JPS60120346A - Method and device for recording and reading radiation image information - Google Patents
Method and device for recording and reading radiation image informationInfo
- Publication number
- JPS60120346A JPS60120346A JP58228163A JP22816383A JPS60120346A JP S60120346 A JPS60120346 A JP S60120346A JP 58228163 A JP58228163 A JP 58228163A JP 22816383 A JP22816383 A JP 22816383A JP S60120346 A JPS60120346 A JP S60120346A
- Authority
- JP
- Japan
- Prior art keywords
- image information
- irradiation field
- recording
- reading
- phosphor 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.)
- Granted
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 41
- 230000005284 excitation Effects 0.000 claims description 9
- 238000004020 luminiscence type Methods 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract description 13
- 230000006866 deterioration Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract 1
- 230000003321 amplification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
- H04N1/3872—Repositioning or masking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/2012—Measuring radiation intensity with scintillation detectors using stimulable phosphors, e.g. stimulable phosphor sheets
- G01T1/2016—Erasing of stimulable sheets, e.g. with light, heat or the like
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Conversion Of X-Rays Into Visible Images (AREA)
- Radiography Using Non-Light Waves (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は放射線画像情報を蓄積記録している蓄積性螢光
体シートに励起光を照射することにより、放射線画像情
報を輝尽発光せしめ、得られた輝尽発光光を光検出器に
よって光学的に読み取る放射線画像情報読取方法および
装置に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention causes radiation image information to be stimulated to emit light by irradiating excitation light to a stimulable phosphor sheet that stores and records radiation image information. The present invention relates to a radiation image information reading method and apparatus for optically reading the obtained stimulated luminescence light using a photodetector.
〈従来技術）
人体等の放射線画像情報を一旦蓄積性螢光体シートに記
録し、この螢光体シートをレーザ光等の励起光で走査し
て輝尽発光光を生ぜしめ、得られた輝尽発光光を光電的
に読み出して画像信号を得、この画像信号に基づき写真
感光材料等の記録材料、ＣＲＴ等に可視像として出力さ
せる放射線画像情報記録再生システムが知られている（
特開昭５５−１２４２９号、同５６−１１３９５号、同
５５−１６３４７２号、同 ５５−１１６３４０号等
）。(Prior art) Radiographic image information of a human body, etc. is once recorded on a stimulable phosphor sheet, and this phosphor sheet is scanned with excitation light such as a laser beam to generate stimulated luminescence light. A radiation image information recording and reproducing system is known that photoelectrically reads out the exhaustion light to obtain an image signal and outputs it as a visible image to a recording material such as a photographic light-sensitive material, a CRT, etc. based on this image signal (
JP-A-55-12429, JP-A No. 56-11395, JP-A No. 55-163472, JP-A No. 55-116340, etc.).
一方、Ｘ線撮影装置においては、被写体のＸ線照射範囲
を制御するために、Ｘ線源の近傍にコリメータ等の照射
野絞りが設けられることがある。On the other hand, in an X-ray imaging apparatus, an irradiation field diaphragm such as a collimator is sometimes provided near an X-ray source in order to control the X-ray irradiation range of a subject.
この照射野絞りは診断に関係のない部分にＸ線が照射さ
れるのを防ぐという医療診断上の人道的効果の他に、診
断もしくは観察をすべき領域の外に位置する被写体によ
って散乱された散乱Ｘ線が、診断もしくは観察をすべき
領域内に入って記録材料に記録され、この領域のＸ線画
像のコントラストや画質を低下させてしまうのを防止す
る作用をも果している。This irradiation field aperture not only has the humane effect of preventing X-rays from being irradiated to areas unrelated to diagnosis, but also prevents X-rays from being scattered by objects located outside the area to be diagnosed or observed. It also serves to prevent scattered X-rays from entering the region to be diagnosed or observed and being recorded on the recording material, thereby reducing the contrast and image quality of the X-ray image in this region.
このように照射野絞りを用いれば被写体の撮影したい領
域のみにＸ線が照射されるので上述のような画質の低下
は防止されるが、逆に照射野が記録材料の大きさよりも
狭く絞られた時には、照射野内の被写体によって散乱さ
れた散乱Ｘ線が照射野外の記録材料外縁部に記録され、
ノイズが形成されやすくなる。特に蓄積性螢光体シート
のようなラチチュードの広い記録材料を使用した場合に
は、この散乱Ｘ線に起因するノイズが従来のフィルム／
スクリーン系よりも著しく目立つようになり、最終画像
の周縁部の体裁が損われる。Using an irradiation field aperture in this way prevents the above-mentioned deterioration in image quality because the X-rays are irradiated only on the area of the subject that you want to photograph, but conversely, the irradiation field is narrowed down to be narrower than the size of the recording material. At times, scattered X-rays scattered by the object within the irradiation field are recorded on the outer edge of the recording material outside the irradiation field.
