【考案の詳細な説明】〔産業上の利用分野〕 本考案はCT用頭部固定装置に関し、より詳し
くは被写体のCT撮影における複数の断層像をよ
り多く利用するCT用頭部固定装置に関するもの
である。[Detailed description of the invention] [Field of industrial application] The present invention relates to a head fixation device for CT, and more specifically, to a head fixation device for CT that makes more use of multiple tomographic images in CT imaging of a subject. It is.
従来、CT撮影時における頭部の固定は、ヘツ
ドレスト上にマジツクバンドで頭部を固定するこ
とによつて行われていた。 Conventionally, the head was fixed during CT imaging by fixing the head on a headrest with a magic band.
また、CT撮影とその撮影したものによる立体
像の構築は、基準となるものが無く、手術をする
医師の経験と感覚に頼る部分が多いものであつ
た。 Furthermore, there was no standard for CT imaging and the construction of a three-dimensional image from the images, and much of it relied on the experience and intuition of the surgeon performing the surgery.
さらに、頭頚部の骨の組成情況を示すための骨
塩量の測定については従来は適当な方法がなく測
定不可能であつた。 Furthermore, it has been impossible to measure bone mineral content, which is used to indicate the composition of bones in the head and neck, because there is no suitable method to date.
前記従来の、CT撮影時におけるヘツドレスト
上にマジツクバンドで額部を固定するのみの頭部
固定方法は、その撮影の度に断層部位がずれてし
まう欠点があり、手術前と手術後との比較がうま
くできないので病態の進行状況が正確に判別でき
ないという問題点があつた。 The conventional method of fixing the head, which involves simply fixing the forehead with a magic band on the headrest during CT imaging, has the disadvantage that the tomographic region shifts each time the CT scan is taken, making it difficult to compare before and after surgery. There was a problem that the progress of the disease could not be accurately determined because it was not performed well.
また、前記従来の立体像の構築は、医師の経験
と感覚に頼るいわゆる熟練を要する部分が多いこ
とから、総ての術者が正確を期すことは困難であ
るという問題点があつた。 In addition, the construction of the conventional three-dimensional image has many parts that require so-called skill, which relies on the doctor's experience and sense, so there is a problem in that it is difficult for all surgeons to ensure accuracy.
さらに、前記頭頚部の骨の組成状況を調べるた
めの骨塩量の測定は、従来正確に測定できる良い
方法が無かつたので、骨の生長老化のメカニズム
などがよく分からないという問題点があつた。 Furthermore, since there has been no good method for accurately measuring bone mineral content to investigate the bone composition of the head and neck, there is a problem in that the mechanism of bone aging is not well understood. Ta.
本考案はこのような問題点を解決することを目
的とする。 The present invention aims to solve these problems.
上記目的を達成するため、本考案は次のような
CT用頭部固定装置を提供する。すなわち本考案
は、被検者の頭部に装着する頭部装着部と、CT
用寝台のヘツドレストに固定され、且つこの頭部
装着部を前記ヘツドレストに固定する頭部装着部
固定具とを備えたCT用頭部固定装置であつて、
前記頭部装着部は、二つの基準軸が基準連結部を
介して傾斜状に且つスライド可能に連結され、こ
の基準連結部には連結可動部が連結され、生体の
複数の平面的断層像を重ね合わせて立体像を構築
する基準となる立体像構築用基準軸手段と、前記
複数の断層像を得るためのCT撮影の位置ぎめを
する断層位置決定軸手段と、頭頸部のCT撮影時
に既知の骨塩量を有する骨塩等価物質を同時に
CT撮影することにより頭頸部の骨塩量を比較算
出できる骨塩定量分析手段とを有することを特徴
とするCT用頭部固定装置である。 In order to achieve the above purpose, this invention has the following features.
Provides a head fixation device for CT. In other words, the present invention consists of a head-mounted part that is attached to the subject's head, and a CT
A head fixing device for CT, comprising: a head mounting part fixing device fixed to a head rest of a bed for use in CT; and a head mounting part fixing device fixing the head mounting part to the head rest;
In the head-mounted part, two reference axes are connected in a tilted and slidable manner via a reference connection part, and a movable connection part is connected to the reference connection part, so that the two reference axes are connected to each other in a slidable manner through a reference connection part, and a movable connection part is connected to the reference connection part. a reference axis means for constructing a three-dimensional image, which serves as a reference for constructing a three-dimensional image by superimposing the plurality of tomographic images; a tomographic position determining axis means for positioning CT imaging to obtain the plurality of tomographic images; Bone mineral equivalent material with a bone mineral content of
This head fixation device for CT is characterized by having a bone mineral quantitative analysis means that can comparatively calculate the amount of bone mineral in the head and neck by performing CT imaging.
