JPS647359Y2 - - Google Patents
Info
- Publication number
- JPS647359Y2 JPS647359Y2 JP1802681U JP1802681U JPS647359Y2 JP S647359 Y2 JPS647359 Y2 JP S647359Y2 JP 1802681 U JP1802681 U JP 1802681U JP 1802681 U JP1802681 U JP 1802681U JP S647359 Y2 JPS647359 Y2 JP S647359Y2
- Authority
- JP
- Japan
- Prior art keywords
- ray
- neck
- head
- filter
- metal member
- 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.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 7
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010521 absorption reaction Methods 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
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
Landscapes
- Analysing Materials By The Use Of Radiation (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
【考案の詳細な説明】
本考案は人体の頭頚部の診断のためにＸ線撮影
するときに使用する頭頚部Ｘ線撮影用フイルタに
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a head and neck X-ray imaging filter used when performing X-ray imaging for diagnosis of the head and neck of a human body.
従来、人体の頭頚部の診断のためにＸ線撮影を
行うとき、Ｘ線管の出力取出し口に平坦なアルミ
ニウム板あるいはそれに類した金属を取付けて軟
Ｘ線を除去していた。 Conventionally, when performing X-ray photography for diagnosis of the head and neck of a human body, a flat aluminum plate or similar metal was attached to the output outlet of the X-ray tube to remove soft X-rays.
第１図は従来のＸ線撮影を説明するための部分
切欠き側面図である。 FIG. 1 is a partially cutaway side view for explaining conventional X-ray photography.
Ｘ線管１の出力取出し部に多重絞り２を設け、
多重絞り２の出口にフイルタ３を設ける。撮影用
テーブル４の下にフイルム５が置かれる。患者の
頭頚部６を撮影用テーブル４に載せ、Ｘ線７を照
射し、フイルム５に撮影する。頭頚部撮影の条件
は、陽極電圧85kV、陽極電流600mA、撮影時間
0.05mS程度である。 A multiple aperture 2 is provided at the output extraction part of the X-ray tube 1,
A filter 3 is provided at the outlet of the multiple aperture 2. A film 5 is placed under the photographing table 4. The patient's head and neck 6 is placed on a photographing table 4, irradiated with X-rays 7, and photographed on a film 5. The conditions for head and neck imaging are anode voltage 85kV, anode current 600mA, and imaging time.
It is about 0.05mS.
上記のようなＸ線撮影において、頭頚部のよう
に骨が占める割合が高い場合、骨の存在する中央
部分と骨の存在しない周囲部分とのＸ線吸収量の
差が大きいため、骨の存在する部分が適正露出と
なるようにＸ線強度を調節すると骨のない部分の
露出が過剰となり、フイルム５では骨のない部分
が黒くなり過ぎる。逆に、骨のない部分が適正露
出となるようにＸ線強度を調整すると骨のある部
分が白くなり過ぎる。いずれに合わせても従来の
Ｘ線撮影では適正露出のＸ線写真を得ることが難
しいという欠点があつた。 In the above-mentioned X-ray imaging, when bones account for a large proportion of the body, such as in the head and neck, there is a large difference in the amount of X-ray absorption between the central area where bones exist and the surrounding areas where there are no bones. If the X-ray intensity is adjusted so that the exposed areas are properly exposed, the boneless areas will be overexposed, and in Film 5, the boneless areas will be too dark. Conversely, if the X-ray intensity is adjusted to properly expose areas without bones, areas with bones will appear too white. In any case, conventional X-ray photography has the disadvantage that it is difficult to obtain properly exposed X-ray photographs.
本考案は上記欠点を除き、Ｘ線の出力取出し口
に取付けられるフイルタの厚さに傾斜をもたせる
ことにより頭頚部のＸ線写真の過剰露出あるいは
不足露出を防ぐことを可能とする頭頚部Ｘ線撮影
用フイルタを提供するものである。 The present invention eliminates the above-mentioned drawbacks and provides a head and neck X-ray that makes it possible to prevent overexposure or underexposure in X-ray photographs of the head and neck by slanting the thickness of the filter attached to the X-ray output outlet. The present invention provides a photographic filter.
本考案の頭頚部Ｘ線撮影用フイルタは、一部が
開いている環をなし、前記環の外周近傍から中心
に向つて厚さが減少するように傾斜が設けられた
金属部材と、前記金属部材の周囲を囲んで保持
し、外周が矩形をなす取付板とを含んで構成され
る。 The filter for head and neck X-ray imaging of the present invention has a metal member having a partially open ring shape and having a slope such that the thickness of the ring decreases from near the outer periphery toward the center; The mounting plate surrounds and holds the member and has a rectangular outer periphery.