Noise is more likely to form. Particularly when recording materials with wide latitude such as stimulable phosphor sheets are used, the noise caused by this scattered X-ray is
It becomes noticeably more noticeable than the screen type, and the appearance of the peripheral area of the final image is impaired.
３−
この問題は照射野の大きさに一致する蓄積性螢光体シー
トを撮影毎に選択して用いれば発生しないが、このよう
な操作は煩わしく実用的で、ない。3- This problem would not occur if a stimulable phosphor sheet matching the size of the irradiation field was selected and used for each photograph, but such operations are cumbersome and impractical.
特に装置内に１種類の比較的大きなサイズの蓄積性螢光
体シートを組み込んで、あらゆる部位の撮影・読取を行
なうシステム（特願昭５７−８４４３６号参照）におい
ては蓄積性螢光体シートのサイズを撮影毎に変更するこ
とはできないので、上記の問題を別の手段によって解決
しなければならなかった。In particular, in a system that incorporates one kind of relatively large stimulable phosphor sheet in the device to photograph and read any body part (see Japanese Patent Application No. 84436/1983), the stimulable phosphor sheet is Since the size cannot be changed every time a photograph is taken, the above problem had to be solved by other means.
（発明の目的）
本発明の目的は、前記のような従来技術の欠点を解決し
、照射野外に散乱した散乱線によるノイズに影響されな
い優れた放射線画像情報読取方法と装置を提供すること
にある。(Object of the Invention) An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide an excellent radiation image information reading method and apparatus that is not affected by noise caused by scattered radiation scattered in the irradiation field. .
（発明の構成）
本発明による放射線画像情報記録読取方法は、画像情報
の読取領域を記録時の照射野内に絞ることを特徴とし、
本発明による放射線画像情報記録読取装置は記録時の照
射野に関する情報に基づいて、前記読取領域を前記照射
野内に絞る手段を設４−
けたことを特徴とする。(Structure of the Invention) The radiation image information recording and reading method according to the present invention is characterized in that the image information reading area is narrowed down within the irradiation field at the time of recording,
The radiation image information recording/reading apparatus according to the present invention is characterized in that it includes means for narrowing down the reading area within the irradiation field based on information regarding the irradiation field at the time of recording.
（発明の効果）
本発明の放射線画像情報記録読取方法および装置によれ
ば、照射野絞りを用いて画像情報を蓄積性螢光体シート
に記録したときに画像情報の読取領域が前記照射野内に
絞られるため、蓄積性螢光体シートの照射野外に記録さ
れた散乱線によるノイズ成分は読み取られることがなく
、優れた最終画像を得ることができるようになる。また
、読取領域が絞られることによって、読取時間の短縮も
しくは読取密度の増大が可能となる。更にこれらの効果
が奏される故に撮影毎に照射野の大きさに応じた蓄積性
螢光体シートを選択するという煩わしい操作が不要とな
る。したがって、特に装置内に１種類の比較的大きなサ
イズの蓄積性螢光体シートを組込んで撮影・読取を行な
うシステムにおいて、画質の大幅な向上が達成できる。(Effects of the Invention) According to the radiation image information recording and reading method and apparatus of the present invention, when image information is recorded on a stimulable phosphor sheet using an irradiation field aperture, the image information reading area is within the irradiation field. Since the light is narrowed down, noise components due to scattered radiation recorded outside the irradiation area of the stimulable phosphor sheet are not read out, making it possible to obtain an excellent final image. Furthermore, by narrowing down the reading area, it is possible to shorten the reading time or increase the reading density. Furthermore, since these effects are achieved, the troublesome operation of selecting a stimulable phosphor sheet according to the size of the irradiation field for each photographing is no longer necessary. Therefore, a significant improvement in image quality can be achieved, particularly in a system in which a relatively large stimulable phosphor sheet of one kind is incorporated into the device for photographing and reading.
（実施態様） 以下、図面に基づいて、本発明の詳細な説明する。(Embodiment) Hereinafter, the present invention will be described in detail based on the drawings.
システムを示す概略図である。FIG. 1 is a schematic diagram showing the system.
