WO2017220116A1 - Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie - Google Patents

Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie Download PDF

Info

Publication number
WO2017220116A1
WO2017220116A1 PCT/EP2016/064197 EP2016064197W WO2017220116A1 WO 2017220116 A1 WO2017220116 A1 WO 2017220116A1 EP 2016064197 W EP2016064197 W EP 2016064197W WO 2017220116 A1 WO2017220116 A1 WO 2017220116A1
Authority
WO
WIPO (PCT)
Prior art keywords
stationary
cooling
liquid
transfer liquid
rotating
Prior art date
Application number
PCT/EP2016/064197
Other languages
English (en)
Inventor
Herbert Staffler
Horst Knobl
Original Assignee
Schleifring Und Apparatebau Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schleifring Und Apparatebau Gmbh filed Critical Schleifring Und Apparatebau Gmbh
Priority to PCT/EP2016/064197 priority Critical patent/WO2017220116A1/fr
Publication of WO2017220116A1 publication Critical patent/WO2017220116A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • A61B6/035—Mechanical aspects of CT
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/44—Constructional features of apparatus for radiation diagnosis
    • A61B6/4488—Means for cooling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N2005/002—Cooling systems
    • A61N2005/005—Cooling systems for cooling the radiator
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
    • A61N5/1077—Beam delivery systems
    • A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries

Definitions

  • the invention relates to a device for cooling rotating apparatus. It specifically relates to a device for cooling the rotating gantries of CT scanners (computed tomography scanners) or RT devices (radiotherapy or radiation therapy devices).
  • CT scanners computed tomography scanners
  • RT devices radiotherapy or radiation therapy devices
  • RT devices are used for generating ionizing radiation, mainly for treating cancer.
  • the radiation source may be rotatable to bring it into a desired position with respect to a patient.
  • a CT scanner which may rotate with high speed
  • Radiotherapy devices consume and dissipate much more electrical power than CT scanners. Therefore good cooling is even more important.
  • US 2004/0228450 Al discloses a cooled gantry, where the housing forms an air duct, through which air is blown by large fans. The problem is the obstructed air flow, as it passes on one side of the rotating part in rotation direction and at the other side opposite to the rotation direction, causing high friction and low air throughput. At the same time, the high air flow causes significant noise.
  • US 5,709,156 Bl discloses a cooling unit heat exchangers.
  • the rotating part comprises a plurality of heat exchange elements which are supplied by a cooling liquid and provide a radial flow of hot air, which is further guided through multiple stationary heat exchange elements, which are further cooled by a cooling liquid.
  • the disadvantage is the complex structure and the radial air flow which also requires large air ducts.
  • DE 199 45 415 Al discloses a ring-shaped heat exchanger. At the rotating part of the gantry, there is a first ring-shaped section which is thermally connected by a cooling liquid to the X-ray tube. This rotating heat exchanger is in close proximity to a stationary heat exchanger which also has a circular shape and is cooled by a cooling liquid. To improve heat exchange, the surface between the rotary and the stationary heat exchanger is increased by a meander shape. As disclosed in this document in col. 5, lines 20 - 21, a thermal power of up to 30 kW can be transferred by this heat exchanger. This is not sufficient for modern CT scanners.
  • the problem to be solved by the invention is to provide a cooling device for rotating apparatus like CT scanners or RT devices which is comparatively compact and does not need large air ducts. It should be useable for large power dissipa- tion in the range of more than 50 kW, and it should avoid the significant noise generated by large fans. Furthermore, manufacturing and maintenance costs should be comparatively low.
  • a first embodiment relates to a cooling device preferably for a CT scanner or RT device which is based on a heat transferring rotary joint.
  • the cooling device has a rotating part and a stationary part which basically are freely rotatable against each other.
  • rotating and stationary are used to simplify the explanation. It is obvious, that rotating and stationary parts can easi- ly be exchanged.
  • the rotating part comprises a rotating body having at least one cooling liquid duct or pipe. This cooling liquid duct preferably has a cooling liquid input and a cooling liquid output.
  • the cooling liquid duct may be supplied with a cooling liquid having a first temperature, preferably a higher temperature, whereas the cooling liquid output is provided for delivery of a sec- ond temperature, preferably of a lower temperature.
  • the cooling liquid input and output may be connected via pipes or tubes or other means to a heat source, like an X-ray tube in a CT scanner, a radiation source in an RT device and/or further components generating heat, like a power supply or others.
  • the stationary part preferably comprises a stationary body which preferably is enclosed by a stationary wall, forming a container for a transfer liquid.
  • the primary body is held rotatably within/relative to the stationary body.
  • the stationary body is at least partially filled with a transfer liquid, such that the transfer liquid is in contact with the rotating body to perform a heat exchange.
  • the rotating body can freely rotate, while being in continuous contact with the transfer liquid. Therefore, it can continuously couple heat to the stationary body via the transfer liquid.
  • the rotating body has a surface structure for increasing the thermal transfer surface which may comprise fins or grooves to increase the surface, and therefore to increase thermal coupling.
  • the rotating body has a constant cross-section, most preferably including the surface structure to provide a low flow resistance through the transfer liquid. There may be minor discontinuities, edges or fins to cause addi- tional turbulence in the transfer liquid to further increase heat exchange.
  • the stationary body preferably is connected to input and output pipes, by which the transfer liquid may be exchanged or at least forwarded to a cooler, which may be cooling device, a heat exchanger, or any other means for reducing the temperature of the transfer liquid.
  • the cooler preferably removes warm or hot transfer liquid, preferably supported by a pump, from the stationary body and delivers cooled transfer liquid back to the stationary body.
  • the secondary body forms at least a container for the transfer liquid which may be open at one side, preferably the top side. It may also completely enclose the primary body to avoid any leakage and spillage of the transfer liquid, even at high rotational speeds.
  • the transfer liquid at the stationary part is continuously exchanged to keep a low transfer liquid temperature.
  • any of the liquids mentioned herein may comprise water, alcohol, oil, or any combination thereof. They may further comprise any other medium, which has a liquid-like characteristic and is suitable for transferring heat. Such a medium may be a gas, a liquid gas, or even a liquid metal. It is obvious that the solution explained herein, based on a preferred embodiment which relates to a CT scanner or RT device, is not limited to such CT scanners or RT devices.
  • the general inventive concept is applicable to a large variety of rotating devices and apparatus which require heating and/or cooling.
  • the invention is also not limited to cooling as described above, but it may also be used for heating a rotating device. Furthermore, it may be used for combined heating and cooling. For example before startup, the rotating part may be heated to a minimum operational temperature, whereas it will later be cooled to prevent overheating.
  • the embodiments described herein have a significantly smaller size compared to the prior art. No air ducts are required. Due to the liquid heat transfer medium between the rotating and the stationary part, a very low thermal resistance can be realized which allows to reduce the coupling surface and therefore the overall size of the device significantly, compared to the prior art as known for example from the DE 199 45 415 Al. Furthermore, the embodiments disclosed herein cause significantly less noise than the air cooling devices known from the prior art, as the high volume air stream through the prior art devices always generates noise from air flow and noise from the fans generating the air flow, which are no more required in the embodiments disclosed herein. Finally, the embodiments require less and simpler mechanical parts. For example, fans known from the prior art having a rotation axis radial to the main rotation axis of the CT scanner gantry have only a short life time due to the tilting forces on the bearings due to gyro effect.
