about milliseconds). Furthermore, due to the long scanning time, the 9 load of the X-ray tube becomes significantly higher, and the movement of the extraneous object may cause blurring of the image. Moreover, the spatial resolution expressed in terms of the number of cycles per fermentation is 0.5 to 0.05 per/, tm, which is lower than 4 to 8 per/8 #l for normal imaging.
発光スクリーンを励起発光させる第二の方法では発光ス
クリーンとそれに接続された記録系の間で電子増倍管に
基く大きな光損失が発生する。従って発光スクリーンと
増倍管を固定して走査ビームを動かす鳴合憎倍管の入力
端において吸収される。X腺量子1ヶ当りの光量子の数
が少なくなる。In the second method of exciting the luminescent screen to emit light, a large optical loss occurs between the luminescent screen and the recording system connected thereto due to the electron multiplier tube. Therefore, it is absorbed at the input end of the intensifier tube, which fixes the luminescent screen and the intensifier tube and moves the scanning beam. The number of photons per X gland quantum decreases.
光電子増倍管を発光スクリーンに近づけると発光スクリ
ーン又は電子増倍管な動かさない限り発光素子と電子増
倍管の間の立体角が場所によって大1
きく変fヒし信号が不鮮明になる。この場合発光ス
クリーンを動かす方が有効であろう。そのためには発光
スクリーンを例えばドラムに巻きつけこのドラムを回転
させると同時に軸方向に動かす。このような構成として
も信号の相当な部分が失われ、しかも機械的の離間が追
加される。When the photomultiplier tube is brought close to the luminescent screen, the solid angle between the luminescent element and the electron multiplier tube will increase depending on the location unless the luminescent screen or electron multiplier tube is moved.
The signal becomes unclear. In this case, it would be more effective to move the luminescent screen. To do this, the luminescent screen is wound around a drum, for example, and this drum is rotated and simultaneously moved in the axial direction. Even with this configuration, a significant portion of the signal is lost and additional mechanical separation is added.
この発明の目的は冒頭に挙げたX線イメージコンバータ
を改良して簡単な構成により高い信号収率が達成される
ようにすることである。この目的は特許請求の範囲第1
項に特徴として挙げた構造を採用することによって達成
される。この発明の有利な実施形・態は特許請求の範囲
第2項以下に示されている。The object of the invention is to improve the X-ray image converter mentioned at the outset so that a high signal yield can be achieved with a simple construction. This purpose is the first claim.
This is achieved by adopting the structure listed as the feature in section 2. Advantageous embodiments of the invention are indicated in the following claims.
X線透過性の電極とその上に設けられたX線励起発光層
(X線照射による光電子を保有する層)とその発生光に
感応する光伝導半導体層とこの層に続く電極から構成さ
れ、少くとも一方の電極と場合によってそれに続く半導
体層が発光層励起光に対して透明である装置を使用すれ
ば半導体層が直接発光層に接しているから受光装置と発
光層の間の間隙で放出光の損失が起ることはない。しか
もこの装置は単純に層を重ね合せることによって作られ
るから製作が簡単である。蓄積層材料には例えばEuで
活性化したフッ化塩化バリウム(BaFCI :Eu
)が使用される。光伝導半導体は一群の打機半導体中か
ら選ぶことができる。亜鉛およびヒ素の酸化物、硫化物
およびセレン化物も使用され、シリコンとヒ化ガリウム
も使用可能である。蓄積層厚さは充分なXSの転換を行
なうため100μmの少数倍程度が必要であるが半導体
層は光を吸収するだけでよいから10乃至20μ島の厚
さでよい。It consists of an X-ray transparent electrode, an X-ray excited luminescent layer (a layer that retains photoelectrons generated by X-ray irradiation) provided thereon, a photoconductive semiconductor layer that is sensitive to the generated light, and an electrode following this layer. If you use a device in which at least one electrode and possibly the semiconductor layer following it are transparent to the light emitting layer excitation light, the semiconductor layer will be in direct contact with the light emitting layer, so the light will be emitted in the gap between the light receiving device and the light emitting layer. No loss of light occurs. Moreover, this device is easy to manufacture since it is made by simply superposing layers. The storage layer material is, for example, barium fluoride chloride (BaFCI:Eu) activated with Eu.