本考案を実施例により説明する。 The present invention will be explained by way of examples.
第２図ａ，ｂは本考案の一実施例の平面図およ
びＡ−A′断面図である。 Figures 2a and 2b are a plan view and a sectional view taken along line A-A' of an embodiment of the present invention.
金属部材１１は開環部１２で開いた環状をな
し、外周近傍から中心に向つて厚さが減少するよ
うな傾斜を有する。外周縁は平坦であることが望
ましいが、傾斜していても良い。金属部材１１の
周囲を囲んで保持する矩形の取付板１３を取付け
る。 The metal member 11 has an annular shape that is open at an open ring portion 12, and has an inclination such that the thickness decreases from near the outer periphery toward the center. The outer peripheral edge is preferably flat, but may be sloped. A rectangular mounting plate 13 that surrounds and holds the metal member 11 is attached.
このように構成された本考案の頭頚部Ｘ線撮影
用フイルタは環の中心部及び開環部１２でのＸ線
吸収はなく、外周に向うに従つてＸ線吸収が増加
する。このフイルタを用いて頭頚部Ｘ線撮影を行
うと、骨のある部分でのＸ線強度は大きく骨のな
い部分のＸ線強度は小さくなり、フイルム５への
露出量は均斉がとれ、見やすいＸ線透視写真が得
られる。 The filter for head and neck X-ray imaging of the present invention constructed in this manner does not absorb X-rays at the center of the ring or at the open ring portion 12, but absorbs X-rays increasing toward the outer periphery. When head and neck X-ray photography is performed using this filter, the X-ray intensity in areas with bones is high and the X-ray intensity in areas without bones is low, and the amount of exposure to the film 5 is balanced, making it easy to see the X-rays. Linear fluorographs are obtained.
上記実施例では、開環部１２は環の中心を中心
とする半径方向に切欠いて設けたが、平行な開環
部を設けても良い。金属部材１１の材料にはAl
等が適する。 In the above embodiment, the ring opening part 12 is cut out in the radial direction around the center of the ring, but parallel opening parts may be provided. The material of the metal member 11 is Al.
etc. are suitable.
以上詳細に説明したように、本考案は被撮影体
のＸ線吸収量と逆の吸収量となるフイルタである
ので、本考案のフイルタを用いるとより鮮明な頭
頚部Ｘ線透視写真が得られるという効果が得られ
る。 As explained in detail above, the present invention is a filter that absorbs X-rays in an amount opposite to that of the subject, so using the filter of the present invention enables clearer head and neck X-ray fluoroscopic photographs to be obtained. This effect can be obtained.
第１図は従来のＸ線撮影を説明するための一部
切欠き側面図、第２図ａ，ｂは本考案の一実施例
の平面図および断面図である。
１……Ｘ線管、２……多重絞り、３……フイル
タ、４……撮影用テーブル、５……フイルム、６
……頭頚部、７……Ｘ線、１０……フイルタ、１
１……金属部材、１２……開環部、１３……取付
板。
FIG. 1 is a partially cutaway side view for explaining conventional X-ray photography, and FIGS. 2a and 2b are a plan view and a sectional view of an embodiment of the present invention. 1...X-ray tube, 2...Multiple aperture, 3...Filter, 4...Photography table, 5...Film, 6
...Head and neck, 7...X-ray, 10...Filter, 1
DESCRIPTION OF SYMBOLS 1... Metal member, 12... Opening part, 13... Mounting plate.
Claims (1)
から中心に向つて厚さが減少するように傾斜が設
けられた金属部材と、前記金属部材の周囲を囲ん
で保持し、外周が矩形をなす取付板とを含むこと
を特徴とする頭頚部Ｘ線撮影用フイルタ。 A metal member forming a partially open ring and having a slope such that the thickness decreases from near the outer periphery of the ring toward the center; and a metal member surrounding and holding the metal member and having a rectangular outer periphery. 1. A filter for head and neck X-ray photography, comprising: a mounting plate having a shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1802681U JPS647359Y2 (en) | 1981-02-10 | 1981-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1802681U JPS647359Y2 (en) | 1981-02-10 | 1981-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57132300U JPS57132300U (en) | 1982-08-18 |
| JPS647359Y2 true JPS647359Y2 (en) | 1989-02-27 |
Family
ID=29816000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1802681U Expired JPS647359Y2 (en) | 1981-02-10 | 1981-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS647359Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715524Y2 (en) * | 1988-09-13 | 1995-04-12 | 株式会社モリタ製作所 | Dental panoramic cephalography system |
-
1981
- 1981-02-10 JP JP1802681U patent/JPS647359Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57132300U (en) | 1982-08-18 |
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