  • Figure 1 shows a first embodiment in a front view and a sectional side view.
  • Figure 2 shows a second embodiment.
  • Figure 3 shows another embodiment with a transfer liquid cooling pipe.
  • Figure 4 shows a block diagram of a preferred embodiment.
  • Figure 5 shows a CT scanner gantry.
  • a first embodiment of a cooling device is shown in a front view (left image) and a side view (right image).
  • the cooling device comprises a rotating part 100 and a stationary part 200.
  • the rotating part preferably has an axis of rotation 310 around which it rotates freely within/relative to the stationary part.
  • the rotating part 100 comprises a rotating body 110, having at least one cooling liquid duct 120, which may also be a larger cooling liquid duct.
  • This cooling liquid duct may be connected via a first rotating pipe connector 131 and a second rotating pipe connector 132 to a first rotating pipe 141 and a second rotating pipe 142, for exchanging liquid within the cooling liquid duct.
  • a hot cooling liquid may be fed via first rotating pipe connector 131 and first rotating pipe 141 into the cooling liquid duct 120 of the rotating body, and it may exit the cooling liquid duct 120 via second rotating pipe connector 132 and a second rotating pipe 142.
  • the stationary part 200 comprises a stationary body 210 having at least one wall 211.
  • the wall comprises a liquid guide 212, which allows spillage of the liquid.
  • the stationary body 210 encloses a transfer liquid 220, which is in contact with the rotating body 110 to provide heat exchange.
  • a heat exchange may be improved by an increased surface of the rotating body 110, which for example may have a surface structure 121 for increasing the thermal transfer surface.
  • the stationary body preferably has at least one first stationary pipe connector 231 which may be connected to a first stationary pipe 241, and at least one secondary stationary pipe connector 232 which may be connector to a sec- ondary stationary pipe 242.
  • first stationary pipe connector 231 which may be connected to a first stationary pipe 241
  • secondary stationary pipe connector 232 which may be connector to a sec- ondary stationary pipe 242.
  • the liquid may be exchanged, or there may be at least a liquid flow through the stationary body to remove hot liquid and to feed cold liquid.
  • the stationary part may have any other means for exchanging the transfer liquid 220 therein.
  • a second embodiment is shown.
  • the stationary body 210 does not fully enclose the primary body 110, as shown in Figure 1. Instead, it only provides a section which is sufficient to hold the transfer liquid.
  • the transfer liquid preferably flows to the bottom side of the stationary part due to gravity, it is only necessary to provide a section at the bottom side. The top side may be left open.
  • This embodiment is at least useable for low rotational speeds. At higher rotational speeds, the liquid may be accelerated within the stationary body by the rotating body. Therefore, a full cover as shown in Figure 1 is appreciated for higher rotational speeds, whereas for lower rotational speeds, the second embodiment provides cost and weight benefits due to the use of less material.
  • a further embodiment is shown.
  • FIG 4 a block diagram of a preferred embodiment is shown.
  • the rotating component 591 On top of the Figure is the rotating component 591, whereas at the bottom, there is the sta- tionary component 592.
  • the cooling device Between the rotating and the stationary component, there is the cooling device having a rotating part 100 and a stationary part 200.
  • the rotating part 100 is preferably connected via first rotating pipe 141 and second rotating pipe 142 to a heat source, like an X-ray tube 510.
  • the X-ray tube 510 may be directly connected to the rotating part 100, although it is preferred to have a heat exchanger in-between. It is further preferred, if there is at least one pump for ensuring a liquid flow through the X-ray tube and the heat exchanger.
  • the X-ray tube 510 may have a cooling liquid output 511 which is connected to a heat exchanger primary input 531.
  • the heat exchanger primary output 532 may be connected via a pump 520 to cooling liquid input 512 of X-ray tube 510, thus providing a closed system.
  • the heat exchanger 530 couples heat from its primary side from primary input 531 and primary output 532 to its secondary side, connected to secondary output 534 and secondary input 533.
  • a hot cooling liquid from the heat exchanger is input to rotating body via first rotating pipe 141, whereas the cooled liquid is fed back from the rotating part 100 via the second rotating pipe 142 to the secondary input 533 of heat exchanger 530, therefore providing a second closed liquid cooling circuit.
  • the stationary part of the cooling system preferably provides a liquid output to a first stationary pipe 241, which may be fed to a cooler 550 via cooler input 551.
  • the cooler provides a cooled liquid output at its cooler output 552, which may be fed via second stationary pipe 242 back into the stationary part 200. It is preferred, if there is a pump 540 between the cooler 550 and the stationary part 200, preferably between the cooler output 552 and second stationary pipe 242 of stationary part 200.
  • the liquid level in the stationary part may change dependent of the rotating speed, it is preferred to have means for controlling or at least limiting the transfer liquid level to a certain amount or within certain limits. This may be done by having a reservoir 570, which may be connected via a control valve and/or pump 560 to the liquid circuit of the stationary part 200 where it may be connected to the first stationary pipe 241 or the second stationary pipe 242. There may be a further control circuit which may collect information via an electrical, electronic or mechanical level or pressure sensor for keeping the level constant.
  • FIG 5 shows schematically a CT (Computed Tomography) scanner gantry.
  • the stationary part is suspended within a massive frame 810.
  • the rotating part 809 of the gantry is rotatably mounted with respect to the stationary part and rotates along the rotation direction 808. It supports an X - ray tube 801 for generating an X-ray beam 802 that radiates through a patient 804 lying on a table 807 and which is intercepted by a detector 803.
  • Electrical power from power supply unit 811 may be transmitted by a slipring (not shown) to the rotating part.
  • the imaging data obtained by the detector 803 are transmitted via contactless rotary joint 800 to an evaluation unit 806 by means of a data bus or network 805.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • X-Ray Techniques (AREA)

