JPS62251738A - Radiographic image information recorder - Google Patents
Radiographic image information recorderInfo
- Publication number
- JPS62251738A JPS62251738A JP61094448A JP9444886A JPS62251738A JP S62251738 A JPS62251738 A JP S62251738A JP 61094448 A JP61094448 A JP 61094448A JP 9444886 A JP9444886 A JP 9444886A JP S62251738 A JPS62251738 A JP S62251738A
- Authority
- JP
- Japan
- Prior art keywords
- image
- rays
- ray
- radiation
- sheet
- 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
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 26
- 230000005855 radiation Effects 0.000 claims description 19
- 206010047571 Visual impairment Diseases 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 11
- 230000003287 optical effect Effects 0.000 abstract description 10
- 230000005284 excitation Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000695 excitation spectrum Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Measurement Of Radiation (AREA)
- Radiography Using Non-Light Waves (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、蓄積性蛍光膜からなる放射線画像記録装置に
係り、さらに詳しくは高精細放射線画像を得る以外に被
験体内組織又は造影剤の動きをモニターするに好適な放
射線画像情報記録装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a radiation image recording device comprising a stimulable fluorescent film. The present invention relates to a radiation image information recording device suitable for monitoring.
蓄積性蛍光体に放射線（Ｘ線・γ線・陽子線・中性子線
・α線・β線等）を照射すると、この放射線の持つエネ
ルギーの一部が蓄積・記録される。When a stimulable phosphor is irradiated with radiation (X-rays, gamma-rays, proton beams, neutron beams, alpha-rays, beta-rays, etc.), a portion of the energy of this radiation is stored and recorded.
この蛍光体に励起光を照射すると蓄積されたエネルギー
の一部が蛍光として取り出され、入射放線のエネルギー
量に関する情報が得られる。When this phosphor is irradiated with excitation light, part of the accumulated energy is extracted as fluorescence, and information regarding the energy amount of the incident radiation can be obtained.
近年、この蓄積性蛍光体を用いたＸ線撮影装置が提案さ
れている。すなわち、該蛍光体に被験体透過後のＸ線情
報を記録し、レーザ光走査によりｘＭＡエネルギー情報
を読み出し、Ｘ線画像を得る方法である（米国特許第３
８４＋！１５２７号、特開昭５５−１２１４５号）。In recent years, X-ray imaging devices using this stimulable phosphor have been proposed. That is, this is a method of recording X-ray information after passing through a subject on the phosphor, reading xMA energy information by laser beam scanning, and obtaining an X-ray image (U.S. Patent No. 3).
84+! No. 1527, JP-A-55-12145).
上記、放射線画像情報記録再生方法において、蓄積性蛍
光体プレートはＸ線フィルムのような最終画像を与える
ものではなく一時的に画像情報を保持・記録するため、
繰返し使用されることが一般的である。しかし、このプ
レートを再使用する場合、搬送機構が必要となり、詰ま
り・引掛かり等のトラブルなく搬送することは極めて困
難である６さらに、搬送中の擦り傷や端部の欠落等の機
械的損傷も大きな問題となる。また、複数枚のプレー１
−を再使用し、あるプレートは貯蔵し、あるプレートは
優先的に画像情報を読み取る操作を行うと、使用順序が
不同となり、新旧プレートが混在し再生画像の画質が不
均質となる問題がある。In the above radiation image information recording and reproducing method, the stimulable phosphor plate does not provide a final image like an X-ray film, but temporarily holds and records image information;
Commonly used repeatedly. However, if this plate is to be reused, a transport mechanism is required, and it is extremely difficult to transport it without problems such as jamming or getting caught.6 Furthermore, mechanical damage such as scratches or missing edges during transport can occur. It becomes a big problem. Also, multiple play 1
- If you reuse some plates and perform operations such as storing some plates and reading image information on some plates preferentially, the order of use will be inconsistent, and old and new plates will coexist, resulting in uneven image quality of reproduced images. .