上記構成において頭部装着部固定具は、CT用
寝台のヘツドレスト側にあつて前記頭部装着部を
固定することによつて被検者の頭部をヘツドレス
トに固定し、CT撮影で複数の断層像を得る間の
時間的推移に伴う被写体の位置変動を防止する作
用がある。 In the above configuration, the head-mounted part fixing device is located on the headrest side of the CT bed, and fixes the head-mounted part to the headrest, thereby fixing the subject's head to the headrest, and fixing the subject's head to the headrest. This has the effect of preventing the subject's position from changing over time during image acquisition.
また、前記頭部装着部の立体像構築用基本軸手
段は、CTによつて得られた平面的なフイルムに
おける平面状の断層像図形を積み重ね、生体の立
体像を構築する場合に、その積み重ね方向位置を
特定する基準となる機能を有するもので、立体像
構築時にはこの軸機能によつて前記複数の断層像
の積み重ねが行われる。 In addition, the basic axis means for constructing a three-dimensional image of the head-mounted part is used to stack planar tomographic images on a planar film obtained by CT, and when constructing a three-dimensional image of a living body, the It has a function as a reference for specifying the directional position, and when constructing a three-dimensional image, the plurality of tomographic images are stacked by this axis function.
さらに、前記頭部装着部の断層位置決定軸手段
は、複数の平面状の断層像を得るための位置決め
をする機能を有するので、この機能により、複数
の各断層像撮影位置が明確に決定され、その決定
による位置で各断層像が撮影され、CT撮影の度
に同一関係位置で断層像を視認することができ
る。 Further, since the tomographic position determining axis means of the head-mounted part has a positioning function for obtaining a plurality of planar tomographic images, this function allows each of the plurality of tomographic imaging positions to be clearly determined. , each tomographic image is taken at the determined position, and the tomographic image can be visually recognized at the same related position each time CT imaging is performed.
前記立体像構築用基本軸手段とこの断層位置決
定軸手段との両者は像を立体的に再現し、正確な
立体像を構築することができるとともに、同一関
係位置で断層像を視認することができる。 Both the basic axis means for constructing a three-dimensional image and this tomographic position determining axis means are capable of three-dimensionally reproducing an image, constructing an accurate three-dimensional image, and making it possible to visually recognize a tomographic image at the same relative position. can.
その上、骨塩定量分析手段は、既知のものと未
知の被検部とを同一画面上に同時にCT撮影して
あらわすので、撮影時の環境条件を同一にして比
較判断の誤差要因を排除することによつて、骨塩
量を正確に比較算出可能とする。 Furthermore, since the bone mineral quantitative analysis method simultaneously images CT images of known and unknown test areas on the same screen, the environmental conditions at the time of imaging are the same, eliminating sources of error in comparative judgments. This makes it possible to accurately compare and calculate bone mineral content.
本考案の実施例について、以下図面にしたがつ
て本考案の構成が実際上どのように具体化される
かをその作用とともに説明する。 Regarding embodiments of the present invention, how the configuration of the present invention is actually embodied will be described below with reference to the drawings, together with its operation.
第１図は本考案の一実施例の概要説明図で、図
中、１はCT用寝台、２はこのCT用寝台の上のヘ
ツドレストで、このヘツドレスト２には頭部装着
固定具３が取り付けられている。 FIG. 1 is a schematic explanatory diagram of one embodiment of the present invention. In the figure, 1 is a CT bed, 2 is a head rest on the CT bed, and a head-mounted fixture 3 is attached to the head rest 2. It is being
また、前記CT用寝台上には、被検者Ｍが頭部
Ｈを前記ヘツドレスト２内に収め、上向きに横臥
している。 Further, on the CT bed, a subject M is lying with his head H in the head rest 2 facing upward.