) is used. The photoconductive semiconductor can be selected from a group of perforated semiconductors. Oxides, sulfides and selenides of zinc and arsenic are also used, and silicon and gallium arsenide can also be used. The thickness of the storage layer needs to be a few multiples of 100 μm in order to achieve sufficient XS conversion, but since the semiconductor layer only needs to absorb light, the thickness may be 10 to 20 μm.
発光層に蓄積されているX41像を再生する略;は発光
層と赤外線透過性の平板形光伝導半導体の組合せを使用
する。この組合せは例えば発光物質を結合剤と共に光伝
導体上に沈降させて作ることができる。この組合せ体に
XiI像を蓄積した後レーザー光ビームで走査し、それ
によって作られた画像信号列を電極から取り出す。この
信号列の可視化は公知のXWテレビジョン装置によって
実施される。To reproduce the X41 image stored in the light emitting layer, a combination of the light emitting layer and an infrared transparent flat photoconductive semiconductor is used. This combination can be made, for example, by precipitating the luminescent material together with a binder onto the photoconductor. After accumulating a XiI image on this combination, it is scanned with a laser beam, and the resulting image signal train is taken out from the electrodes. Visualization of this signal train is performed by a known XW television device.
発光励起にはレーザー光走査式のもの以外にも適当な発
光ダイオードアレイを使用してその発光ダイオードを順
次に走査する形式のものを使用することができる。光伝
導半導体層の容量が大きく追加雑音が発生する場合には
その上の透明電極を例えば平行帯形に分割することがで
きる。In addition to the laser beam scanning type, a type in which an appropriate light emitting diode array is used and the light emitting diodes are sequentially scanned can be used for light emission excitation. If the photoconductive semiconductor layer has a large capacitance and causes additional noise, the transparent electrode above it can be divided, for example into parallel strips.
図面に示した実施例についてこの発明を更に詳細に説明
する。The invention will be explained in more detail with reference to the embodiments shown in the drawings.
第1図において1はX線源でありX線管球の形で示され
ている。このX線源から出たX線ビーム2は、り者3を
透過して撮影層4に当る。この撮影層はX線透過性の支
持板5とその上につけられたEu活性化フッ化塩化バリ
ウム(BaF、C1:Eu)層6(厚さ100μ鶏の少
数倍程度)と半導体層7から構成され両側に光透過性の
電極8と9が設けられている。電極9はある間隔を保っ
てレーザ〒光ビーム走査装置10に対向している。電極
8.9には導線11 a、 ’1 l bが接続され、
これらの導線と抵抗12を通して直流電源13に結ば几
ティる。導線1xa、xxbは更にテレビジョン再生装
置15の増幅器14に接続される。In FIG. 1, 1 is an X-ray source, which is shown in the form of an X-ray tube. The X-ray beam 2 emitted from this X-ray source passes through the receiver 3 and hits the imaging layer 4 . This imaging layer is composed of an X-ray transparent support plate 5, an Eu-activated barium fluoride chloride (BaF, C1:Eu) layer 6 (thickness about 100 μm thick) and a semiconductor layer 7 attached thereon. Light-transmissive electrodes 8 and 9 are provided on both sides. The electrodes 9 face the laser light beam scanning device 10 with a certain spacing therebetween. Conductive wires 11 a and '1 l b are connected to the electrode 8.9,
These conductors are connected to a DC power source 13 through a resistor 12. The conductors 1xa, xxb are further connected to an amplifier 14 of a television reproduction device 15.
