JPH0673315B2 - CT scanner - Google Patents
CT scannerInfo
- Publication number
- JPH0673315B2 JPH0673315B2 JP2125330A JP12533090A JPH0673315B2 JP H0673315 B2 JPH0673315 B2 JP H0673315B2 JP 2125330 A JP2125330 A JP 2125330A JP 12533090 A JP12533090 A JP 12533090A JP H0673315 B2 JPH0673315 B2 JP H0673315B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- load
- power supply
- secondary battery
- scanner
- 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 - Fee Related
Links
- 238000002591 computed tomography Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
Landscapes
- X-Ray Techniques (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、被検者をCTスキャンしてデータ収集し、CT画
像を再構成するCTスキャナに関し、特に電源設備の改良
に関する。Description: [Object of the Invention] (Industrial field of application) The present invention relates to a CT scanner for reconstructing a CT image by collecting data by performing a CT scan on a subject, and particularly an improvement of power supply equipment. Regarding
（従来の技術） 従来、Ｘ線CTスキャナ等のCTスキャナに設置されている
電源設備は、Ｘ線管等の撮影手段や架台、寝台等の駆動
系の如くスキャン時に大電力を消費するユニットへ電力
供給する際、商用電源から受けた電力を直接的に上記大
電力を消費するユニツトへ供給するものであった。(Prior Art) Conventionally, the power supply equipment installed in a CT scanner such as an X-ray CT scanner is a unit that consumes a large amount of power during scanning, such as an imaging means such as an X-ray tube or a drive system such as a gantry or a bed. At the time of supplying electric power, the electric power received from the commercial power source was directly supplied to the unit that consumes the large electric power.
そのため、従来のCTスキャナは、スキャン時に非スキャ
ン時の約十倍から数十倍のピーク電力をまかなうことを
考慮して電源設備を大電力容量の構成にしていた。Therefore, in the conventional CT scanner, the power supply facility has a large power capacity configuration in consideration of supplying about 10 to several tens of times as much peak power as during non-scan during scanning.
（発明が解決しようとする課題） 従って、従来のCTスキャナの場合においては、大電力容
量の電源設備とするために電源ケーブルの定格をスキャ
ン時のピーク電力に対応したものとするなど設備費用が
かさみ、また電力会社に対する電力使用契約上も不利で
あった。(Problems to be solved by the invention) Therefore, in the case of the conventional CT scanner, the equipment cost such as the rating of the power cable corresponding to the peak power at the time of scanning in order to have the power equipment with a large power capacity is required. It was also disadvantageous in terms of power usage contracts with power companies.
しかも、CTスキャナにおいて実際にスキャンする時間
は、１日当りの稼動時間が８時間であり、この８時間中
で200スキャン行うとしても、１スキャン当り３秒で合
計600秒（10分）程度であるから、従来の如くの大電力
容量の電源設備を用いた場合には、設備利用効率の観点
で非常に割高なものとなる。Moreover, the actual scanning time of the CT scanner is 8 hours per day, and even if 200 scans are performed within these 8 hours, 3 seconds per scan will total about 600 seconds (10 minutes). Therefore, when a conventional power supply facility with a large power capacity is used, it is extremely expensive in terms of facility utilization efficiency.
本発明は、係る事情に着目してなされたもので、その目
的とするところは、商用電源の電源容量を大幅に下げて
もスキャン時のピーク電力に対応し得るCTスキャナを提
供することにある。The present invention has been made in view of such circumstances, and an object thereof is to provide a CT scanner that can cope with peak power during scanning even if the power supply capacity of a commercial power supply is significantly reduced. .
［発明の構成］ （課題を解決するための手段） 上記目的を達成するため本発明は、被検者をCTスキャン
してデータ収集し、CT画像を再構成するCTスキャナにお
いて、スキャン時に大電力を消費するＸ線管を有する第
１の負荷と、この第１の負荷に対し電力を供給する商用
電源と、前記第１の負荷若しくは前記商用電源のいずれ
かに接続され、前記第１の負荷への大電力の供給若しく
は自己の充電を行う２次電池と、前記Ｘ線管の動作時
は、前記２次電池をこの第１の負荷側に接続して大電力
を供給し、前記Ｘ線管の非動作時は、前記２次電池を前
記商用電源側に接続して充電するよう切換える切換手段
と、前記商用電源に直接又は整流回路を介して接続さ
れ、スキャン休止間に小電力を消費する第２の負荷と、
を有することが特徴である。[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a CT scanner that CT-scans a subject, collects data, and reconstructs a CT image with high power consumption during scanning. Connected to either the first load or the commercial power source, a first load having an X-ray tube that consumes energy, a commercial power source that supplies power to the first load, and the first load. When the X-ray tube and the secondary battery that supplies a large amount of electric power to the device or charges itself are supplied with the secondary battery, the secondary battery is connected to the first load side to supply a large amount of electric power to the X-ray tube. When the tube is not in operation, the secondary battery is connected to the commercial power source side to switch to charge the battery, and the commercial power source is connected directly or via a rectifier circuit to consume a small amount of power during a scan pause. A second load to
Is characterized by having.