この被検者の頭部Ｈには、頭部装着部４がヘツ
ドバンド５によつて取り付けられ、下顎Ｕは、こ
のヘツドバンド５に取り付けられたゴム紐６で牽
引されるカツプ７でその動きを固定さる。 A head attachment part 4 is attached to the subject's head H by a headband 5, and the movement of the lower jaw U is fixed by a cup 7 pulled by a rubber string 6 attached to the headband 5. Monkey.
この頭部装着部４は、被検者Ｍの耳Ｅの位置で
頭部Ｈとの位置決めが行われ、頭部装着部４は頭
部装着部固定具３に前記位置決めされた耳Ｅの位
置で、相互に連結される。 This head-mounted part 4 is positioned with the head H at the position of the ear E of the subject M, and the head-mounted part 4 is attached to the head-mounted part fixture 3 at the position of the ear E that has been positioned. and are interconnected.
第２図は、本考案の一実施例の斜視図で、頭部
装着部４は、立体像構築用基準軸手段８と、断層
位置決定軸手段９と、骨塩定量分析手段１０とを
備えており、頭部装着部固定具３によりヘツドレ
スト２に装着されている。 FIG. 2 is a perspective view of an embodiment of the present invention, in which the head-mounted part 4 includes a reference axis means 8 for constructing a three-dimensional image, a tomographic position determining axis means 9, and a bone mineral quantitative analysis means 10. The headrest 2 is attached to the headrest 2 by a head mount fixture 3.
この頭部装着部４の立体像構築用基準軸手段８
は、金属の目盛り８ａを有する二つの基準軸８
ｂ，８ｂが基準軸連結部８ｃを介して傾斜状に、
かつ、スライド可能に連結され、この基準軸連結
部８ｃには連結可動部８ｄが装着されている。 Reference axis means 8 for constructing a three-dimensional image of the head mounted portion 4
are two reference axes 8 having metal scales 8a.
b, 8b are inclined through the reference shaft connecting portion 8c,
The reference shaft connecting portion 8c is slidably connected, and a movable connecting portion 8d is attached to the reference shaft connecting portion 8c.
前記基準軸８ｂ，８ｄの金属の目盛り８ａは、
Ｘ線のCT撮影時における頭部の断層位置が明確
に読めるようにしたものである。 The metal scales 8a of the reference shafts 8b and 8d are as follows:
This allows the tomographic position of the head to be clearly read during X-ray CT imaging.
また前記基準軸連結部８ｃは目盛り８ｅを有
し、左右の位置が確認出来るようになつている。 Further, the reference shaft connecting portion 8c has a scale 8e, so that the left and right positions can be confirmed.
連結可動部８ｄは下部がヘツドバンド５に着脱
できるようになつていて頭部Ｈと立体像構築用基
準軸手段８とを固定している。 The movable connecting portion 8d has a lower portion that can be attached to and detached from the head band 5, and fixes the head H and the reference axis means 8 for constructing a three-dimensional image.
その立体像構築用基準軸手段８には断層位置決
定軸手段９がとりつけられている。 A tomographic position determining axis means 9 is attached to the three-dimensional image construction reference axis means 8.
この断層位置決定軸手段９は上部目盛り９ａと
側部目盛り９ｂを有し、且つ下端９ｃは小さな凸
状（図示せず）部分が耳Ｅに装着されて頭部との
位置を確定し、その外側から頭部装着部固定具３
で連結されることによつて、断層位置決定軸手段
９はヘツドレスト２に固定されている。 This tomographic position determining axis means 9 has an upper scale 9a and a side scale 9b, and a small convex portion (not shown) at the lower end 9c is attached to the ear E to determine the position with the head. Head attachment fixture 3 from the outside
The slice position determining shaft means 9 is fixed to the headrest 2 by being connected to the head rest 2.
また立体像構築用基準手段８には、下顎Ｕ附近
に骨塩定量分析手段１０をスライド可能にとりつ
けている。 Further, a bone mineral quantitative analysis means 10 is slidably attached to the three-dimensional image construction reference means 8 near the lower jaw U.
この骨塩定量分析手段１０は、濃度の異なる既
知の骨塩をそれぞれ収納した複数の容器１０ａに
よつて構成され、頭頚部分CT撮影時に同時に撮
影することによつて頭頚部の骨塩量を正しく比較
できるようになつている。 This bone mineral quantitative analysis means 10 is composed of a plurality of containers 10a each containing known bone minerals with different concentrations, and the amount of bone mineral in the head and neck can be measured by simultaneously taking CT images of the head and neck area. Now you can compare correctly.
