JPS5995035A - X-ray simultaneous irradiating type energy subtraction original photographic method - Google Patents
X-ray simultaneous irradiating type energy subtraction original photographic methodInfo
- Publication number
- JPS5995035A JPS5995035A JP57204130A JP20413082A JPS5995035A JP S5995035 A JPS5995035 A JP S5995035A JP 57204130 A JP57204130 A JP 57204130A JP 20413082 A JP20413082 A JP 20413082A JP S5995035 A JPS5995035 A JP S5995035A
- Authority
- JP
- Japan
- Prior art keywords
- ray
- energy subtraction
- type energy
- photographic method
- subtraction
- 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
- 238000000034 method Methods 0.000 title claims description 9
- 230000001678 irradiating effect Effects 0.000 title 1
- 239000002872 contrast media Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims 2
- 238000003384 imaging method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 235000010724 Wisteria floribunda Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000002594 fluoroscopy Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 238000011410 subtraction method Methods 0.000 description 1
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
- Apparatus For Radiation Diagnosis (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】
この発明はこれ迄造影前と造影後に分けて別々に撮影す
ることをよぎなくされていた、Ｘ線写真のマスク像と造
影像とを同時に撮影することによって、被写体の動きに
よる障害像の発生を完全に防止する方法である。[Detailed Description of the Invention] This invention enables the imaging of a subject by simultaneously photographing a mask image and a contrast image of an X-ray photograph, which until now had to be taken separately before and after contrast imaging. This is a method that completely prevents the occurrence of obstruction images due to movement.
Ｘ線写真のサブトラクションは古くから写真フィルム法
で実施されていたが、最近Ｘ線テレビジョンのビデオ信
号をディジタルメモリーを用いて電子回路で加算、減算
するディジタルフロロスコピー（ＤＦ）が実用化されて
おシ、又富士写真フィルム株式会社が製作した、フジ、
コンピユーテッド、ラジオグラフィ（略称ＦＯＲ）商、
・品名も画像をビデオ信号化して後サブトラクションそ
の他種々の画像処理をおこなった後写真フィルムに焼付
けているが、これ等の方法では時間差サブトラクション
はもとよシ、エネルギーサブトラクションも硬Ｘ線と、
軟Ｘ線を別々に照射する必要があるため、その間の被写
体の動きが問題となる。Subtraction in X-ray photography has long been carried out using the photographic film method, but recently digital fluoroscopy (DF), which adds and subtracts video signals from X-ray television using electronic circuits using digital memory, has been put into practical use. Fuji, also produced by Fuji Photo Film Co., Ltd.
Computed, radiography (abbreviated as FOR) quotient,
・The name of the product is that the image is converted into a video signal, subjected to post-subtraction and other various image processing, and then printed on photographic film, but these methods not only involve time-lag subtraction, but also energy subtraction, which uses hard X-rays,
Since it is necessary to irradiate soft X-rays separately, the movement of the subject during that time poses a problem.
本−発明はＦＯＲに用いられるイメージングプレート（
商品名）など、撮影条件許容範囲の極めて広い２枚のＸ
線感光板の間に、沃素系造影剤など１部の波長のＸ線を
かたよって吸収する、特殊な吸収波長特性を有する物質
で、撮影時使用する同じ物質をフィルターとしてサンド
イッチ状にはさみ込んで、造影剤を入れた被写体をこの
サンドインチした２枚のＸ線感光板に同時に撮影すれば
、被写体に近い１枚目のＸ線感光板には普通に撮影され
、フィルターを通して撮影された２枚目のＸ線感光板に
は全面にわたシフイルター及び造影剤の吸収端に相当す
る波長のＸ線が著しく減少してＸ線波長分布が１枚目と
著しく変わったＸ線が入射する。従がって２枚目のＸ線
感光板に写ったＸ線像は造影剤の影像が１枚目のそれに
比較して消去されているためマスク像となる。それでこ
のようにして写した２枚のＸ線感光板の画像をＦＯＲ等
で用いられるサブトラクションの手法で処理すれば、被
写体内の造影剤だけの画像を強調して現わす事が出来る
。This invention is an imaging plate (
Product name), etc., two X images with an extremely wide range of acceptable shooting conditions.