図面において、１は撮影部、４は読取部、５は再生記録
部、６は全体制御部をそれぞれ示している。In the drawings, 1 indicates a photographing section, 4 a reading section, 5 a reproduction/recording section, and 6 an overall control section.
撮影部１においては、Ｘ線源１０１から被写体１０２に
向けて照射されたＸ線はコリメータ等の照射野絞り １
１０によってその照射野が絞られ、被写体１０２を通過
した後、蓄積性螢光体シート １０３に吸収せしめられ
、蓄積性螢光体シート１０３中に被写体のＸ線画像情報
が蓄積記録される。照射野絞り１１０は照射野絞り制御
装置１１５によって調整され、蓄積性螢光体シート １
０３上には斜線で示した照射野１０３Ａが形成される。In the imaging unit 1, the X-rays irradiated from the X-ray source 101 toward the subject 102 are passed through an irradiation field aperture 1 such as a collimator.
10 narrows down the irradiation field, and after passing through the subject 102, it is absorbed by the stimulable phosphor sheet 103, and X-ray image information of the subject is accumulated and recorded in the stimulable phosphor sheet 103. The field aperture 110 is adjusted by a field aperture control device 115, and the stimulable phosphor sheet 1
03, an irradiation field 103A indicated by diagonal lines is formed.
また、照射野絞り制御装置１１５は照射野絞り １１０
の開口の大きさｄ、Ｘ線源１０１から照射野絞り１１０
と蓄積性螢光体シート１０３までのそれぞれの距離免お
よびＬ１更にＸ線を斜めから照射する場合にはＸ線源１
０１と蓄積性螢光体シート １０３のなす角度θ（より
詳しくはＸ線源１０１の焦点から鉛直方向に降した線と
、前記焦点と照射野絞りの開口の中心を結んだ線のなす
角度）についての各々の情報を全体制御装置６０４へ出
力する。ここで照射野絞り１１０の開口の「大きさ」と
は、絞りの開口が円形の場合は径、矩形の場合は辺もし
くは対角線の長さを表わすものである。全体制御装置６
０４は照射野絞り制御装置１１５から出力された情報に
基づいて照射野１０３Ａの大きさを計算する。ここで照
射野の大きさＤは、Ｘ線ｌ １０１を螢光体シートに対
して傾けないで撮影する場合は
Ｘ線源１０１を螢光体シート １０３に対して傾けて、
Ｘ線を斜めから照射する場合は
によって決定される。Further, the irradiation field aperture control device 115 is an irradiation field aperture control device 110.
The aperture size d is from the X-ray source 101 to the irradiation field aperture 110.
and the respective distances to the stimulable phosphor sheet 103 and L1. Furthermore, when irradiating X-rays from an oblique direction, the X-ray source 1
The angle θ between 01 and the stimulable phosphor sheet 103 (more specifically, the angle between a line vertically descending from the focus of the X-ray source 101 and a line connecting the focus and the center of the aperture of the irradiation field diaphragm) Each piece of information is output to the overall control device 604. Here, the "size" of the aperture of the irradiation field diaphragm 110 means the diameter if the aperture of the diaphragm is circular, and the length of the side or diagonal line if the aperture is rectangular. Overall control device 6
04 calculates the size of the irradiation field 103A based on the information output from the irradiation field aperture control device 115. Here, the size D of the irradiation field is determined by tilting the X-ray source 101 with respect to the phosphor sheet 103 when imaging without tilting the X-ray source 101 with respect to the phosphor sheet 103.
When X-rays are irradiated obliquely, it is determined by .
また、この照射野１０３Ａの大きさＤの計算は照 ７−
射野絞り制御装置１１５において行ない、その結果を全
体制御ｌ装置６０４へ出力するようにしても良い。Further, the calculation of the size D of the irradiation field 103A may be performed in the irradiation field aperture control device 115, and the result may be output to the overall control device 604.
なお、本実施態様においてはＸ線源１０１と蓄積性螢光
体シート １０３の相対的位置関係が、例えはＸ線源１
０１の中心を通る線上に蓄積性螢光体シートの中心を合
致させるなどして一定に決められているので、照射野１
０３Ａの大きさが決まれば、照射野１０３Ａの蓄積性螢
光体シート１０３上における位置が一義的に決定できる
ようになっている（すなわち、大きさの情報の中に位置
の情報が含まれている）。一方、Ｘ線源１０１と蓄積性
螢光体シートの位置関係が一定でない場合には、この位
置関係を撮影部において検出し、全体制御装置６０４を
介して、その情報を読取制御装置４１４へ出力するよう
にすれば良い。Note that in this embodiment, the relative positional relationship between the X-ray source 101 and the stimulable phosphor sheet 103 is, for example,
The irradiation field 1 is fixed by aligning the center of the stimulable phosphor sheet with the line passing through the center of 01.