K線源1のX線ビーム2は1者3を透過し燐光層6には
透視像に対応するエネルギー分布像が蓄積さ几る。導線
:tlaとllbを通して電源13の電圧が印加される
と光源〕0から放出された光ビーム16が透明重態9を
通して導かれて半導体層7を定査し、層に蓄積されてい
名エネルギーを光の形で救出させる。この光はその強さ
、に応じて層フの電気伝導度を変化させるから印加電圧
によって電気信号が作られる。この電気信号は増幅器1
4を通してテレビジョン受像機に送られそのスクリーン
上に可視像を作る。テレビジョン装置17には輝度やコ
ン、トラスト等の調整手段が設けられているから投影画
像を特定の要求に適合させることができる。The X-ray beam 2 from the K-ray source 1 is transmitted through the phosphorescent layer 6, and an energy distribution image corresponding to the perspective image is accumulated in the phosphorescent layer 6. When the voltage of the power source 13 is applied through the conductors tla and llb, the light beam 16 emitted from the light source 0 is guided through the transparent heavy layer 9 to scan the semiconductor layer 7 and release the energy stored in the layer into the light. be rescued in the form of This light changes the electrical conductivity of the layer depending on its intensity, so an electrical signal is created depending on the applied voltage. This electrical signal is transmitted to amplifier 1
4 to a television receiver, creating a visible image on its screen. Since the television device 17 is provided with adjustment means for brightness, contrast, trust, etc., the projected image can be adapted to specific requirements.
第2図には走査光源lOの代りに発光ダイオード・アレ
・(20を使用する実施例が示さ几ている。FIG. 2 shows an embodiment in which a light emitting diode array (20) is used in place of the scanning light source IO.
このアレイの各発光ダイオード21は導線系22を通し
て制御装置23によって制御され、順次に発光するよう
になっている。その他の動作は第1図の実施例のものと
一致する。Each light emitting diode 21 of this array is controlled by a control device 23 through a conductor system 22 so that it sequentially emits light. Other operations correspond to those of the embodiment of FIG.
第1図と第2図はそれぞれこの発明の互に異る実施例を
示す。
1・・・X線源、 5・・・支持板、 6・・・燐光層
、 マ・・・半導体層、 8および9・・、透明型−
極、 10・・・走査光ビーム装置、 20・・
・発光ダイオード・アレイ。1 and 2 each show a different embodiment of the invention. DESCRIPTION OF SYMBOLS 1... X-ray source, 5... Support plate, 6... Phosphorescent layer, Ma... Semiconductor layer, 8 and 9... Transparent type -
pole, 10... scanning light beam device, 20...
- Light emitting diode array.
Claims (1)
層ヒに置かれていること、この光伝導半導体j禰が二つ
の電極の間にあつ゛C発光スクリーンを含む成層構造に
は少くとも一方の側からFl ei #I 起尤の)′
1入りが可能であることを特徴県紮醜起装置と走査によ
って得られた画像信号列を可視像に変換する装置を備え
るX線イメージコンバータ。 2)発光−樽に接する電極が走査光に対して透明でちる
ことを特徴とする特許請求の範囲第1J貞可己載のX線
イメージコンバータ。 3)光伝導半導体層とその外側に接す−る電極が走斤尤
に刊して透明であることを特徴とする特許請求の範囲第
1項記載のxiイメージコン く−タ。 4)励起尾発生装置の発光スクリーンを包含する成層構
造として発光ダイオード・アレ〜rが設けられているこ
とを特徴とする特許請求の範囲第1項記載のX線イメー
ジコンバータ。[Claims] ]) A light-emitting screen is placed on a photoconductive semiconductor layer which is sensitive to the emitted light, and this photoconductive semiconductor layer is placed between two electrodes. A stratified structure containing F ei #I originating from at least one side
1. An X-ray image converter equipped with an X-ray image converter and a device that converts an image signal sequence obtained by scanning into a visible image. 2) Light Emission - An X-ray image converter mounted on a self-mounted X-ray image converter, characterized in that the electrode in contact with the barrel is transparent to scanning light. 3) The xi image computer according to claim 1, wherein the photoconductive semiconductor layer and the electrode in contact with the outside thereof are substantially transparent. 4) The X-ray image converter according to claim 1, characterized in that a light emitting diode array is provided as a layered structure including a light emitting screen of the excitation tail generator.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19813151570 DE3151570A1 (en) | 1981-12-28 | 1981-12-28 | X-ray image converter |
DE31515703 | 1981-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58121874A true JPS58121874A (en) | 1983-07-20 |
Family
ID=6149845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57234981A Pending JPS58121874A (en) | 1981-12-28 | 1982-12-22 | X-ray image converter |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS58121874A (en) |