第３図は、本考案の頭部装着部固定具３の斜視
図で、基板３ａに取り付けられた下部固定板３ｂ
はヘツドレストの下部に固定されるものであり、
基板３ａの上部にとりつけられた下部固定板３ｂ
はヘツドレストの下部に固定されるものであり、
基板３ａの上部にとりつけられた左右にコの字状
に屈折させたものは側部固定板３ｃで、これらヘ
ツドレストの左右の側部に固定されるものであ
る。 FIG. 3 is a perspective view of the head-mounted part fixing device 3 of the present invention, in which the lower fixing plate 3b is attached to the base plate 3a.
is fixed to the bottom of the headrest,
Lower fixing plate 3b attached to the upper part of the board 3a
is fixed to the bottom of the headrest,
Side fixing plates 3c are attached to the upper part of the substrate 3a and are bent in a U-shape to the left and right, and are fixed to the left and right sides of these headrests.
また、基板３ａには、左右に屈折した装着アー
ム３ｄ，３ｄが可動回転板３ｅによつて連結部材
３ｆ，３ｆを介して左右に可動可能に取り付けら
れ、その先端３ｇは、断層位置決定軸手段９の先
端９ｃを外側から連結固定する。 Further, mounting arms 3d, 3d bent to the left and right are attached to the substrate 3a so as to be movable left and right by a movable rotary plate 3e via connecting members 3f, 3f, and the distal end 3g thereof is connected to a tomographic position determining shaft means. The tips 9c of 9 are connected and fixed from the outside.
以上のようにして、頭部Ｈはヘツドレスト２に
固定され、頭部Ｈの耳Ｅの位置を基本として位置
決めされた断層位置決定軸手段９により、前記固
定された頭部Ｈの複数の断層位置を目盛りを利用
し数値的に特定して、正確にCT撮影を行い、こ
れを立体像に復元する際は、前記立体像構築用基
準軸手段８により、その複数のCT撮影による平
面的な断層像を正確な位置に重ね合わせてもとの
立体像を再現的に構築することができる。 As described above, the head H is fixed to the head rest 2, and the tomographic position determining axis means 9, which is positioned based on the position of the ear E of the head H, allows the plurality of tomographic positions of the fixed head H to be determined. When specifying numerically using a scale and accurately performing CT imaging, and restoring this to a three-dimensional image, the three-dimensional image construction reference axis means 8 is used to create a planar tomographic image obtained by the plurality of CT imaging. By superimposing the images at precise positions, the original three-dimensional image can be reproducibly constructed.
また、前記立体像構築用基本軸手段８の下顎Ｕ
附近には、スライド可能な異なる濃度の既知の骨
塩を複数個配して同時に撮影することにより、頭
頚部の骨塩量を既知のものと比較して、正確に測
定出来るようにしたものである。 Further, the lower jaw U of the basic axis means 8 for constructing a three-dimensional image
By placing multiple pieces of known bone mineral with different concentrations that can be slid nearby and simultaneously photographing them, it is possible to accurately measure the amount of bone mineral in the head and neck by comparing it with known bone minerals. be.
以上本考案によれば、被検者の頭部に装着する
頭部装着部とこの頭部装着部をヘツドレストに固
定する頭部装着部固定具とを備えたので、頭部を
固定することにより、CT撮影時における被写体
位置の時間的変動を抑えることができる。したが
つて手術前と手術後との比較が明確になり、患部
の術後の治癒状況などが正確に判断できるように
なつた。 As described above, the present invention includes a head-mounted part to be attached to the subject's head and a head-mounted part fixture to fix the head-mounted part to the headrest. , it is possible to suppress temporal fluctuations in the subject position during CT imaging. Therefore, comparisons between before and after surgery have become clearer, and it has become possible to accurately judge the healing status of the affected area after surgery.
また、生体の複数の平面的な断層像を重ね合わ
せて立体像を構築する基準となる立体像構築用基
準軸手段を有するので、CT撮影で得られた複数
の断層像を積み重ねる基準点が明確になり、立体
像を容易に正確に構築することができる。 In addition, it has a reference axis means for constructing a three-dimensional image, which serves as a reference for constructing a three-dimensional image by superimposing multiple two-dimensional tomographic images of a living body, so there is a clear reference point for stacking multiple tomographic images obtained by CT imaging. This makes it possible to easily and accurately construct 3D images.