Once the size of 03A is determined, the position of the irradiation field 103A on the stimulable phosphor sheet 103 can be uniquely determined (that is, the position information is included in the size information). ). On the other hand, if the positional relationship between the X-ray source 101 and the stimulable phosphor sheet is not constant, this positional relationship is detected in the imaging unit and the information is output to the reading control device 414 via the overall control device 604. All you have to do is do it.
この撮影部は読取部と別体になっていても、また一体向
に構成されていても良い。This photographing section may be separate from the reading section, or may be configured integrally with the reading section.
読取部４においては、レーザ光源４０１から発せられた
レーザ光４０２はこのレーザ光４０２の励起によって蓄
積性螢光体シート１０３から発する輝尽発８−
先光の波長領域をカットするフィルター４０３を通過し
た後、ビームエクスパンター４０４によりビーム径の大
きさが厳密に調整され、ガルバノミラ−等の光偏向器４
０５によって平面反射鏡４０Ｇを介して蓄積性螢光体シ
ート １０３上に偏向せしめられて入射する。光偏向器
４０５と平面反射鏡４０６との間にはｆθレンス４０７
が配され、螢光体シート １０３上をレーザ光４０２が
走査されてもつねに均一なビーム径を有するようにされ
ている。他方、螢光体シート１０３は矢印４０８の方向
に移送せしめられて副走査がなされ、その結果、螢光体
シート１ｏ３の全面にわたってレーザ光が照射せしめら
れる。かようにレーザ光４０２が照射せしめられると、
蓄積性螢光体シー１−１０３は蓄積記録されているＸ線
エネルギーに比例する光量の輝尽発光光を発し、この発
光光は本読み用導光性シート４０９に入射する。In the reading unit 4, a laser beam 402 emitted from a laser light source 401 is excited by the laser beam 402 and passes through a filter 403 that cuts the wavelength region of the photostimulated light emitted from the stimulable phosphor sheet 103. After that, the beam diameter is strictly adjusted by a beam expander 404, and an optical deflector 4 such as a galvanometer mirror is used.
05, the light is deflected and incident onto the stimulable phosphor sheet 103 via the plane reflecting mirror 40G. An fθ lens 407 is provided between the optical deflector 405 and the plane reflecting mirror 406.
are arranged so that even when the laser beam 402 scans the phosphor sheet 103, the beam diameter is always uniform. On the other hand, the phosphor sheet 103 is moved in the direction of arrow 408 to perform sub-scanning, and as a result, the entire surface of the phosphor sheet 1o3 is irradiated with laser light. When the laser beam 402 is irradiated in this way,
The stimulable phosphor sheet 1-103 emits stimulated luminescent light in an amount proportional to the stored and recorded X-ray energy, and this luminescent light enters the main reading light guide sheet 409.
この導光性シート４０９は、その入射面は直線状をなし
、蓄積性螢光体シーｈ １０３上の走査線に対向するよ
うに隣接して配置され、射出面（ま円環状をなし、フォ
トマル等の光検出器４１０の受光面に密着せしめられて
いる。この導光性シート４０９は、アクリル系樹脂等の
透明熱可塑性樹脂シートを加工してつくられたもので、
入射面より入射した光がその内部を全反射しつつ射出面
へ伝達されるよう構成されており、蓄積性螢光体シート
１０３からの輝尽発光光はこの導光性シート４０９内
を導かれ、射出面から射出して光検出器４１０によって
受光される。導光性シートの好ましい形状、材質等は特
開昭５５−８７９７０号、同５Ｇ−１１３９７号公報等
に開示されている。光検出器４１０の受光面には、輝尽
発光光の波長域のみを選択的に透過するフィルターが貼
着せしめられ、光検出器４１０が輝尽発光光のみを検出
するように工夫されている。The light guide sheet 409 has a linear incident surface, is arranged adjacent to and opposite to the scanning line on the stimulable phosphor sheet h 103, and has an exit surface (an annular shape, photo The light-guiding sheet 409 is brought into close contact with the light-receiving surface of a photodetector 410.
