JPH0324167Y2 - - Google Patents
Info
- Publication number
- JPH0324167Y2 JPH0324167Y2 JP1983166568U JP16656883U JPH0324167Y2 JP H0324167 Y2 JPH0324167 Y2 JP H0324167Y2 JP 1983166568 U JP1983166568 U JP 1983166568U JP 16656883 U JP16656883 U JP 16656883U JP H0324167 Y2 JPH0324167 Y2 JP H0324167Y2
- Authority
- JP
- Japan
- Prior art keywords
- ray
- patient
- top plate
- energy
- reference objects
- 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
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 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
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Description
【考案の詳細な説明】
(イ) 産業上の利用分野
この考案は、Ｘ線管やライナツク等の加速管等
を用いる放射線診療装置の患者用ベツドに関す
る。[Detailed description of the invention] (a) Industrial application field This invention relates to a bed for a patient in a radiological treatment apparatus that uses an X-ray tube, an acceleration tube such as a linac, or the like.
(ロ) 従来技術
この種の放射線診療装置において、放射線量の
変動のみならず放射線エネルギの変動を検出して
これを補正することは重要なことである。(B) Prior Art In this type of radiological treatment apparatus, it is important to detect and correct not only fluctuations in radiation dose but also fluctuations in radiation energy.
放射線診療装置の一例としてＸ線CT装置につ
き説明する。このＸ線CT装置ではＸ線管とＸ線
検出器とが被検者を間に挟んで対向配置され、Ｘ
線吸収に関するデータが収集され断層像が作成さ
れる。この装置では通常、Ｘ線量の変動に対処す
るため、被写体を透過しない一部のＸ線ビームを
較正用に用い、これによりデータを補正するよう
にしている。しかし、これではたしかにＸ線量の
変動の補正は行なえるが、Ｘ線エネルギの変動に
ついては何ら補正されない。 An X-ray CT device will be explained as an example of a radiological treatment device. In this X-ray CT device, an X-ray tube and an X-ray detector are placed facing each other with the subject in between.
Data regarding line absorption is collected and a tomographic image is created. In order to cope with variations in the X-ray dose, this apparatus usually uses a part of the X-ray beam that does not pass through the object for calibration, and uses this for correction of data. However, although this can certainly correct variations in X-ray dose, it does not correct variations in X-ray energy at all.
Ｘ線エネルギはＸ線管電圧に関連するので、普
通は、この管電圧を測定、調整することによつて
Ｘ線エネルギの調整が行なわれる。特にＸ線管を
交換するときなどには必ずこの調整が行なわれ
る。しかし、たとえ管電圧を再現性良く調整でき
たとしても個々のＸ線管に備えられた固有のフイ
ルタの厚みが製品ごとにばらつきを持つているた
めＸ線エネルギを再現性良く調整することは困難
である。 Since the x-ray energy is related to the x-ray tube voltage, the x-ray energy is normally adjusted by measuring and adjusting the tube voltage. This adjustment is always performed especially when replacing the X-ray tube. However, even if the tube voltage can be adjusted with good reproducibility, it is difficult to adjust the X-ray energy with good reproducibility because the thickness of the unique filter in each X-ray tube varies from product to product. It is.
ところで、Ｘ線CT装置の場合は普通、Ｘ線エ
ネルギがある一定の値（通常120KeV）であると
して、画像再構成ソフトウエアが作成されてい
る。そのためＸ線エネルギが変化するとCT値の
変化や画像の均一性不良等の画像の劣化が生じ
る。 By the way, in the case of an X-ray CT apparatus, image reconstruction software is usually created assuming that the X-ray energy is a certain value (usually 120 KeV). Therefore, when the X-ray energy changes, image deterioration such as a change in CT value or poor image uniformity occurs.
(ハ) 目的
この考案は、放射線診療装置における放射線エ
ネルギの変動を容易に検出することができ、放射
線エネルギの調整を容易化するのに役立つ患者用
ベツドを提供することを目的とする。(c) Purpose The purpose of this invention is to provide a bed for a patient that can easily detect fluctuations in radiation energy in a radiological treatment device and is useful for facilitating adjustment of radiation energy.
(ニ) 構成
この考案による放射線診療装置の患者用ベツド
は、患者が横たえられる天板と、該天板の端部に
設けられた上記患者の頭部を固定するためのヘツ
ドレストと、上記ヘツドレスト両脇において上記
天板端部に取り付けられた、放射線吸収係数のエ
ネルギ依存性の異なる少なくとも２種類の物質か
らそれぞれ構成される２個の参照物体とを有する
ことを特徴とする。(D) Structure The patient bed of the radiological treatment apparatus according to this invention includes a top plate on which a patient lies, a head rest provided at the end of the top plate for fixing the patient's head, and both of the head rests. The present invention is characterized in that it has two reference objects each made of at least two types of materials having different energy dependencies of radiation absorption coefficients, which are attached to the end of the top plate on the sides.
(ホ) 実施例
第１図において、患者用ベツドの天板１のヘツ
ドレスト２側の端部の両脇に参照物体４，５が埋
め込まれている。このヘツドレスト２は第２図
Ａ，Ｂに示すように患者（被検者）６の頭部を固
定するためのもので、金属等でなる取付具３によ
つて天板１の端部に取り付けられている。参照物
体４，５は、たとえばアルミニウムＡ１とアクリ
ルなどのＸ線吸収係数のエネルギ依存性が異なる
２種類の物質でそれぞれ構成されている。(E) Embodiment In FIG. 1, reference objects 4 and 5 are embedded on both sides of the end of the top plate 1 of a patient's bed on the headrest 2 side. This headrest 2 is for fixing the head of a patient (subject) 6 as shown in FIGS. 2A and B, and is attached to the end of the top plate 1 with a fixture 3 made of metal or the like. It is being The reference objects 4 and 5 are each made of two types of materials, such as aluminum A1 and acrylic, whose X-ray absorption coefficients have different energy dependencies.