上記問題点を解決する方法として循環再使用可能な蓄積
性記録体からなる放射線画像記録装置が提案されている
。（特開昭５８−２００２６９）本方式は、再生画像を
均質化する効果はあるが、レーザ光で逐次的に蓄積デー
タを読み出すために、−画像全体を読み出すためには少
なくとも数１０秒を要し、被験体の動態計測を行うこと
ができないという問題があった・
〔発明の目的〕
本発明の目的は、無限軌道状の蓄積蛍光体シートの下部
に二次元光センサーを配置することにより、シートの機
械的損傷を無くし、均質な高精細放射線画像を得る以外
に、被験体の動的な動きをモニターするに好適な放射画
像情報記録装置を提供するこにある。As a method for solving the above-mentioned problems, a radiation image recording apparatus comprising a cyclically reusable storage medium has been proposed. (Japanese Unexamined Patent Publication No. 58-200269) Although this method has the effect of homogenizing the reproduced image, it requires at least several tens of seconds to read out the entire image because the stored data is read out sequentially using a laser beam. However, there was a problem that it was not possible to measure the dynamics of the subject. [Object of the Invention] The object of the present invention is to It is an object of the present invention to provide a radiation image information recording device suitable for eliminating mechanical damage to a sheet and obtaining a uniform high-definition radiation image, as well as for monitoring the dynamic movement of a subject.
蓄積性蛍光体は、放射線のエネルギーを蓄積・記録する
以外に、放射線照射中でもその放射線エネルギーに比例
した蛍光（瞬時光）を発生する。In addition to storing and recording radiation energy, stimulable phosphors generate fluorescence (instantaneous light) proportional to the radiation energy even during radiation irradiation.
したがって、Ｘ線の入射面と反対側に時間分解能の高い
二次元の光センサーを配置し、この瞬時光を検知・記録
することにより被験体の動態計測が可能となる。さらに
、高精細画像を所望する場合には、Ｘ線が照射された蓄
積蛍光体膜を移動し、Ｘ線が未照射の蓄積蛍光体膜に置
換し、Ｘ線撮影することにより得られる。蓄積性蛍光体
膜の置換は、無限軌道の蓄積蛍光体シートを用いること
により、蛍光体膜置換のための装置が簡便化され、さら
に蛍光体膜の機械的損傷を無くすることができる。Therefore, by arranging a two-dimensional optical sensor with high temporal resolution on the side opposite to the X-ray incident plane and detecting and recording this instantaneous light, it becomes possible to measure the dynamics of the subject. Furthermore, if a high-definition image is desired, it can be obtained by moving the storage phosphor film that has been irradiated with X-rays, replacing it with a storage phosphor film that has not been irradiated with X-rays, and performing X-ray photography. For replacing the stimulable phosphor film, by using an endless track storable phosphor sheet, the apparatus for replacing the phosphor film can be simplified, and furthermore, mechanical damage to the phosphor film can be eliminated.
以下、本発明の実施例を第１図により説明する。 Embodiments of the present invention will be described below with reference to FIG.
１は蓄積性蛍光体からなる無限軌道状のＸａ検出用シー
トである。蓄積蛍光体は入射Ｘ線エネルギーを効率よく
蓄積する輝尽蛍光体が使用される。1 is an endless track-shaped Xa detection sheet made of a stimulable phosphor. As the storage phosphor, a stimulable phosphor that efficiently stores incident X-ray energy is used.
輝尽蛍光体としては輝尽効率の高いＢａＦＢｒ ：Ｅｕ
”十が用いられる。また、輝尽蛍光体は透光性。BaFBr:Eu has high photostimulation efficiency as a photostimulable phosphor.
"10" is used.Also, the photostimulable phosphor is translucent.
可撓性および耐放射線性の樹脂で固化される。樹脂とし
てはポリエステル・ウレタン樹脂と酢酸セルロースが用
いられる。２はＸ線検出用シート１を移動するためのロ
ーラで、被験体３の動態計測の際には停止している。ｘ
ｌｌＡ管４からのＸ線を照射することにより、被験体３
Ｆ部のＸ線検出用シート１が瞬時光を発生する。この瞬
時光は被験体３の内部構造を反映しており、時間分解能
が高い二次元光センサ−５で計測することにより、被験
体の動態計測が行える。高精細画像を所望する場合には
、Ｘａ管４からのＸ線を遮断した後、ローラ２でＸ線検
出用シート１を移動し、新しい面が被験体３の下部にく
るようにした後、ローラ２を停止し、Ｘ線を照射する。Hardened with flexible and radiation-resistant resin. Polyester urethane resin and cellulose acetate are used as the resin. 2 is a roller for moving the X-ray detection sheet 1, and is stopped when measuring the dynamic state of the subject 3. x
By irradiating the X-rays from the llA tube 4, the subject 3
The X-ray detection sheet 1 in section F generates instantaneous light. This instantaneous light reflects the internal structure of the subject 3, and by measuring it with a two-dimensional optical sensor 5 with high temporal resolution, the dynamics of the subject can be measured. If a high-definition image is desired, after blocking the X-rays from the Xa tube 4, move the X-ray detection sheet 1 with the roller 2 so that the new surface is below the subject 3, and then The roller 2 is stopped and X-rays are irradiated.
上記操作を繰返すことにより、複数枚の高精細Ｘ線潜像
が得られる。この潜像の読み出し、以下の手順で行われ
る。励起光源６でｘａ検出用シート１中の蓄積性蛍光体
を励起する。励起により発生する輝尽蛍光はライトガイ
ド８を通じて光電変換素子１０に導かれる。ライトガイ
ド８と光電変換素子１０のあいだには、励起光を除き輝
尽蛍光だけを透過させる光学フィルター９が配置されて
いる。７は、レーザ光を走査する九のミラーで、このミ
ラー７とローラ２を連動させることにより二次元画像デ
ータをタイムシリアルデータとして得ることができる。By repeating the above operations, a plurality of high-definition X-ray latent images can be obtained. This latent image is read out in the following steps. The stimulable phosphor in the xa detection sheet 1 is excited by the excitation light source 6. Stimulated fluorescence generated by excitation is guided to the photoelectric conversion element 10 through the light guide 8. An optical filter 9 is arranged between the light guide 8 and the photoelectric conversion element 10, which excludes excitation light and transmits only stimulated fluorescence. Reference numeral 7 denotes a mirror 9 that scans a laser beam, and by interlocking this mirror 7 and the roller 2, two-dimensional image data can be obtained as time-serial data.
ｘｍ潜像読み取り後の残像は、消去用光源１１を用いて
消去する。励起光源６としては波長６３３ｎｍのＨｅ
−Ｎ ｅレーザが用いられ、光電変換素子１０としては
検出感度が高くかつ増幅作用のある光電子増倍管が用い
られる。The afterimage after reading the xm latent image is erased using the erasing light source 11. The excitation light source 6 is He with a wavelength of 633 nm.
-Ne laser is used, and as the photoelectric conversion element 10, a photomultiplier tube with high detection sensitivity and amplification effect is used.
さらに、光電変換素子１０として光電子増倍管を用いた
場合、熱雑音に伴う暗電流が雑音成分となるため、冷却
装置を付加するとさらに良好なＳ／Ｎが得られる。Furthermore, when a photomultiplier tube is used as the photoelectric conversion element 10, dark current accompanying thermal noise becomes a noise component, so adding a cooling device can provide an even better S/N ratio.
第２図は、二次元光センサーの一例を示す。Ｘ線管１４
からＸ線が被験体１３に照射され、被験体１３透過後の
Ｘ線により、Ｘ線検出用シール１１が蛍光を発する。こ
の蛍光像を光学系１５で光Ｉ、Ｉ、１６受光面に結像し
、光Ｔ、Ｉ、１６で増幅の後、さらに光学系１７で撮像
素子１８の受光面に結像する。撮像素子１８出力により
、二次元画像をタイムシリアルデータとして得る。撮像
素子は撮像管やＣＯＤのような時間分解能が高い素子の
使用が可能なため、動画像が得られ、被検体１３の動態
計測が行える。FIG. 2 shows an example of a two-dimensional optical sensor. X-ray tube 14
The subject 13 is irradiated with X-rays, and the X-rays that have passed through the subject 13 cause the X-ray detection seal 11 to emit fluorescence. This fluorescent image is formed on the light receiving surface of light I, I, 16 by the optical system 15, amplified by the light T, I, 16, and then further imaged by the optical system 17 on the light receiving surface of the image pickup element 18. A two-dimensional image is obtained as time serial data by the output of the image sensor 18. As the image sensor, an element with high time resolution such as an image sensor tube or COD can be used, so a moving image can be obtained and the dynamic state of the subject 13 can be measured.