The structure is such that the light incident from the incident surface is transmitted to the exit surface while being totally reflected inside, and the stimulated luminescent light from the stimulable phosphor sheet 103 is guided through the light guiding sheet 409. , is emitted from the exit surface and is received by the photodetector 410. Preferred shapes, materials, etc. of the light-guiding sheet are disclosed in Japanese Patent Application Laid-open Nos. 55-87970 and 5G-11397. A filter that selectively transmits only the wavelength range of the stimulated luminescent light is attached to the light receiving surface of the photodetector 410, so that the photodetector 410 detects only the stimulated luminescent light. .
ここで画像情報の読取領域を蓄積性螢光体シート １０
３上における照射野１０３Ａ内に絞るために以下の走査
が行なわれる。すなわち読取制御装置４１４は全体制御
装置６０４から入力される照射野１０３Ａの位置情報を
含／υだ大きさの情報又は位置と大きさの情報に基づき
決定される次の信号、すなわち主走査線上に照射野１０
３Ａがある間だけ光偏向器ドライバ４１７を駆動させる
オンオフ信号と主走査の振幅を照射野の中方向の長さに
限定する振幅信号を、光偏向器ドライバ４１７に送る。Here, the image information reading area is set using a stimulable phosphor sheet.
The following scanning is performed to focus within the irradiation field 103A on 3. That is, the reading control device 414 inputs the position information of the irradiation field 103A inputted from the overall control device 604 and the next signal determined based on the size information or the position and size information, that is, on the main scanning line. Irradiation field 10
An on/off signal that drives the optical deflector driver 417 only while 3A is present, and an amplitude signal that limits the amplitude of main scanning to the length in the middle direction of the irradiation field are sent to the optical deflector driver 417.
光偏向器は照射野１０３Ａが主走査線上に存在しないと
きはレーザ光を蓄積性螢光体シートに当らない方向に反
射させる位置に停止しているが、前記駆動のオン信号が
入力されると、振幅信号によって指令された振幅で蓄積
性螢光体シートを走査し、前記駆動のオフ信号に従って
その走査を終了する。こうすることによって照射野１０
３Ａの内側のみにレーザ光が照射せしめられる。なお、
上記においては副走査方向の読取領域を照射野１０３Ａ
に絞るため光偏向器ドライバ４１７の駆動を制御してい
るが、これに代えて、レーザ光の光路中にシャッタを設
け、照射野１０３Ａが主走査線上にある間だけこのシャ
ッタを開放するようにしてもよい。When the irradiation field 103A is not on the main scanning line, the optical deflector is stopped at a position where it reflects the laser beam in a direction that does not hit the stimulable phosphor sheet, but when the drive ON signal is input, , scans the stimulable phosphor sheet with an amplitude commanded by the amplitude signal, and terminates the scanning according to the drive off signal. By doing this, the irradiation field 10
Laser light is irradiated only on the inside of 3A. In addition,
In the above, the reading area in the sub-scanning direction is the irradiation field 103A.
The drive of the optical deflector driver 417 is controlled in order to focus on the laser beam, but instead of this, a shutter is provided in the optical path of the laser beam, and this shutter is opened only while the irradiation field 103A is on the main scanning line. It's okay.
本発明においては、励起光の波長領域と輝尽発光光の波
長領域とが重複しないことがＳ／Ｎ比を向上させるため
に好ましく、かような関係を充足するように励起光源お
よび蓄積性螢光体を選択す＝１１−
ることが好ましい。具体的には、特開昭５５−１２４２
θ号公報に開示されているように、励起光波長が６００
〜７００ｎＩｌｌに、輝尽発光光の波長が３００〜５０
０ｎｍになるようにすることが望ましい。In the present invention, it is preferable that the wavelength region of the excitation light and the wavelength region of the stimulated luminescent light do not overlap in order to improve the S/N ratio, and the excitation light source and the stimulable fluorescent light are selected so as to satisfy such a relationship. It is preferable to select a light body=11-. Specifically, Japanese Patent Application Laid-Open No. 55-1242
As disclosed in the θ publication, the excitation light wavelength is 600
~700nIll, the wavelength of stimulated luminescence light is 300~50
It is desirable that the thickness be 0 nm.
本発明において好ましく使用し得る蓄積性螢光体は特開
昭５５−１２１４２号、同５５−１４１４３号、同５５
−１４１４４号、同５５−１４１４５号等に記載されて
いる。The stimulable phosphor that can be preferably used in the present invention is JP-A-55-12142, JP-A-55-14143, JP-A-55
-14144, No. 55-14145, etc.