Abstract

La présente invention décrit un dispositif de refroidissement destiné à un tomodensitomètre ou un dispositif de radiothérapie comprenant une pièce rotative et une pièce stationnaire, la pièce rotative pouvant tourner de manière libre par rapport à la pièce stationnaire autour d'un axe de rotation. La pièce rotative comprend un corps rotatif avec au moins un conduit de liquide de refroidissement. La pièce stationnaire comprend un corps stationnaire présentant au moins une paroi destinée à contenir un liquide de transfert. Le corps rotatif se trouve en contact avec le liquide de transfert afin de transférer la chaleur entre le corps rotatif et le liquide de transfert.
PCT/EP2016/064197 2016-06-20 2016-06-20 Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie WO2017220116A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/064197 WO2017220116A1 (fr) 2016-06-20 2016-06-20 Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/064197 WO2017220116A1 (fr) 2016-06-20 2016-06-20 Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie

Publications (1)

Publication Number Publication Date
WO2017220116A1 true WO2017220116A1 (fr) 2017-12-28

Family

ID=56178344

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/064197 WO2017220116A1 (fr) 2016-06-20 2016-06-20 Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie

Country Status (1)

Country Link
WO (1) WO2017220116A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109567842A (zh) * 2018-12-26 2019-04-05 上海毫厘机电科技有限公司 一种用于医疗pet系统的水冷环组件
CN109589124A (zh) * 2018-11-21 2019-04-09 上海联影医疗科技有限公司 冷却装置以及医学影像系统
WO2020106523A1 (fr) * 2018-11-19 2020-05-28 Reflexion Medical, Inc. Anneau de refroidissement thermique pour système de radiothérapie
WO2020208207A1 (fr) * 2019-04-12 2020-10-15 Elekta Limited Appareil de radiothérapie
GB2590648A (en) * 2019-12-20 2021-07-07 Elekta ltd Radiotherapy apparatus
US11975220B2 (en) 2016-11-15 2024-05-07 Reflexion Medical, Inc. System for emission-guided high-energy photon delivery
US12029921B2 (en) 2022-06-28 2024-07-09 Reflexion Medical, Inc. Systems and methods for patient monitoring for radiotherapy

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404335A1 (fr) * 1989-05-19 1990-12-27 Picker International, Inc. Appareil de radiation
US5299249A (en) * 1992-11-27 1994-03-29 Picker International, Inc. Heat transfer techniques for moving thermal energy from high power X-ray tubes on rotating CT gantries to a remote location
US5709156A (en) 1995-06-07 1998-01-20 Krueger International, Inc. Flip-up electrical and communications device for use in combination with a worksurface
DE19945415A1 (de) 1999-09-22 2001-04-12 Siemens Ag Kühleinrichtung und Computertomograph mit einer derartigen Kühleinrichtung
US20040228450A1 (en) 2003-02-05 2004-11-18 Han-Juergen Mueller Cooling system and method to cool a gantry
DE102013205606A1 (de) * 2013-03-28 2014-10-02 Siemens Aktiengesellschaft Computertomographiegerät
US20150043706A1 (en) * 2013-08-09 2015-02-12 Siemens Aktiengesellschaft Rotating unit of a medical imaging device with a hydrostatic slide bearing and an integrated coolant conduit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404335A1 (fr) * 1989-05-19 1990-12-27 Picker International, Inc. Appareil de radiation
US5299249A (en) * 1992-11-27 1994-03-29 Picker International, Inc. Heat transfer techniques for moving thermal energy from high power X-ray tubes on rotating CT gantries to a remote location
US5709156A (en) 1995-06-07 1998-01-20 Krueger International, Inc. Flip-up electrical and communications device for use in combination with a worksurface
DE19945415A1 (de) 1999-09-22 2001-04-12 Siemens Ag Kühleinrichtung und Computertomograph mit einer derartigen Kühleinrichtung
US20040228450A1 (en) 2003-02-05 2004-11-18 Han-Juergen Mueller Cooling system and method to cool a gantry
DE102013205606A1 (de) * 2013-03-28 2014-10-02 Siemens Aktiengesellschaft Computertomographiegerät
US20150043706A1 (en) * 2013-08-09 2015-02-12 Siemens Aktiengesellschaft Rotating unit of a medical imaging device with a hydrostatic slide bearing and an integrated coolant conduit