第３世代のＸ線CT装置に適用する場合は、第
２図Ａ，Ｂのようになる。この第３世代のＸ線
CT装置では、この第２図Ａ，Ｂに示すように、
Ｘ線管７とＸ線検出器８とが患者６を挟んで対向
配置され、この患者６を中心にしてＸ線管７とＸ
線検出器８とが回転し、Ｘ線管７からフアンビー
ム状に照射されるＸ線ビームがＸ線検出器８の多
数配列された小さな検出素子の各々に入射する。
患者６を透過したＸ線ビームが入射することによ
りＸ線検出器８から出力される信号が図示しない
データ収集装置に送られ、Ｘ線吸収量に関するデ
ータが得られる。このデータは画像再構成装置
（図示しない）に送られて、フアンビーム状のＸ
線ビームでスキヤンされた断面におけるＸ線吸収
係数の分布像が断層像として再構成される。 When applied to a third generation X-ray CT device, it will be as shown in Figure 2 A and B. This third generation X-ray
In the CT device, as shown in Fig. 2 A and B,
An X-ray tube 7 and an X-ray detector 8 are arranged facing each other with a patient 6 in between.
The ray detector 8 rotates, and the X-ray beam irradiated from the X-ray tube 7 in the form of a fan beam is incident on each of a large number of small detection elements arranged in the X-ray detector 8.
When the X-ray beam transmitted through the patient 6 is incident, a signal output from the X-ray detector 8 is sent to a data acquisition device (not shown), and data regarding the amount of X-ray absorption is obtained. This data is sent to an image reconstruction device (not shown) to generate a fan-beam X
The distribution image of the X-ray absorption coefficient in the cross section scanned by the ray beam is reconstructed as a tomographic image.
この第３世代のＸ線CT装置においてＸ線エネ
ルギ測定を行なう場合、天板１を移動させてＸ線
ビームが参照物体４，５を通過するよう位置決め
する。参照物体４，５を透過したＸ線ビームが入
射することによつてＸ線検出器８からＸ線吸収量
（またはＸ線吸収係数）のデータが得られる。こ
れら参照物体４，５のデータをそれぞれIa，Ibと
すると、
Ia∝e-〓a When measuring X-ray energy in this third generation X-ray CT apparatus, the top plate 1 is moved to position the X-ray beam to pass through the reference objects 4 and 5. Data on the amount of X-ray absorption (or X-ray absorption coefficient) is obtained from the X-ray detector 8 by the incidence of the X-ray beam that has passed through the reference objects 4 and 5. If the data of these reference objects 4 and 5 are Ia and Ib, respectively, Ia∝e - 〓 a
Claims (1)
けられた上記患者の頭部を固定するためのヘツド
レストと、上記ヘツドレスト両脇において上記天
板端部に取り付けられた、放射線吸収係数のエネ
ルギ依存性の異なる少なくとも２種類の物質から
それぞれ構成される２個の参照物体とを有するこ
とを特徴とする放射線診療装置の患者用ベツド。 A top plate on which a patient lies, a head rest provided at the end of the top plate for fixing the patient's head, and a radiation absorption coefficient 1. A patient bed for a radiological treatment apparatus, comprising two reference objects each made of at least two types of substances having different energy dependencies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16656883U JPS6073506U (en) | 1983-10-27 | 1983-10-27 | Patient bed of radiology equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16656883U JPS6073506U (en) | 1983-10-27 | 1983-10-27 | Patient bed of radiology equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6073506U JPS6073506U (en) | 1985-05-23 |
| JPH0324167Y2 true JPH0324167Y2 (en) | 1991-05-27 |
Family
ID=30364635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16656883U Granted JPS6073506U (en) | 1983-10-27 | 1983-10-27 | Patient bed of radiology equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6073506U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000271114A (en) * | 1999-03-26 | 2000-10-03 | Toshiba Corp | Bed device |
| CN103477102A (en) * | 2011-03-22 | 2013-12-25 | Ntn株式会社 | Roller bearing, and travel device provided with roller bearing |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2360716C2 (en) | 2003-08-12 | 2009-07-10 | Лома Линда Юниверсити Медикал Сентер | Patient-aid modular system |
| EP2095374A4 (en) | 2006-11-21 | 2012-05-30 | Univ Loma Linda Med | Device and method for immobilizing patients for breast radiation therapy |
| JP5546397B2 (en) * | 2010-09-14 | 2014-07-09 | 三菱電機株式会社 | Radiation therapy couch top and radiation therapy couch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5353993A (en) * | 1976-10-26 | 1978-05-16 | Alderson Res Lab | Scanning tomograph tester |
| JPS5422192A (en) * | 1977-07-21 | 1979-02-19 | Toshiba Corp | Computer tomography device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0119932Y2 (en) * | 1978-01-19 | 1989-06-09 |
-
1983
- 1983-10-27 JP JP16656883U patent/JPS6073506U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5353993A (en) * | 1976-10-26 | 1978-05-16 | Alderson Res Lab | Scanning tomograph tester |
| JPS5422192A (en) * | 1977-07-21 | 1979-02-19 | Toshiba Corp | Computer tomography device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000271114A (en) * | 1999-03-26 | 2000-10-03 | Toshiba Corp | Bed device |
| CN103477102A (en) * | 2011-03-22 | 2013-12-25 | Ntn株式会社 | Roller bearing, and travel device provided with roller bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6073506U (en) | 1985-05-23 |
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