光検出器４１０により検出された輝尽発光光は電気信号
に変換され増幅率設定値ａによって感度設定された増幅
器４１１により適正なレベルの電気信号に増幅された後
、Ａ／Ｄ変換器４１２に入力される。Ａ／Ｄ変換器４１
２では収録スケールファクタ設定値すにより信号変動幅
に適したスケールファクタでディジタル信号に変換され
、信号処理回路４１３に入力される。信号処理回路では
再生画像処理条件設定値Ｃに基づき観察読影適性の優れ
たＸ線画像が得られるよう信号処理がなされ再生記録部
へ伝送され、光変調器５０１へ入力される。The stimulated luminescent light detected by the photodetector 410 is converted into an electrical signal, and after being amplified to an appropriate level electrical signal by the amplifier 411 whose sensitivity is set by the amplification factor setting value a, the stimulated luminescence light is sent to the A/D converter 412. is input. A/D converter 41
In step 2, the signal is converted into a digital signal with a scale factor suitable for the signal fluctuation range according to the recording scale factor setting value, and is input to the signal processing circuit 413. In the signal processing circuit, signal processing is performed based on the reproduction image processing condition setting value C so as to obtain an X-ray image excellent in suitability for observation and interpretation, and the signal is transmitted to the reproduction recording section and input to the optical modulator 501.
再生記録部５においては、記録用レーザ光源５０２から
のレーザ光５０３が光変調器５０１により画像１２−
信号に基づいて変調せしめられ、走査ミラー５０４によ
って写真フィルム等の感光材料５０５上を走査される。In the reproducing/recording section 5, a laser beam 503 from a recording laser light source 502 is modulated by an optical modulator 501 based on an image 12- signal, and scanned by a scanning mirror 504 onto a photosensitive material 505 such as a photographic film. .
この際、感光材料５０５は走査方向と垂直の方向（矢印
５０６）に走査と同期して移送せしめられているため、
感光材料５０５上にＸ線画像が出力される。At this time, since the photosensitive material 505 is transported in a direction perpendicular to the scanning direction (arrow 506) in synchronization with the scanning,
An X-ray image is output on the photosensitive material 505.
この実施態様においては光変調器制御装置５０７を設け
、全体制御装置６０４から入力される前記照射野１０３
Ａの大きさの情報（位置情報を含んでいるもの）、また
は大きさと位置の情報に基づき、感光材料５０５上に画
像記録領域５０５Ａを形成するように画像情報の出力を
行ない、前記照射野の内側の画像だけを表示することに
より、より鮮明な最終画像を得るようにしている。In this embodiment, a light modulator control device 507 is provided, and the irradiation field 103 receives input from an overall control device 604.
Image information is outputted to form an image recording area 505A on the photosensitive material 505 based on the size information (including position information) or the size and position information of A, and the irradiation field is By displaying only the inner image, a clearer final image is obtained.
全体制御部６は前記全体制御装置６０４とコンソール６
０３とから成り、前記照射野１０３Ａの位置情報を含む
大きさ、または大きさと位置の双方を計算するのみなら
ず、読取の密度や速度、更に前記増幅率設定値８１収録
スケールフアクタ設定値ｂ、再生画像処理条件設定値Ｃ
等が設定できる。The overall control unit 6 includes the overall control device 604 and the console 6.
03, which not only calculates the size including the position information of the irradiation field 103A, or both the size and the position, but also calculates the reading density and speed, as well as the amplification factor setting value 81 recording scale factor setting value b , reproduction image processing condition setting value C
etc. can be set.
本発明は以上述べたような実施態様に限定されることは
なく、種々の変更が可能であることは言うまでもない。It goes without saying that the present invention is not limited to the embodiments described above, and that various modifications are possible.
例えば、特開昭５８−６７２４０号、同５ｇ−６７２４
２号、同５８−６７２４３号等に開示されるように、前
記読取部４における読取操作に先立って、低エネルギー
の励起光を用い、画像情報を予め把握するための読取操
作（「先読み」〉を行ない、この先読みの結果に基づい
て、前記増幅率設定値ａ１収録スケールファクタ設定値
ｂ１再生画像処理条件設定値Ｃ等を設定せしめても良い
。For example, JP-A-58-67240, JP-A-58-6724
As disclosed in No. 2, No. 58-67243, etc., prior to the reading operation in the reading section 4, a reading operation ("pre-reading") is performed to grasp image information in advance using low-energy excitation light. Based on the result of this pre-reading, the amplification factor setting value a1, recording scale factor setting value b1, reproduction image processing condition setting value C, etc. may be set.
また、特開昭５８−８９２４４号に示されるように減感
部を撮影部と先読み部の間に設けても良い。Further, as shown in Japanese Patent Application Laid-Open No. 58-89244, a desensitizing section may be provided between the photographing section and the pre-reading section.