（作用） 本発明によるCTスキャナの構成であれば、大電力を消費
する負荷におけるスキャン時のピーク電力を２次電池で
全てもしくは一部をまかなえる電源設備にし得るので、
商用電源の電源容量を従来に比して大幅に小さくするこ
とができる。(Operation) With the configuration of the CT scanner according to the present invention, it is possible to provide a power supply facility in which a secondary battery can fully or partially cover the peak power during scanning in a load that consumes a large amount of power.
The power supply capacity of the commercial power supply can be significantly reduced as compared with the conventional one.
（実施例） 第１図および第２図は、本発明が適用されたCTスキャナ
における電源設備のそれぞれ実施例を示す構成図であ
る。(Embodiment) FIG. 1 and FIG. 2 are configuration diagrams showing respective embodiments of power supply equipment in a CT scanner to which the present invention is applied.
第１図に示す一実施例の電源設備は、商用電源１の交流
電力が整流回路２により直流電力に変換され、整流回路
２と第１のユニツト３との間に設けた切換操作部４が整
流回路２側を選択したとき、整流回路２からの直流電力
が２次電池５に供給され、切換操作部４が第１のユニツ
ト３側を選択したとき、２次電池５を電力供給源として
第１のユニツト３への給電がなされる充放電回路が形成
されているものである。そして、整流回路２からの直流
電力が第２のユニツト６へ直接給電されるものである。
但し、切換操作部４における整流回路２側の選択は、非
スキャン時に実行され、第１のユニツト３側の選択は、
スキャン時に実行されるもので、これらの実行は、図示
しないコントーラの非スキャン及びスキャン動作のタイ
ミングに同期してなされる。In the power supply equipment of one embodiment shown in FIG. 1, the AC power of the commercial power supply 1 is converted into DC power by the rectifier circuit 2, and the switching operation unit 4 provided between the rectifier circuit 2 and the first unit 3 is provided. When the rectifier circuit 2 side is selected, the DC power from the rectifier circuit 2 is supplied to the secondary battery 5, and when the switching operation unit 4 selects the first unit 3 side, the secondary battery 5 is used as a power supply source. A charging / discharging circuit for supplying power to the first unit 3 is formed. Then, the DC power from the rectifier circuit 2 is directly supplied to the second unit 6.
However, the selection on the side of the rectifier circuit 2 in the switching operation unit 4 is executed during non-scanning, and the selection on the side of the first unit 3 is
These operations are executed at the time of scanning, and these operations are executed in synchronization with the timing of non-scanning and scanning operation of a controller (not shown).
第２図に示す他実施例の電源設備は、整流回路２と第１
のユニツト３との間に、切換操作部を介在することなく
挿入配置されており、これにより整流回路２からの直流
電力が２次電池５に常時連続して供給されるとともに、
スキャン時に整流回路２からの直流電力及び２次電池５
からの直流電力が重畳されて第１のユニツト３への給電
がなされる充放電回路が形成されているものである。そ
して、商用電源１からの交流電力が第２のユニツト６へ
直接給電されるものである。The power supply equipment of another embodiment shown in FIG.
It is inserted and arranged between the unit 3 and the unit 3 without interposing a switching operation unit, whereby the DC power from the rectifier circuit 2 is always continuously supplied to the secondary battery 5.
DC power from the rectifier circuit 2 and secondary battery 5 during scanning
The charging / discharging circuit is formed by superimposing the DC power from the power supply unit to supply power to the first unit 3. Then, the AC power from the commercial power source 1 is directly fed to the second unit 6.