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11975220B2 (en) 2016-11-15 2024-05-07 Reflexion Medical, Inc. System for emission-guided high-energy photon delivery
WO2020106523A1 (fr) * 2018-11-19 2020-05-28 Reflexion Medical, Inc. Anneau de refroidissement thermique pour système de radiothérapie
CN109589124A (zh) * 2018-11-21 2019-04-09 上海联影医疗科技有限公司 冷却装置以及医学影像系统
CN109567842A (zh) * 2018-12-26 2019-04-05 上海毫厘机电科技有限公司 一种用于医疗pet系统的水冷环组件
WO2020208207A1 (fr) * 2019-04-12 2020-10-15 Elekta Limited Appareil de radiothérapie
US11931603B2 (en) 2019-04-12 2024-03-19 Elekta Limited Radiotherapy apparatus
GB2590648A (en) * 2019-12-20 2021-07-07 Elekta ltd Radiotherapy apparatus
GB2590648B (en) * 2019-12-20 2022-01-05 Elekta ltd Radiotherapy apparatus
US12029921B2 (en) 2022-06-28 2024-07-09 Reflexion Medical, Inc. Systems and methods for patient monitoring for radiotherapy

Similar Documents

Publication Publication Date Title
WO2017220116A1 (fr) Dispositif de refroidissement destiné à un tomodensitomètre ou des dispositifs de radiothérapie
KR101928791B1 (ko) 열 조절 시스템을 갖는 직접 구동 풍력 터빈
US7065173B2 (en) Method and apparatus for thermal management of CT electronics
KR20200133175A (ko) 웨이퍼 보트 취급 장치, 수직 배치 퍼니스 및 방법
US7076028B2 (en) Optimized x-ray tube cooling device
CN1891017B (zh) X射线管组件、冷却系统及二者组合和该组件的冷却方法
JP5307359B2 (ja) 一体型ｘ線管冷却系及び装置
EP2214559B1 (fr) Refroidissement de portique
JP2004237103A (ja) コンピュータ断層撮影装置のガントリの冷却システムおよび冷却方法
JP2009268830A (ja) Ｘ線コンピュータ断層撮影装置
JP2001120535A (ja) 冷却装置および冷却装置を有するコンピュータトモグラフ
US7393138B2 (en) Integrated coolant conduction for a computer tomograph
US20210267683A1 (en) Thermal cooling ring for radiation therapy system
US20220272866A1 (en) Water cooler assembly and system
EP2111162B1 (fr) Appareil à rayons x de diagnostic médical pourvu d'un dispositif de refroidissement
US7634211B2 (en) Temperature control system for a roller in an image forming apparatus
US9799480B2 (en) CT system
WO2017139923A1 (fr) Radiateur et dispositif électrique
US6997609B2 (en) System and method for cooling an x-ray tube in a tomography computer system
US9402588B2 (en) Rotating unit of a medical imaging device with a hydrostatic slide bearing and an integrated coolant conduit
EP1894642A1 (fr) Système de contrôle de la température pour un rouleau dans un appareil de formation d'images
JP7433407B2 (ja) 放熱構造及び検査デバイス
US3753463A (en) Device for cooling the bearings of heated rolls
CN210840464U (zh) 一种导流地板及数据中心的散热系统
CN103705254B (zh) 计算机x射线层析扫描仪台架的冷却装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16731122

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16731122

Country of ref document: EP

Kind code of ref document: A1