更に、読取部における励起光源であるレーザ光源を、輝
尽発光光と異なる波長領域を有するＬＥＤアレイに置き
換えて、光偏向器を省略することもできる。Furthermore, the laser light source serving as the excitation light source in the reading section may be replaced with an LED array having a wavelength range different from that of the stimulated emission light, thereby omitting the optical deflector.
また、光検出器も導光性シートを伴った単一のものに限
らず、例えばフォトマルあるいはフォトトランジスタを
複数個主走査方向に一直線状に並べたものとしても良い
。Further, the photodetector is not limited to a single one with a light-guiding sheet, but may be one in which a plurality of photomultiples or phototransistors are arranged in a straight line in the main scanning direction, for example.
再生記録部５における記録方法もレーザ光源による直接
的な記録方法に限らず、例えばＣＲＴやビデオプリンタ
等に表示せしめる方法を用いることができる。The recording method in the reproducing/recording section 5 is not limited to the direct recording method using a laser light source, but may also be a method of displaying on a CRT, video printer, etc., for example.
図面は本発明の実施態様であるＸ線画像情報記録読取装
置を含むＸ線画像情報記録読取システムの概略図である
。
１・・・・・・・・・撮 影 部 １０１・・・・・・
Ｘ 線 源１０２・・・・・・被 写 体
１０３・・・・・・蓄積性螢光体シート１０３Ａ・・・
放射線照射野
１１０・・・・・・照射野絞り
１１５・・・・・・照射野絞り制御装置４・・・・・・
・・・読 取 部 ４０１・・・・・・レーザ光源４０
２・・・・・・レーザ光 ４０３・・・・・・フィルタ
ー４０４・・・・・・ビームエクスパンダ−４０５・・
・・・・光偏向器 ４０６・・・・・・平面反射鏡４０
７・・・・・・ｆθレンズ ４０８・・・・・・移送方
向１５−
４０９・・・・・・導光性シート ４１０・・・・・・
光検出器４１１・・・・・・増 幅 器 ４１２・・・
・・・Ａ／Ｄ変換器４１３・・・・・・信号処理回路
４１４・・・・・・読取制御装置４１７・・・・・・光
偏向器ドライバ
５・・・・・・・・・再生記録部 ５０１・・・・・・
光変調器５０２・・・・・・記録用レーザ光源
５０３・・・・・・レーザ光 ５０４・・・・・・走査
ミラー５０５・・・・・・感光材料 ５０５Ａ・・・画
像記録領域５０７・・・・・・光変調器制御装置
６・・・・・・・・・全体制御部 ６０３・・・・・・
コンソール６０４・・・・・・全体制御装置
１６−The drawing is a schematic diagram of an X-ray image information recording/reading system including an X-ray image information recording/reading apparatus which is an embodiment of the present invention. 1... Photography Department 101...
X-ray source 102...Subject 103...Storage phosphor sheet 103A...
Radiation field 110... Radiation field aperture 115... Radiation field aperture control device 4...
... Reading section 401 ... Laser light source 40
2...Laser light 403...Filter 404...Beam expander-405...
....Light deflector 406 ....Plane reflecting mirror 40
7...Fθ lens 408...Transfer direction 15- 409...Light guide sheet 410...
Photodetector 411...Amplifier 412...
... A/D converter 413 ... Signal processing circuit
414...reading control device 417...optical deflector driver 5...playback recording section 501...
Light modulator 502... Recording laser light source 503... Laser light 504... Scanning mirror 505... Photosensitive material 505A... Image recording area 507. ...... Optical modulator control device 6 ...... Overall control section 603 ...