第３図は、二次元光センサーの別の実施例を示す９Ｘ線
検出用シートからの蛍光は凹面鏡２５で集束され、撮像
素子２８受光面上に結像され、タイムシリアルデータと
して画像情報が得られる。FIG. 3 shows another embodiment of a two-dimensional optical sensor. 9 Fluorescence from an X-ray detection sheet is focused by a concave mirror 25 and formed into an image on the light receiving surface of an image sensor 28 to obtain image information as time serial data. It will be done.
本発明における蓄積蛍光体としてはＢａＦＢｒ ；Ｅｕ
”十で代表される希土類元素付活アルカリ土類金属フル
オロハライド蛍光体以外に、 ＬｎＯＸ； ｘ Ａ（但
し、ＬｎはＬａ、Ｙ、ＧｄおよびＬｕのうちの少なくと
も１つ、ＡはＣｅおよびＴｂのうちの少なくとも１つ、
ＸはＯ＜ ｘ ＜ ０ 、１である）。As the storage phosphor in the present invention, BaFBr;Eu
In addition to rare earth element-activated alkaline earth metal fluorohalide phosphors represented by 10, LnOX; at least one of them,
X is O < x < 0, 1).
Ｂａ０−ｘＡＱｘ、Ｏｎ： Ｅｕ （但し、０．８≦Ｘ
≦１．０）およびＭＯ・ｘＳｊＯ８二Ａ（但し、ＭはＭ
ｇ 、 Ｃａ 。Ba0-xAQx, On: Eu (however, 0.8≦X
≦1.0) and MO・xSjO82A (where M is M
g, Ca.
Ｓｒ、Ｚｎ、ＣｄおよびＢａのうちの少なくとも１つ、
ＡはＣｅ ｇ Ｔ ｂ ＨＥ ｕ ＨＴ ｒｎ ＋ Ｐ
ｂ 、Ｔ Ｑ 。at least one of Sr, Zn, Cd and Ba;
A is Ce g T b HE u HT rn + P
b, TQ.
ＢｉおよびＭ、 ｕのうちの少なくとも］つ、又は０．
５≦Ｘ≦２．５である。）なども使用できる。at least one of Bi and M, u, or 0.
5≦X≦2.5. ) can also be used.
また、蓄積性蛍光体の励起光としては指向性が良く、か
つ高輝度であるレーザ光を用いられる。Further, as excitation light for the stimulable phosphor, a laser beam having good directivity and high brightness can be used.
このレーザ光源は、輝尽蛍光との分離を可能としなけれ
ばならないため、輝尽蛍光の波長および輝尽蛍光体の励
起スペクトルを考慮して決定され、５００〜１，１１０
０ｎ の光を放出するもの、たとえばＨｅ −Ｎ ｅレ
ーザ（６３３ｎｍ）、Ｋｒレーザ（６４７ｎｍ）、半導
体レーザ、またはＴＡＧレーザ（１，０６４ｎｍ）等か
ら選ばれる。This laser light source must be able to separate from the stimulated fluorescence, so it is determined by taking into account the wavelength of the stimulated fluorescence and the excitation spectrum of the stimulated phosphor.
The laser is selected from those that emit 0n light, such as a He-Ne laser (633 nm), a Kr laser (647 nm), a semiconductor laser, or a TAG laser (1,064 nm).
本発明によれば、ｘｖＡ像情報を記録・保持する蓄積蛍
光体からの瞬時光を利用し、動態計測を可能とする。さ
らに、蓄積蛍光体膜を置換することにより従来の高精細
Ｘ線像を得ることも可能となる。また、無限軌道状の蓄
積蛍光体シートを用いることにより、シート搬送機構が
単純となり、シートの機械的損傷を無くすることができ
る。According to the present invention, dynamic measurement is possible using instantaneous light from a storage phosphor that records and retains xvA image information. Furthermore, by replacing the storage phosphor film, it is also possible to obtain conventional high-definition X-ray images. Further, by using a storage phosphor sheet in the form of an endless track, the sheet conveyance mechanism becomes simple and mechanical damage to the sheet can be eliminated.