DE (1) | DE3151570A1 (en) |
FR (1) | FR2519179A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5913969A (en) * | 1982-07-16 | 1984-01-24 | Toshiba Corp | Two-dimensional radiation detector |
US4694171A (en) * | 1984-11-29 | 1987-09-15 | Fuji Photo Film Co., Ltd. | Electron microscope image focusing using instantaneous emission of stimulable phosphor sheet |
US4695725A (en) * | 1984-12-10 | 1987-09-22 | Fuji Photo Film Co., Ltd. | Method of detecting a focus defect of an electron microscope image |
US4700071A (en) * | 1985-01-16 | 1987-10-13 | Fuji Photo Film Co., Ltd. | Method of recording and reproducing an electron microscope image |
US4922103A (en) * | 1983-11-21 | 1990-05-01 | Fuji Photo Film Co., Ltd. | Radiation image read-out apparatus |
US6492655B2 (en) | 2000-04-05 | 2002-12-10 | Fuji Photo Film Co., Ltd. | Method and apparatus for reading image information |
US6818913B2 (en) | 2000-02-25 | 2004-11-16 | Fuji Photo Film Co., Ltd. | Method and apparatus for reading image information by use of stimulable phosphor, and solid-state image detector |
US7041999B2 (en) | 1999-03-24 | 2006-05-09 | Fuji Photo Film Co., Ltd. | Image read-out method and system, solid image sensor, and image detecting sheet |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60111571A (en) * | 1983-11-21 | 1985-06-18 | Fuji Photo Film Co Ltd | Radiation picture information reader |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2990473A (en) * | 1955-05-04 | 1961-06-27 | Research Corp | Method for recording, detecting and measuring radiation and for recording and recalling data |
US3597079A (en) * | 1968-02-28 | 1971-08-03 | Itek Corp | Image enhancement apparatus and method using a radiant surface which produces free holes and electrons upon excitement |
US3978335A (en) * | 1974-10-30 | 1976-08-31 | Eastman Kodak Company | Electrographic recording process |
US4763002A (en) * | 1979-03-22 | 1988-08-09 | University Of Texas System | Photon detector |
-
1981
- 1981-12-28 DE DE19813151570 patent/DE3151570A1/en not_active Withdrawn
-
1982
- 1982-12-15 FR FR8221037A patent/FR2519179A1/en not_active Withdrawn
- 1982-12-22 JP JP57234981A patent/JPS58121874A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5913969A (en) * | 1982-07-16 | 1984-01-24 | Toshiba Corp | Two-dimensional radiation detector |
US4922103A (en) * | 1983-11-21 | 1990-05-01 | Fuji Photo Film Co., Ltd. | Radiation image read-out apparatus |
US4694171A (en) * | 1984-11-29 | 1987-09-15 | Fuji Photo Film Co., Ltd. | Electron microscope image focusing using instantaneous emission of stimulable phosphor sheet |
US4695725A (en) * | 1984-12-10 | 1987-09-22 | Fuji Photo Film Co., Ltd. | Method of detecting a focus defect of an electron microscope image |
US4700071A (en) * | 1985-01-16 | 1987-10-13 | Fuji Photo Film Co., Ltd. | Method of recording and reproducing an electron microscope image |
US7041999B2 (en) | 1999-03-24 | 2006-05-09 | Fuji Photo Film Co., Ltd. | Image read-out method and system, solid image sensor, and image detecting sheet |
US7071482B2 (en) | 1999-03-24 | 2006-07-04 | Fuji Photo Film Co., Ltd. | Image read-out method and system, solid image sensor, and image detecting sheet |
US7211818B2 (en) | 1999-03-24 | 2007-05-01 | Fujifilm Corporation | Image read-out method and system, solid image sensor, and image detecting sheet |
US6818913B2 (en) | 2000-02-25 | 2004-11-16 | Fuji Photo Film Co., Ltd. | Method and apparatus for reading image information by use of stimulable phosphor, and solid-state image detector |
US6492655B2 (en) | 2000-04-05 | 2002-12-10 | Fuji Photo Film Co., Ltd. | Method and apparatus for reading image information |
Also Published As
Publication number | Publication date |
---|---|
FR2519179A1 (en) | 1983-07-01 |
DE3151570A1 (en) | 1983-07-07 |
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