A substance with special absorption wavelength characteristics that absorbs X-rays of a certain wavelength unevenly, such as an iodine-based contrast agent, is sandwiched between the radiation-sensitive plates as a filter, and contrast is produced. If an object containing a drug is photographed at the same time on the two sandwiched X-ray photosensitive plates, the first X-ray photosensitive plate closest to the subject will receive a normal image, while the second photo taken through the filter will be photographed. X-rays with a wavelength corresponding to the absorption edge of the shift filter and the contrast agent are significantly reduced over the entire surface of the X-ray photosensitive plate, and the X-ray wavelength distribution is significantly different from that of the first plate. Therefore, the X-ray image reflected on the second X-ray photosensitive plate becomes a mask image because the image of the contrast medium has been erased compared to that of the first X-ray photosensitive plate. Therefore, if the images of the two X-ray photosensitive plates taken in this manner are processed using a subtraction technique used in FOR, etc., it is possible to emphasize and display an image of only the contrast agent within the object.
以上の方法では１枚目のＸ線感光板と、フィルターを通
して写す２枚目のＸ線感光板に入射するＸ線量は・２枚
目のそれに到達するＸ線量が少なくなシその比は１０対
１程度になるが、ＦＯＲ等の物理現象利用のＸ線感光板
を用いれば、撮影条件の許容範囲が広いため実用上の問
題とならない。又Ｘ線感光板の重ね合わせは２枚に限ら
ず、さらに増加して画像処理を複合化する事も出来る。In the above method, the amount of X-rays incident on the first X-ray photosensitive plate and the second X-ray photosensitive plate photographed through the filter is 10: However, if an X-ray photosensitive plate that utilizes a physical phenomenon such as FOR is used, the permissible range of imaging conditions is wide, so this is not a practical problem. Further, the number of overlapping X-ray photosensitive plates is not limited to two, and it is also possible to increase the number of overlapping X-ray photosensitive plates to perform complex image processing.
尚この方法は造影剤の撮影にかぎらず、被写体内に存在
する物質が照射Ｘ線中の１部の波長にかたよった吸収を
する物質であれば、それと同じ物質又はその物質類似の
Ｘ線吸収フィルターを用いて、前述同様に写し出す事が
可能である。This method is not limited to imaging contrast agents; if the substance present in the subject absorbs partial wavelengths of the irradiated X-rays, it can be used to absorb X-rays from the same substance or similar substances. Using a filter, it is possible to image the image in the same way as described above.
以上のように本発明の方法は、これ迄のＸ線画像のサブ
トラクション・法で不可能であったマスク像を同時に撮
影する事によって、被検者の心臓その他の動きによる障
害を除き、障害形のないサブトラクション撮影を可能に
した。As described above, the method of the present invention eliminates obstacles caused by the subject's heart and other movements by simultaneously capturing a mask image, which has been impossible with conventional X-ray image subtraction methods. This enables subtraction-free shooting.
１９19
Claims (1)
、被写体に使用する造影剤など被写体中の撮影目的物の
Ｘ線吸収特性に類似のＸ線吸収特性を有するＸ線吸収フ
ィルターを、複数枚のＸ線感光板のＩ間にはさんでサン
ドインチ状に重ね合わせた複数枚のＸ線感光板から成る
複合Ｘ線感光板に、造影剤等が入った被写体をＸ線撮影
することを特徴とし。撮影済み複合Ｘ線感光板の１枚１
枚からそれぞれ別々にＸ線画像を取シ出し、それ等の画
像間でサブトラクションを実施する。Ｘ線同時照射式エ
ネルギーサブトラクション原画撮影方法Energy subtraction for X-ray photography When taking original images, multiple X-ray-sensitive It is characterized by X-ray photography of a subject containing a contrast agent, etc. on a composite X-ray photosensitive plate consisting of multiple X-ray photosensitive plates stacked in a sandwich-like manner sandwiched between the I plates. 1 piece of photographed composite X-ray photosensitive plate
X-ray images are extracted from each sheet separately, and subtraction is performed between the images. Simultaneous X-ray irradiation energy subtraction original image shooting method
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57204130A JPS5995035A (en) | 1982-11-20 | 1982-11-20 | X-ray simultaneous irradiating type energy subtraction original photographic method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57204130A JPS5995035A (en) | 1982-11-20 | 1982-11-20 | X-ray simultaneous irradiating type energy subtraction original photographic method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5995035A true JPS5995035A (en) | 1984-05-31 |
Family
ID=16485323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57204130A Pending JPS5995035A (en) | 1982-11-20 | 1982-11-20 | X-ray simultaneous irradiating type energy subtraction original photographic method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5995035A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7644920B2 (en) | 2004-09-09 | 2010-01-12 | Funai Electric Co., Ltd. | Image forming apparatus with offset feed roller from separation portion |
-
1982
- 1982-11-20 JP JP57204130A patent/JPS5995035A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7644920B2 (en) | 2004-09-09 | 2010-01-12 | Funai Electric Co., Ltd. | Image forming apparatus with offset feed roller from separation portion |
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