なお、第１図及び第２図において、第１のユニツト３
は、Ｘ線管等スキャン時に大電力を消費する各ユニツト
を総称で示しているものであり、また第２のユニツト
は、スキャン及び非スキャンに関係なくほぼ一定の電力
を消費する各ユニツトを総称で示しているものである。In addition, in FIG. 1 and FIG. 2, the first unit 3
Is a generic term for each unit that consumes a large amount of power during scanning such as an X-ray tube, and the second unit is a generic term for each unit that consumes a substantially constant amount of power regardless of scanning or non-scanning. It is shown in.
このような各実施例の電源設備は、例えば第３図に示す
如くの外観を呈するＸ線CTスキャナに適用することがで
きる。なお、このＸ線CTスキャナは、チルト駆動される
架台７と、この架台７に対して被検者Ｐを挿入移動させ
たり高さ調整したりする寝台８とを備えている。そし
て、架台７は、Ｘ線管９とＸ線検出器10とが装備されて
いて、これらを被検者Ｐを中心として回転移動させなが
ら被検者Ｐに対するスキャン動作をなし得るものであ
る。The power supply equipment of each of the embodiments can be applied to, for example, an X-ray CT scanner having an appearance as shown in FIG. The X-ray CT scanner includes a gantry 7 that is tilt-driven and a bed 8 on which the subject P is inserted and moved and the height of the pedestal 7 is adjusted. The gantry 7 is equipped with an X-ray tube 9 and an X-ray detector 10, and can perform a scanning operation on the subject P while rotating and moving them around the subject P.
前述の如く、スキャン時に大電力を消費する第１のユニ
ツトに対し、２次電池５より給電し、あるいは２次電池
５と整流回路２から給電する構成としておくことによ
り、商用電源１の電源容量を従来に比して大幅に小さく
することができる。As described above, the power supply capacity of the commercial power source 1 is set by supplying power from the secondary battery 5 or from the secondary battery 5 and the rectifier circuit 2 to the first unit that consumes a large amount of power during scanning. Can be significantly reduced compared to the conventional one.
換言すれば、第１のユニツト３に対するピーク値のパワ
ーは２次電池５よりもしくは２次電池５と整流回路（商
用電源側）２との両方より供給されるため、第１図及び
第２図に示す如くの電源設備は、商用電源１より第１の
ユニツト３のピーク電力に対応する受電を必要とせず、
その第１のユニツト３の平均電力に対応する受電をする
電源設備でよいことになる。In other words, the peak value power for the first unit 3 is supplied from the secondary battery 5 or both the secondary battery 5 and the rectifier circuit (commercial power supply side) 2, and therefore the power shown in FIGS. The power supply facility as shown in FIG. 2 does not need to receive the power corresponding to the peak power of the first unit 3 from the commercial power supply 1,
A power supply facility that receives power corresponding to the average power of the first unit 3 will suffice.
例えば、スキャン時間が200スキャン／日で１スキャン
が３秒である場合、600秒／日であるから、ピーク電力
を必要とするのは、１日当りの稼動時間を８時間とする
と、10分/480分より、１日当り２％強程度がピーク電力
の供給時間である。For example, if the scan time is 200 scans / day and one scan is 3 seconds, it is 600 seconds / day. Therefore, peak power is required for 10 hours / day if the operating time per day is 8 hours. From 480 minutes, the peak power supply time is about 2% or more per day.
そのため、スキャン時のピーク電力が非スキャン時の電
力の約10倍とすると、平均電力は、非スキャン時の電力
の1.2倍程度となる。従って、本発明の各実施例の電源
設備の構成であれば、商用電源の電源容量を従来の1/8
程度にすることができる。これにともない電源ケーブル
の定格を小さな電力容量のものに抑えることもできる。
更に、Ｘ線CTスキャナにおけるＸ線高電圧装置の部分に
関しては、従来、平滑用に電解コンデンサを用いていた
部分に、例えば第４図に示す如く２次電池5aを用いるこ
とにより、Ｘ線発生用の昇圧が可能となる。即ち、第４
図に示す構成は、Ｘ線高電圧装置の要部をなす高圧トラ
ンス11への主電力供給源として２次電池5aを用い、この
２次電池5aから高圧トランス11へチョッパ12及びインバ
ータ13を介在して給電する充放電回路を形成しているた
め、スキャン時のパワーをスキャン時を含めそのスキャ
ン前の休止中に２次電池5aに充電することができる。な
お、図中、９はＸ線管である。Therefore, if the peak power during scanning is about 10 times the power during non-scanning, the average power is about 1.2 times the power during non-scanning. Therefore, with the configuration of the power supply equipment of each embodiment of the present invention, the power capacity of the commercial power supply is
It can be a degree. Along with this, it is possible to limit the rating of the power cable to one with a small power capacity.