この立体像を容易に正確に構築することができ
ること、即ち画像の三次元再構築を正確にできる
ことにより、被検者の頭部の病体の把握、病巣の
位置及び大きさを診断及び治療の時に、正確に把
握でき適切な治療がなされる。同時に頭部におけ
る他の臓器の相互位置関係が明確に把握でき、手
術方法が決定できる。 By being able to easily and accurately construct this 3D image, that is, by accurately reconstructing the 3D image, it is possible to understand the diseased body of the subject's head, and the location and size of the lesion during diagnosis and treatment. , so that it can be accurately determined and appropriate treatment can be given. At the same time, the mutual positional relationship of other organs in the head can be clearly understood, and the surgical method can be determined.
さらに、前記複数の断層象を得るためのCT撮
影の位置決めをする断層位置決定軸手段を有する
ので、各断層撮影が明確に決定され、その検定に
よる位置で各断層像が撮影され、CT撮影の度に
同一関係位置で、断層像を視認することができ
る。 Furthermore, since it has a tomographic position determining axis means for positioning CT imaging to obtain the plurality of tomographic images, each tomographic image is clearly determined, each tomographic image is taken at the position determined by the verification, and the CT imaging is The tomographic images can be visually recognized at the same relative position at the same time.
そのうえ、濃度の異なる骨塩等価物質を同時に
撮影することにより頭頚部の骨塩量を正確に比較
算出できる骨塩定量分析手段を有するので、被写
体の頭頚部と骨塩量の既知の骨塩等価物質とを同
時にCT撮影することにより、撮影の環境条件を
同一にして撮影による誤差を排除し、骨塩量の比
較判断を容易かつ正確に行うことができ、骨の生
長老化のメカニズムの解明に役立つ、などの効果
がある。 In addition, it has a bone mineral quantitative analysis means that can accurately compare and calculate the amount of bone mineral in the head and neck by simultaneously photographing bone mineral equivalent materials with different concentrations, so it is possible to accurately compare and calculate the amount of bone mineral in the head and neck. By performing CT imaging of the material and the substance at the same time, the environmental conditions for imaging are the same and errors caused by imaging are eliminated, making it possible to easily and accurately compare and judge bone mineral content, and to elucidate the mechanism of bone aging. It has the effect of being helpful.
第１図は本考案の一実施例概要説明図、第２図
は同実施例の斜視図、第３図は同実施例の頭部装
着部固定部の斜視図である。 ４……頭部装着部、８……立体像構築用基準軸
手段、８ｂ……基準軸、８ｃ……基準軸連結部、
８ｄ……連結可動部、９……断層位置決定軸手
段、１０……骨塩定量分析手段。 FIG. 1 is a schematic explanatory diagram of one embodiment of the present invention, FIG. 2 is a perspective view of the same embodiment, and FIG. 3 is a perspective view of a head mounting portion fixing portion of the same embodiment. 4...Head mounting part, 8...Reference axis means for constructing a three-dimensional image, 8b...Reference axis, 8c...Reference axis connection part,
8d... Connecting movable part, 9... Fault position determining axis means, 10... Bone mineral quantitative analysis means.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987048461UJPH0423531Y2 (en) | 1987-03-31 | 1987-03-31 |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987048461UJPH0423531Y2 (en) | 1987-03-31 | 1987-03-31 |
| Publication Number | Publication Date |
|---|---|
| JPS63156608U JPS63156608U (en) | 1988-10-14 |
| JPH0423531Y2true JPH0423531Y2 (en) | 1992-06-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987048461UExpiredJPH0423531Y2 (en) | 1987-03-31 | 1987-03-31 |
| Country | Link |
|---|---|
| JP (1) | JPH0423531Y2 (en) |
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|---|---|---|---|---|
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| JPS6194639A (en)* | 1984-10-15 | 1986-05-13 | ラウリ ライテイネン | Adaptor |
| Publication number | Publication date |
|---|---|
| JPS63156608U (en) | 1988-10-14 |
| Publication | Publication Date | Title |
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