第１図は、本発明装置の断面図、第２図は、本発明装置
の動態計測部の断面図、第３図は、本発明装置の動態計
測部の別の実施例を示す。
１．１１．２１・・・Ｘ線検出用シート、２・・・ロー
ラ、４．１４．２４・・・Ｘ線管、５・・・二次元光セ
ンサ−，１５，１７・・・光学レンズ系、１６・・・光
ＩＩ、１８゜第 ／ 固FIG. 1 is a cross-sectional view of the apparatus of the present invention, FIG. 2 is a cross-sectional view of the dynamic measuring section of the apparatus of the present invention, and FIG. 3 is a sectional view of another embodiment of the dynamic measuring section of the apparatus of the present invention. 1.11.21... X-ray detection sheet, 2... Roller, 4.14.24... X-ray tube, 5... Two-dimensional optical sensor, 15, 17... Optical lens System, 16...Light II, 18゜th/hard
Claims (1)
線画像情報記録装置において、前記放射線を蛍光に変換
するための無限軌道状の蓄積性蛍光体シートと、放射線
照射時に該蓄積性蛍光体シートから発する蛍光像を受光
記録する手段、該シートを移動する手段、さらに該シー
トに記録された放射線潜像を読み出す手段、読み取り後
の残像を消去する手段とを備えたことを特徴とする放射
線画像情報記録装置。1. A radiation image information recording device that accumulates and records radiation intensity distribution with a stimulable phosphor film, which includes an endless track-shaped stimulable phosphor sheet for converting the radiation into fluorescence, and the stimulable phosphor sheet during radiation irradiation. A radiation image characterized by comprising means for receiving and recording a fluorescent image emitted from the sheet, means for moving the sheet, means for reading out a radiation latent image recorded on the sheet, and means for erasing an afterimage after reading. Information recording device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61094448A JPS62251738A (en) | 1986-04-25 | 1986-04-25 | Radiographic image information recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61094448A JPS62251738A (en) | 1986-04-25 | 1986-04-25 | Radiographic image information recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62251738A true JPS62251738A (en) | 1987-11-02 |
Family
ID=14110540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61094448A Pending JPS62251738A (en) | 1986-04-25 | 1986-04-25 | Radiographic image information recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62251738A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007172612A (en) * | 2005-12-15 | 2007-07-05 | General Electric Co <Ge> | Computed radiography system and method of use |
| JP2008048405A (en) * | 1996-03-13 | 2008-02-28 | Canon Inc | Photoelectric conversion apparatus, x-ray image pickup apparatus, and system having the apparatus |
| US7643077B2 (en) | 1996-03-13 | 2010-01-05 | Canon Kabushiki Kaisha | Photoelectric conversion apparatus and photoelectric conversion system having the apparatus |
| JP2010263661A (en) * | 1996-03-13 | 2010-11-18 | Canon Inc | Photoelectric conversion apparatus, x-ray imaging apparatus, and system having the apparatuses |
-
1986
- 1986-04-25 JP JP61094448A patent/JPS62251738A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008048405A (en) * | 1996-03-13 | 2008-02-28 | Canon Inc | Photoelectric conversion apparatus, x-ray image pickup apparatus, and system having the apparatus |
| US7643077B2 (en) | 1996-03-13 | 2010-01-05 | Canon Kabushiki Kaisha | Photoelectric conversion apparatus and photoelectric conversion system having the apparatus |
| JP2010263661A (en) * | 1996-03-13 | 2010-11-18 | Canon Inc | Photoelectric conversion apparatus, x-ray imaging apparatus, and system having the apparatuses |
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| JP4654321B2 (en) * | 1996-03-13 | 2011-03-16 | キヤノン株式会社 | Photoelectric conversion apparatus, X-ray imaging apparatus, and system having the apparatus |
| US8179469B2 (en) | 1996-03-13 | 2012-05-15 | Canon Kabushiki Kaisha | Photoelectric conversion apparatus and photoelectric conversion system having the apparatus |
| US8488037B2 (en) | 1996-03-13 | 2013-07-16 | Canon Kabushiki Kaisha | Photoelectric conversion apparatus and photoelectric conversion system having the apparatus |
| JP2007172612A (en) * | 2005-12-15 | 2007-07-05 | General Electric Co <Ge> | Computed radiography system and method of use |
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