Further, regarding the portion of the X-ray high-voltage device in the X-ray CT scanner, by using a secondary battery 5a as shown in FIG. It is possible to boost the pressure. That is, the fourth
The configuration shown in the figure uses a secondary battery 5a as a main power supply source to a high-voltage transformer 11 which is a main part of an X-ray high-voltage device, and a chopper 12 and an inverter 13 are interposed from the secondary battery 5a to the high-voltage transformer 11. Since the charging / discharging circuit for supplying power is formed, the secondary battery 5a can be charged with the power at the time of scanning during the rest before the scanning including during the scanning. In the figure, 9 is an X-ray tube.
従って、スキャン・アンド・ビューのモードに固定され
ているようなシーケンスで、すなわち、スキャン間休止
がある一定時間確保されるようなCTスキャナを稼動する
場合、スキャン休止時に充電し、そのエネルギーを次の
スキャンが行えるように２次電池5aを選定することによ
り、非常に経済的なCTシステムを実現することができ
る。Therefore, when operating the CT scanner in a sequence that is fixed to the scan and view mode, that is, when a scan pause is secured for a certain period of time, it is charged during the scan pause and its energy is A very economical CT system can be realized by selecting the secondary battery 5a so that the scanning can be performed.
例えば、第５図に示す如く、スキャン時間:3秒、最短ス
キャン間隔:20秒としたスキャンサイクルにあっては、
約3/20の電力と常時必要な電力との総和電力を用意すれ
ばよいことになり、全体的にみて従来の数分の１の電源
容量でよいことになる。For example, as shown in FIG. 5, in a scan cycle with a scan time of 3 seconds and a minimum scan interval of 20 seconds,
It is only necessary to prepare the total electric power of about 3/20 of the electric power and the power that is always required, and as a whole, a power supply capacity that is a fraction of the conventional power supply will be sufficient.
なお、従来はピーク電力のパワーを確保するため、商用
電源として、第６図に示す如く三相電源1aを用い、また
平滑のため電解コンデンサバンク14を用いていた。この
第６図において、第４図と同一符号に対応する部分を示
している。Conventionally, in order to secure the peak power, a three-phase power source 1a is used as a commercial power source as shown in FIG. 6, and an electrolytic capacitor bank 14 is used for smoothing. In FIG. 6, parts corresponding to the same reference numerals as in FIG. 4 are shown.
このようなことから、第５図に例示したスキャンサイク
ルとした場合、従来の第６図に示す如くの構成において
スキャン条件を120KV、200mAとした際、 120KV×200mA÷0.7≒34KVA必要としたのに対し、 第４図に示す如く本発明が適用された構成であると 34KV×3/20≒5KVA となり、小電源容量で済むことになる。なお、上式中、
0.7は効率を表わし、ここでは0.7と仮定している。From the above, in the case of the scan cycle illustrated in FIG. 5, when the scan conditions are 120 KV and 200 mA in the conventional configuration shown in FIG. 6, 120 KV × 200 mA ÷ 0.7≈34 KVA is required. On the other hand, with the configuration to which the present invention is applied as shown in FIG. 4, 34 KV × 3 / 20≈5 KVA, which means a small power supply capacity. In the above formula,
0.7 represents efficiency, which is assumed to be 0.7 here.
［発明の効果］ 以上説明したように、本発明が適用されたCTスキャナ
は、スキャン時に大電力を消費する負荷への電力供給源
として２次電池を設けたことから、商用電源の電源容量
を小さく抑えることができ、これにともない電源ケーブ
ルの定格についても小電力容量のものを選ぶことができ
ることになる。従って、本発明によれば、従来の比して
経済的にCTスキャナの電源設備を構築することができる
という利点が得られる。[Effects of the Invention] As described above, since the CT scanner to which the present invention is applied has the secondary battery as a power supply source to the load that consumes a large amount of power during scanning, the power capacity of the commercial power supply is reduced. The power cable can be kept small, and the power cable can be selected with a small power capacity. Therefore, according to the present invention, there is an advantage that the power supply equipment of the CT scanner can be constructed more economically than the conventional one.
第１図及び第２図は本発明が適用されたCTスキャナにお
ける電源設備のそれぞれ実施例を示す構成図、第３図は
CTスキャナの一例の外観を示す斜視図、第４図は本発明
の他実施例の電源設備を示す構成図、第５図はスキャン
サイクルを示すタイミングチャート、第６図は従来の電
源設備の一例を示す構成図である。 １……商用電源、２……整流回路 ３……第１のユニツト、４……切換操作部 5,5a……２次電池、６……第２のユニツト 11……高圧トランス、12……チョッパ 13……インバータ1 and 2 are configuration diagrams showing respective embodiments of power supply equipment in a CT scanner to which the present invention is applied, and FIG.
FIG. 4 is a perspective view showing the appearance of an example of a CT scanner, FIG. 4 is a block diagram showing the power supply equipment of another embodiment of the present invention, FIG. 5 is a timing chart showing the scan cycle, and FIG. 6 is an example of conventional power supply equipment. It is a block diagram which shows. 1 ... Commercial power source, 2 ... Rectifier circuit 3 ... First unit, 4 ... Switching operation unit 5, 5a ... Secondary battery, 6 ... Second unit 11 ... High-voltage transformer, 12 ... Chopper 13 …… Inverter
Claims (1)
画像を再構成するCTスキャナにおいて、 スキャン時に大電力を消費するＸ線管を有する第１の負
荷と、 この第１の負荷に対し電力を供給する商用電源と、 前記第１の負荷若しくは前記商用電源のいずれかに接続
され、前記第１の負荷への大電力の供給若しくは自己の
充電を行う２次電池と、 前記Ｘ線管の動作時は、前記２次電池をこの第１の負荷
側に接続して大電力を供給し、前記Ｘ線管の非動作時
は、前記２次電池を前記商用電源側に接続して充電する
よう切換える切換手段と、 前記商用電源に直接又は整流回路を介して接続され、ス
キャン休止間に小電力を消費する第２の負荷と、 を有することを特徴とするCTスキャナ。1. A CT scan of a subject to collect data, and a CT
In a CT scanner for reconstructing an image, a first load having an X-ray tube that consumes a large amount of power during scanning, a commercial power supply that supplies power to the first load, the first load or the commercial load A secondary battery that is connected to one of the power sources and supplies a large amount of power to the first load or charges itself; and, when the X-ray tube is operating, the secondary battery is connected to the first load side. To supply a large amount of power to the X-ray tube and connect the secondary battery to the commercial power source side for charging when the X-ray tube is not operating; And a second load connected through the second load and consuming a small amount of power during a scan pause, and a CT scanner.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125330A JPH0673315B2 (en) | 1990-05-17 | 1990-05-17 | CT scanner |
| US07/908,545 US5226064A (en) | 1990-05-17 | 1992-06-30 | Computerized tomographic scanning apparatus driven by rechargeable batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2125330A JPH0673315B2 (en) | 1990-05-17 | 1990-05-17 | CT scanner |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6011362A Division JP2593626B2 (en) | 1994-01-01 | 1994-01-07 | CT scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0422100A JPH0422100A (en) | 1992-01-27 |
| JPH0673315B2 true JPH0673315B2 (en) | 1994-09-14 |
Family
ID=14907446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2125330A Expired - Fee Related JPH0673315B2 (en) | 1990-05-17 | 1990-05-17 | CT scanner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0673315B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7522705B2 (en) * | 2006-11-14 | 2009-04-21 | General Electric Company | Power handling methods and apparatus |
| JP5570746B2 (en) * | 2009-03-24 | 2014-08-13 | 株式会社東芝 | X-ray computed tomography system |
| US10646192B2 (en) * | 2017-03-20 | 2020-05-12 | General Electric Company | Peak shave enabled computed tomography system with built-in uninterruptible power supply and stabilizer |
| WO2020137939A1 (en) | 2018-12-26 | 2020-07-02 | 雫石 誠 | Image capturing device and method for driving same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58840A (en) * | 1981-06-23 | 1983-01-06 | 増田 文彦 | Confectionery baking apparatus |
| JPS59170400U (en) * | 1983-04-28 | 1984-11-14 | 株式会社 日立メデイコ | X-ray device |
| JPS63248097A (en) * | 1987-04-01 | 1988-10-14 | Hitachi Medical Corp | Transformer type x-ray generation apparatus |
| JPH01139400U (en) * | 1988-03-18 | 1989-09-22 |
-
1990
- 1990-05-17 JP JP2125330A patent/JPH0673315B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0422100A (en) | 1992-01-27 |
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