Console 604... Overall control device 16-
Claims (1)
体シートに蓄積記録し、この蓄積性螢光体シートに励起
光を照射し、前記蓄積性螢光体シートに蓄積記録されて
いる放射線画像情報を輝尽発光せしめ、得られた輝尽発
光光を光学的に読み取って観察読影のための画像情報を
得る放射線画像情報記録読取方法において、 前記画像情報の読取領域を前記蓄積性螢光体シートの画
像記録時における放射線の照射野内に絞ることを特徴と
する放射線画像情報記録読取方法。 ２）放射線画像情報を蓄積性螢光体シートに蓄積記録す
るための照射野絞りを持つ撮影部および前記蓄積性螢光
体シートに励起光を照射し、これにより前記シー１−か
ら発する放飼線画像情報を担った輝尽発光光を光電的に
読み取って画像信号を得る読取部を有する放射線画像情
報記録読取装置において、 前記撮影部における蓄積性螢光体シートへの画像記録時
の放射線の照射野に関する情報に基づいて、前記画像情
報の読取領域を前記照射野内に絞る手段を設けたことを
特徴とする放射線画像情報記録読取装置。[Scope of Claims] 1) Radiation image information is accumulated and recorded on a stimulable phosphor sheet by applying an irradiation field aperture, and the stimulable phosphor sheet is irradiated with excitation light, and the stimulable phosphor sheet is A method for recording and reading radiation image information in which radiation image information stored on a sheet is stimulated to emit light, and the resulting stimulated light is optically read to obtain image information for observation and interpretation, comprising: A radiation image information recording/reading method characterized in that the reading area is narrowed down to a radiation irradiation field during image recording of the stimulable phosphor sheet. 2) Excitation light is irradiated to the imaging unit having an irradiation field aperture for accumulating and recording radiation image information on the stimulable phosphor sheet and the stimulable phosphor sheet, and the release is thereby emitted from the sheet 1-. In a radiation image information recording/reading device having a reading section that photoelectrically reads the stimulated luminescence light carrying line image information to obtain an image signal, there is provided a radiation image information recording/reading device having a reading section that photoelectrically reads the stimulated luminescence light carrying line image information to obtain an image signal. A radiation image information recording/reading apparatus, comprising means for narrowing down a reading area of the image information to within the irradiation field based on information regarding the irradiation field.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58228163A JPS60120346A (en) | 1983-12-02 | 1983-12-02 | Method and device for recording and reading radiation image information |
| DE8484114598T DE3473934D1 (en) | 1983-12-02 | 1984-11-30 | Method and apparatus for radiation image recording and read-out |
| US06/676,957 US4816690A (en) | 1983-12-02 | 1984-11-30 | Method and apparatus for radiation image recording and read-out including control of read-out in accordance with irradiation field definition |
| EP84114598A EP0152563B1 (en) | 1983-12-02 | 1984-11-30 | Method and apparatus for radiation image recording and read-out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58228163A JPS60120346A (en) | 1983-12-02 | 1983-12-02 | Method and device for recording and reading radiation image information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60120346A true JPS60120346A (en) | 1985-06-27 |
| JPH0454217B2 JPH0454217B2 (en) | 1992-08-28 |
Family
ID=16872216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58228163A Granted JPS60120346A (en) | 1983-12-02 | 1983-12-02 | Method and device for recording and reading radiation image information |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60120346A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62177536A (en) * | 1986-01-30 | 1987-08-04 | Fuji Photo Film Co Ltd | Radiation image information recording and reading system |
| JPS63121835A (en) * | 1986-11-11 | 1988-05-25 | Konica Corp | Method and device for processing radiation image information |
| JPS63183436A (en) * | 1987-01-27 | 1988-07-28 | Fuji Photo Film Co Ltd | Method and device for reading radiation image signal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4383558B2 (en) * | 1998-07-21 | 2009-12-16 | 東芝医用システムエンジニアリング株式会社 | X-ray diagnostic apparatus and radiation diagnostic apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867243A (en) * | 1981-10-16 | 1983-04-21 | 富士写真フイルム株式会社 | Apparatus for reading out radioactive image information |
| JPS5867240A (en) * | 1981-10-16 | 1983-04-21 | 富士写真フイルム株式会社 | System for reading out radioactive image information |
| JPS6032044A (en) * | 1983-08-02 | 1985-02-19 | Toshiba Corp | Photographing device using radiant ray |
-
1983
- 1983-12-02 JP JP58228163A patent/JPS60120346A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5867243A (en) * | 1981-10-16 | 1983-04-21 | 富士写真フイルム株式会社 | Apparatus for reading out radioactive image information |
| JPS5867240A (en) * | 1981-10-16 | 1983-04-21 | 富士写真フイルム株式会社 | System for reading out radioactive image information |
| JPS6032044A (en) * | 1983-08-02 | 1985-02-19 | Toshiba Corp | Photographing device using radiant ray |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62177536A (en) * | 1986-01-30 | 1987-08-04 | Fuji Photo Film Co Ltd | Radiation image information recording and reading system |
| JPS63121835A (en) * | 1986-11-11 | 1988-05-25 | Konica Corp | Method and device for processing radiation image information |
| JPS63183436A (en) * | 1987-01-27 | 1988-07-28 | Fuji Photo Film Co Ltd | Method and device for reading radiation image signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0454217B2 (en) | 1992-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |