JPH10305029A - Cradle adapter - Google Patents
Cradle adapterInfo
- Publication number
- JPH10305029A JPH10305029A JP9116818A JP11681897A JPH10305029A JP H10305029 A JPH10305029 A JP H10305029A JP 9116818 A JP9116818 A JP 9116818A JP 11681897 A JP11681897 A JP 11681897A JP H10305029 A JPH10305029 A JP H10305029A
- Authority
- JP
- Japan
- Prior art keywords
- cradle
- adapter
- subject
- head
- radiation
- 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
- 230000005855 radiation Effects 0.000 abstract description 27
- 238000001514 detection method Methods 0.000 description 13
- 238000002591 computed tomography Methods 0.000 description 9
- 244000287353 Crassocephalum crepidioides Species 0.000 description 5
- 206010016322 Feeling abnormal Diseases 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000001959 radiotherapy Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Apparatus For Radiation Diagnosis (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、X線やγ線等の放
射線を用いたCT(Computed Tomography)装置を治療計画
機として用いる際に、クレードル上に設けることによ
り、平らな被検体載置面を提供するクレードルアダプタ
(フラットパッド)に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat mounting of a subject by providing a CT (Computed Tomography) device using radiation such as X-rays or γ-rays on a cradle when used as a treatment planning machine. Cradle adapter to provide surface
(Flat pad).
【０００２】[0002]
【従来の技術】放射線治療装置を用いて治療を行なう場
合、まず、専用の装置またはCT装置を用いて、被検体の
体表に設けたマークと、体内の患部との位置関係を測定
し(以下、このマークと患部との位置関係を測定するこ
とを「治療計画」という)、次に、放射線治療装置で、
マークを基準にして患部へ放射線を放射して患部の治療
を行う。2. Description of the Related Art When performing a treatment using a radiotherapy apparatus, first, using a dedicated apparatus or a CT apparatus, a positional relationship between a mark provided on a body surface of a subject and an affected part in the body is measured ( Hereinafter, measuring the positional relationship between the mark and the affected area is referred to as a “treatment plan”).
The affected area is treated by emitting radiation to the affected area based on the mark.
【０００３】治療計画を行なう装置と、放射線治療装置
とが別であるので、治療計画を行なう装置での被検体の
姿勢と、放射線治療装置での被検体の姿勢とが同一でな
ければ、放射線治療装置で患部へ放射線を正確に放射で
きないことになる。[0003] Since the treatment planning device and the radiotherapy device are different from each other, if the posture of the subject in the treatment planning device and the posture of the subject in the radiation treatment device are not the same, the radiation treatment device is not used. The treatment device will not be able to accurately emit radiation to the affected area.
【０００４】一方、放射線治療装置の被検体載置面は平
面であるのに対し、CT装置のクレードルは幅が狭く、そ
の被検体載置面は被検体の姿勢を安定させるために、断
面形状が凹状となっている。[0004] On the other hand, the subject mounting surface of the radiotherapy apparatus is flat, whereas the cradle of the CT apparatus is narrow, and the subject mounting face has a sectional shape to stabilize the posture of the subject. Is concave.
【０００５】従って、CT装置で治療計画を行なう場合に
は、被検体が放射線治療装置上に載置された時、治療計
画機上でとった姿勢と同じ姿勢を容易に再現できるよう
に、図４に示すようなクレードルアダプタを用いてい
る。[0005] Therefore, when performing a treatment plan with a CT apparatus, when the subject is placed on the radiotherapy apparatus, the same posture as that taken on the treatment planning machine can be easily reproduced. A cradle adapter as shown in FIG.
【０００６】図において、１はクレードル、２はクレー
ドル１上に設けられ、長手方向に幅が一定で、平らな被
検体載置面を提供するクレードルアダプタである。４は
放射線Ｘを被検体３に向かって出射する放射線源、５は
被検体３を透過した放射線Ｘを検出する検出素子列であ
る。尚、この検出素子列５の両端には、放射線源４から
出射される放射線Ｘのうち、なにも透過しない放射線を
常時検出しているモニタ用検出素子６が設けられてい
る。In FIG. 1, reference numeral 1 denotes a cradle, and 2 denotes a cradle adapter provided on the cradle 1 and having a constant width in a longitudinal direction and providing a flat subject mounting surface. Reference numeral 4 denotes a radiation source that emits the radiation X toward the subject 3, and 5 denotes a detection element array that detects the radiation X transmitted through the subject 3. Note that, at both ends of the detection element array 5, monitoring detection elements 6 that constantly detect radiation that does not transmit anything among the radiation X emitted from the radiation source 4 are provided.
【０００７】[0007]
【発明が解決しようとする課題】クレードル１にクレー
ドルアダプタ２を設け、平らな被検体載置面を提供する
場合、被検体３に不安感を与えないためにクレードルア
ダプタ２の幅はできるだけ広いことが望ましい。When the cradle 1 is provided with the cradle adapter 2 and a flat subject mounting surface is provided, the width of the cradle adapter 2 should be as large as possible so as not to give the subject 3 an uneasy feeling. Is desirable.
【０００８】しかし、図４に示すように、クレードルア
ダプタ２の幅(W)を広くしたり、クレードル１を下げた
りすると、モニタ用検出素子６に向かう放射線を遮って
しまう。However, as shown in FIG. 4, if the width (W) of the cradle adapter 2 is increased or the cradle 1 is lowered, radiation directed to the monitor detecting element 6 is blocked.
【０００９】一方、クレードル１は、治療計画を行なう
被検体の部位が、放射線源４の旋回中心になるように高
さが調整される。更に、クレードル１の最低高さは、仰
向けに載置された被検体３の体厚の一番厚い箇所である
頭部が治療計画できるような高さに決定され、この時の
クレードル１の高さでのクレードルアダプタ２がモニタ
用検出素子６に向かう放射線を遮らないようにクレード
ルアダプタ２の幅は設定される。On the other hand, the height of the cradle 1 is adjusted so that the part of the subject on which the treatment plan is made is located at the center of rotation of the radiation source 4. Further, the minimum height of the cradle 1 is determined so that the head, which is the thickest part of the subject 3 placed on the back, can plan treatment, and the height of the cradle 1 at this time is determined. The width of the cradle adapter 2 is set so that the cradle adapter 2 does not block the radiation directed to the monitor detection element 6.
【００１０】このため、被検体３で一番幅が広い胴部に
対するクレードルアダプタ２の幅が不十分となる問題点
がある。本発明は、上記問題点に鑑みてなされたもの
で、その目的は、被検体の体厚に応じてクレードルを上
下させても、クレードルアダプタがモニタ用検出素子に
向かう放射線を遮ることのないクレードルアダプタを提
供することにある。For this reason, there is a problem that the width of the cradle adapter 2 with respect to the torso of the subject 3 which is the widest becomes insufficient. The present invention has been made in view of the above problems, and an object of the present invention is to provide a cradle in which a cradle adapter does not block radiation directed to a monitor detection element even if the cradle is moved up and down according to the thickness of a subject. To provide an adapter.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決する本発
明は、CT装置を治療計画機として用いる際に、クレード
ル上に設けることにより、平らな被検体載置面を提供す
るクレードルアダプタであって、被検体の頭部が載置さ
れる狭幅部と、被検体の頭部以外の部分が載置され、前
記狭幅部より幅が広く設定された広幅部とから構成した
クレードルアダプタである。The present invention for solving the above problems is a cradle adapter which provides a flat subject mounting surface by being provided on a cradle when a CT apparatus is used as a treatment planning machine. A cradle adapter comprising a narrow portion on which the head of the subject is placed, and a wide portion on which a portion other than the head of the subject is placed and which is set wider than the narrow portion. is there.
【００１２】クレードルアダプタを被検体の頭部が載置
される狭幅部と、頭部以外の部分が載置される広幅部と
から構成したことにより、体厚の厚い頭部の治療計画を
行なうために、クレードルを頭部以外の部分の治療計画
を行なう場合よりも下げても、狭幅部がモニタ用検出素
子に向かう放射線を遮ることがない。Since the cradle adapter is composed of a narrow portion on which the head of the subject is placed and a wide portion on which parts other than the head are placed, a treatment plan for a thick head can be planned. Even if the cradle is lowered to perform the treatment planning for a portion other than the head, the narrow portion does not block the radiation directed to the monitor detection element.
【００１３】一方、頭部以外の部分、即ち、頭部に比べ
て体厚が薄い部分の治療計画を行なう場合には、頭部の
治療計画を行なう場合よりもクレードルを上げることが
でき、クレードルアダプタの幅が広くともモニタ用検出
素子に向かう放射線を遮ることがない。On the other hand, when planning treatment for a part other than the head, that is, a part whose body thickness is thinner than the head, the cradle can be raised more than when planning treatment for the head. Even if the width of the adapter is wide, it does not block the radiation directed to the monitoring detection element.
【００１４】このように、体厚の厚い頭部と、体厚の薄
い頭部以外の部分とで、クレードルアダプタの幅を変え
ることにより、モニタ用検出素子に向かう放射線を遮る
ことなく、十分な幅のクレードルアダプタを実現でき
る。As described above, by changing the width of the cradle adapter between the thick head and the portion other than the thin head, it is possible to sufficiently prevent radiation toward the monitor detection element. A cradle adapter with a width can be realized.
【００１５】ここで、前記狭幅部と、前記広幅部とは別
部品であることが望ましい。即ち、狭幅部と広幅部とを
別部品とすることにより、製造コストを低減することが
できる。Here, it is desirable that the narrow portion and the wide portion are separate parts. That is, manufacturing costs can be reduced by forming the narrow portion and the wide portion as separate components.
【００１６】尚、クレードルアダプタの構造としては、
外殻が放射線透過材料、例えば、ガラス繊維樹脂(FRP)
や、炭素繊維樹脂(CFRP)等で、内部に発泡ウレタン材を
充填したものが軽量化を図る点で好ましい。The structure of the cradle adapter is as follows:
The outer shell is made of a radiolucent material, for example, glass fiber resin (FRP)
A carbon fiber resin (CFRP) or the like, in which a foamed urethane material is filled, is preferable in terms of weight reduction.
【００１７】[0017]
【発明の実施の形態】次に図面を用いて本発明の実施の
形態を説明する。図１は本発明の一実施の形態例のクレ
ードルアダプタをX線CT装置に用いた時の斜視図であ
る。図において、被検体挿通穴１１が設けられたガント
リ１０内には、相対位置を保ったまま被検体挿通穴１１
のまわりを回転するX線源１２と、検出素子列１３とが
設けられている。検出素子列１３の両側には、X線源１
２から出射されるX線うち、なにも透過しないX線を常時
検出しているモニタ用検出素子１４が設けられている。Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective view when the cradle adapter according to one embodiment of the present invention is used in an X-ray CT apparatus. In the figure, in a gantry 10 provided with a subject insertion hole 11, the subject insertion hole 11 is maintained while maintaining the relative position.
An X-ray source 12 that rotates around and a detection element array 13 are provided. The X-ray source 1 is located on both sides of the detection element row 13.
A monitoring detecting element 14 that constantly detects X-rays that do not transmit anything among the X-rays emitted from 2 is provided.
【００１８】テーブル１５上には、ガントリ１０に向か
って移動可能なクレードル１７が設けられている。クレ
ードル１７上には、クレードルアダプタ２０が設けられ
る。このクレードルアダプタ２０は、被検体１６の頭部
１６ａが載置され、幅(W1)が他の部分の幅(W2)より狭く
設定された狭幅部２０ａと、被検体１６の頭部１６ａ以
外の部分が載置される広幅部２０ｂとからなっている。A cradle 17 movable toward the gantry 10 is provided on the table 15. A cradle adapter 20 is provided on the cradle 17. The cradle adapter 20 has a portion other than the narrow portion 20a on which the head 16a of the subject 16 is placed and whose width (W1) is set to be smaller than the width (W2) of the other portion, and the head 16a of the subject 16 And the wide portion 20b on which the portion is placed.
【００１９】尚、本実施の形態例のクレードルアダプタ
２０は、軽量化を図るために、外殻が放射線透過材料で
ある炭素繊維樹脂(CFRP)で、内部に同じく放射線透過材
料である発泡ウレタン材を充填した構造とした。The cradle adapter 20 of the present embodiment has a shell made of carbon fiber resin (CFRP), which is a radiation transmitting material, and a foamed urethane material, which is also a radiation transmitting material, for reducing the weight. Was filled.
【００２０】図２はクレードルアダプタ２０とクレード
ル１７との取付を説明する図である。図に示すように、
クレードルアダプタ２０の底面の両側部には、中央部２
０ｄより一段下がった凹部２０ｃが形成されている。FIG. 2 is a view for explaining how the cradle adapter 20 and the cradle 17 are attached. As shown in the figure,
The center part 2 is provided on both sides of the bottom of the cradle adapter 20.
A recess 20c one step lower than 0d is formed.
【００２１】クレードル１７上にはフック・アンド・ル
ープファスナのうちの一方のファスナ３０が、クレード
ルアダプタ２０の凹部２０ｃには、フック・アンド・ル
ープファスナの他方のファスナ３１が設けられている。
更に、クレードルアダプタ２０の中央部２０ｄには、ス
ポンジ３２が設けられている。One fastener 30 of the hook and loop fastener is provided on the cradle 17, and the other fastener 31 of the hook and loop fastener is provided in the concave portion 20 c of the cradle adapter 20.
Further, a sponge 32 is provided at a central portion 20d of the cradle adapter 20.
【００２２】従って、クレードルアダプタ２０をクレー
ドル１７上に載置した時点では、スポンジ３２の厚みに
よって、フック・アンド・ループファスナ３０,３１は
係合せず、クレードルアダプタ２０はクレードル１７上
で自由に移動可能である。Therefore, when the cradle adapter 20 is placed on the cradle 17, the hook and loop fasteners 30 and 31 are not engaged due to the thickness of the sponge 32, and the cradle adapter 20 freely moves on the cradle 17. It is possible.
【００２３】そして、クレードルアダプタ２０の位置決
めを行い、クレードルアダプタ２０上に被検体１６を載
置すると、被検体１６の体重により、スポンジ３２が圧
縮され、フック・アンド・ループファスナ３０,３１は
係合し、クレードルアダプタ２０は固定される。When the cradle adapter 20 is positioned and the subject 16 is placed on the cradle adapter 20, the sponge 32 is compressed by the weight of the subject 16, and the hook and loop fasteners 30, 31 are engaged. In this case, the cradle adapter 20 is fixed.
【００２４】次に、上記構成の動作を説明する。初期状
態では、クレードル１７はテーブル１５上に収容された
状態にある。このX線CT装置を用いて治療計画を行なう
場合には、先ず、クレードル１７上にクレードルアダプ
タ２０を載置すると共に、クレードルアダプタ２０の位
置決めを行なう。Next, the operation of the above configuration will be described. In an initial state, the cradle 17 is stored on the table 15. When performing a treatment plan using this X-ray CT apparatus, first, the cradle adapter 20 is placed on the cradle 17 and the cradle adapter 20 is positioned.
【００２５】被検体１６を放射線治療装置での姿勢と同
じ姿勢となるようにクレードルアダプタ２０上に載置す
る。このとき、被検体１６の体重により、クレードルア
ダプタ２０はクレードル１７に固定される。The subject 16 is placed on the cradle adapter 20 so as to be in the same posture as that of the radiation therapy apparatus. At this time, the cradle adapter 20 is fixed to the cradle 17 according to the weight of the subject 16.
【００２６】被検体１６の患部がガントリ１０の被検体
挿通穴１１内に位置するように、クレードル１７をガン
トリ１０の被検体挿通穴１１方向に移動させ、治療計画
を行なう。The cradle 17 is moved in the direction of the subject insertion hole 11 of the gantry 10 so that the affected part of the subject 16 is located in the subject insertion hole 11 of the gantry 10, and a treatment plan is performed.
【００２７】上記構成によれば、図３に示すように、被
検体１６の体厚の厚い頭部１６ａの治療計画を行なう際
には、頭部１６ａはクレードルアダプタ２０の狭幅部２
０ａ上に載置されているので、頭部１６ａ以外の部分が
載置される広幅部２０ｂでの治療計画時よりクレードル
１７を下げても、モニタ用検出素子１４に向かう放射線
を遮ることがない。According to the above configuration, as shown in FIG. 3, when planning the treatment of the thick head 16a of the subject 16, the head 16a is attached to the narrow portion 2 of the cradle adapter 20.
0a, so that even if the cradle 17 is lowered from the time of treatment planning at the wide portion 20b on which a portion other than the head 16a is placed, the radiation directed to the monitor detection element 14 is not blocked. .
【００２８】一方、被検体１６の頭部１６ａ以外の部
分、即ち、頭部１６ａに比べて体厚が薄い部分の治療計
画を行なう場合には、クレードル１７を上げることがで
きるので、広幅部２０ｂがモニタ用検出素子に向かう放
射線を遮ることはない。On the other hand, when planning a treatment of a portion other than the head 16a of the subject 16, that is, a portion having a smaller body thickness than the head 16a, the cradle 17 can be raised, so that the wide portion 20b Does not block radiation directed to the monitoring detector.
【００２９】このように、被検体１６の体厚の厚い頭部
１６ａと、体厚の薄い頭部１６ａ以外の部分とで、クレ
ードルアダプタ２０の幅を変えることにより、モニタ用
検出素子１４に向かう放射線を遮ることなく、十分な幅
のクレードルアダプタ２０を実現できる。As described above, by changing the width of the cradle adapter 20 between the thick head portion 16a of the subject 16 and the portion other than the thin head portion 16a, the subject 16 moves toward the monitor detecting element 14. The cradle adapter 20 having a sufficient width can be realized without blocking radiation.
【００３０】尚、本発明は、上記実施の形態例に限定す
るものではない。上記実施の形態例では、クレードルア
ダプタ２０は、狭幅部２０ａと、広幅部２０ｂとが一体
であったが、狭幅部２０ａと広幅部２０ｂとを分離し、
個別に製造できるようにしてもよい。The present invention is not limited to the above embodiment. In the above embodiment, the cradle adapter 20 has the narrow portion 20a and the wide portion 20b integrated with each other, but separates the narrow portion 20a and the wide portion 20b,
You may enable it to be manufactured individually.
【００３１】この場合、クレードルアダプタ２０のコス
トを低減することができる。In this case, the cost of the cradle adapter 20 can be reduced.
【００３２】[0032]
【発明の効果】以上述べたように本発明のクレードルア
ダプタによれば、クレードルアダプタを被検体の頭部が
載置される狭幅部と、頭部以外の部分が載置される広幅
部とから構成したことにより、体厚の厚い頭部の治療計
画を行なうために、クレードルを頭部以外の部分の治療
計画を行なう場合よりも下げても、狭幅部がモニタ用検
出素子に向かう放射線を遮ることがない。As described above, according to the cradle adapter of the present invention, the cradle adapter has a narrow portion on which the head of the subject is placed and a wide portion on which parts other than the head are placed. Even if the cradle is lowered to plan the treatment of parts other than the head in order to plan the treatment of the head with a thick body, even if the narrow portion is directed toward the monitor detecting element, Do not block.
【００３３】一方、頭部以外の部分、即ち、頭部に比べ
て体厚が薄い部分の治療計画を行なう場合には、頭部の
治療計画を行なう場合よりもクレードルを上げることが
でき、クレードルアダプタの幅が広くともモニタ用検出
素子に向かう放射線を遮ることがない。On the other hand, when a treatment plan for a part other than the head, that is, a part whose body thickness is thinner than the head, the cradle can be raised more than when the treatment plan for the head is made. Even if the width of the adapter is wide, it does not block the radiation directed to the monitoring detection element.
【００３４】このように、体厚の厚い頭部と、体厚の薄
い頭部以外の部分とで、クレードルアダプタの幅を変え
ることにより、モニタ用検出素子に向かう放射線を遮る
ことなく、十分な幅のクレードルアダプタを実現でき
る。As described above, by changing the width of the cradle adapter between the thick head and the portion other than the thin head, it is possible to sufficiently prevent radiation toward the monitor detection element without interrupting the radiation. A cradle adapter with a width can be realized.
【００３５】又、前記狭幅部と、前記広幅部とは別部品
とすることにより、製造コストを低減することができ
る。Further, by forming the narrow portion and the wide portion as separate parts, the manufacturing cost can be reduced.
【図１】本発明の一実施の形態例のクレードルアダプタ
をX線CT装置に用いた時の斜視図である。FIG. 1 is a perspective view when a cradle adapter according to an embodiment of the present invention is used in an X-ray CT apparatus.
【図２】図１に示すクレードルアダプタにクレードルへ
の取付を説明する図である。FIG. 2 is a diagram illustrating attachment of the cradle adapter shown in FIG. 1 to a cradle.
【図３】図１に示すクレードルアダプタの効果を説明す
る図である。FIG. 3 is a diagram illustrating the effect of the cradle adapter shown in FIG.
【図４】従来例を説明する図である。FIG. 4 is a diagram illustrating a conventional example.
１６ 被検体 １７ クレードル ２０クレードルアダプタ ２０ａ 狭幅部 ２０ｂ 広幅部 16 subject 17 cradle 20 cradle adapter 20a narrow portion 20b wide portion
Claims (2)
クレードル上に設けることにより、平らな被検体載置面
を提供するクレードルアダプタであって、 被検体の頭部が載置される狭幅部と、 被検体の頭部以外の部分が載置され、前記狭幅部より幅
が広く設定された広幅部と、 から構成したことを特徴とするクレードルアダプタ。When using a CT apparatus as a treatment planning machine,
A cradle adapter that provides a flat subject mounting surface by being provided on the cradle, and includes a narrow portion on which the head of the subject is mounted, and a portion other than the head of the subject. And a wide portion having a width wider than the narrow portion.
あることを特徴とする請求項１記載のクレードルアダプ
タ。2. The cradle adapter according to claim 1, wherein the narrow portion and the wide portion are separate parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9116818A JPH10305029A (en) | 1997-05-07 | 1997-05-07 | Cradle adapter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9116818A JPH10305029A (en) | 1997-05-07 | 1997-05-07 | Cradle adapter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10305029A true JPH10305029A (en) | 1998-11-17 |
Family
ID=14696401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9116818A Pending JPH10305029A (en) | 1997-05-07 | 1997-05-07 | Cradle adapter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10305029A (en) |
-
1997
- 1997-05-07 JP JP9116818A patent/JPH10305029A/en active Pending
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