WO2001081950A1 - Dispositif de collection de rayonnements ionisants avec fibre optique de scintillation - Google Patents
Dispositif de collection de rayonnements ionisants avec fibre optique de scintillation Download PDFInfo
- Publication number
- WO2001081950A1 WO2001081950A1 PCT/FR2001/001254 FR0101254W WO0181950A1 WO 2001081950 A1 WO2001081950 A1 WO 2001081950A1 FR 0101254 W FR0101254 W FR 0101254W WO 0181950 A1 WO0181950 A1 WO 0181950A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- scintillating
- ionizing radiation
- connection means
- light guide
- collection
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/201—Measuring radiation intensity with scintillation detectors using scintillating fibres
Definitions
- the invention relates to the collection of ionizing radiation, in particular emitted by radioactive biological markers, and the conversion of this radiation into light signals intended for an apparatus for detecting ionizing radiation.
- This type of device is usually used in the medical field to locate the radioactive nuclei of molecules (markers) injected into the human body, before surgery.
- Such an apparatus is notably described in patent EP 650601.
- the invention relates more particularly to collection devices comprising a scintillating element housed in a sheath opaque to light and comprising a first end arranged to receive ionizing radiation and a second end delivering light signals resulting from the conversion of ionizing radiation received by the first end.
- the scintillating element which is a scintillating fiber
- the opaque sheath are directly connected to the detection device, which requires scintillating fibers several meters long.
- the second end of the scintillating element which is also a scintillating fiber
- the sheath therefore extends from the first end of the scintillating fiber to the second end of the optical fiber and, thereby, definitively traps the two scintillating and optical fibers.
- the failure of one of the fibers therefore requires the complete replacement of the collection device.
- the invention aims to improve the situation by providing a different solution from those known.
- a device for collecting ionizing radiation which includes a scintillating element housed in an opaque sheath, filtering means placed at the first end of the sheath and intended to prevent access to the first end of the sheath.
- element scintillating at least to the photons (v) external and, at the second end of the scintillating element, a first connection means intended to be connected to light guide means to allow the coupling of the second end of the scintillating element at the end of a light guide of the light guide means.
- the collection device is an active element which can be reversibly connected to a passive light guiding element (the two elements then forming a collection assembly), so that it can be replaced independently of this.
- passive element and its dimensions can be chosen according to the applications.
- the device not being parasitized by photons, it has a signal / noise ratio significantly higher than the devices of the prior art and therefore improves the sensitivity of the detection devices to which it can be connected via a passive light guide element.
- the length of the scintillating element is between approximately 0.1 millimeter and approximately one meter, and more preferably between approximately 0.1 millimeter and approximately 50 centimeters, and more preferably still between approximately 0.1 millimeter and approximately 5 centimeters.
- connection between the active device and the passive light guiding element can be carried out in different ways, and in particular by means of a coupling element preferably made of a material having a substantially equal refractive index. to that of glass.
- a coupling element preferably made of a material having a substantially equal refractive index. to that of glass.
- the second end of the opaque sheath extends beyond the second end of the scintillating element, to form an extension of chosen length which is deformed to produce the first connection means.
- the deformation allows the introduction of at least one end of the light guide inside the opaque sheath.
- the first connection means is therefore in the form of a sleeve.
- the first connection means is an insert comprising first immobilization means, such as for example latching means or a thread intended to cooperate with complementary immobilization means formed on second means of connection of the light guiding means.
- the filtering means are preferably produced in the form of a nozzle comprising a first sheet material which has a density of between approximately 40 grams per square meter (g / m 2 ) and approximately 300 g / m 2 , in particular paper. black.
- This tip may also include a second sheet material making it possible to block ionizing radiation of the gamma ( ⁇ ) type, for example of polyethylene terephthalate (PET) of the mylar type, and secured to the first sheet material by an intermediate bonding layer, by example an adhesive transparent to ionizing radiation, so that only ionizing radiation of beta type is converted.
- ⁇ gamma
- PET polyethylene terephthalate
- the scintillating element can be chosen from a group comprising one or more scintillating optical fibers, scintillating grains, scintillant crystals such as Csl, Nal and BGO, a scintillating plastic of density preferably between approximately 0.8 and 1.6 mg / cm 2 , a scintillating liquid and a scintillating gel.
- the scintillating element is composed of several substantially identical scintillating fibers, it is advantageous that they form a beam and are coupled to a beam of light guides of the light guide means.
- the filtering means may be advantageous for the filtering means to include a chosen zone of small extension which allows the entry of ionizing radiation of gamma type ( ⁇ ) and of beta type ( ⁇ ), so that said scintillating fiber can convert as light signals the gamma and beta ionizing radiation received.
- the scintillating element comprises a first part placed downstream of the filtering means for converting ionizing radiation of gamma type into photons, and a second part placed downstream of said first part to convert ionizing radiation of beta type in photons.
- the first part consists of scintillating crystals chosen from the group comprising at least Csl, Nal and BGO, and that the second part is a scintillating plastic with a density preferably between approximately 0 , 8 and 1, 6 mg / cm 2 .
- the invention also relates to a set of collection of ionizing radiations comprising means for guiding light suitable for being connected to a collection device of the type of that mentioned above.
- FIG. 1 is a longitudinal sectional view of a first embodiment of a collection assembly according to the invention
- FIG. 2 is an enlarged view of the first end of the device forming part of the assembly illustrated in Figure 1
- FIG. 3 is a variant of the assembly illustrated in FIG. 1,
- FIG. 4 is a cross-sectional view of the device forming part of the assembly illustrated in Figure 3
- - Figure 5 is a cross-sectional view of a second mode of production of a collection set according to the invention
- FIG. 6 is a variant of the assembly illustrated in FIG. 5,
- FIG. 7 is a cross-sectional view of the components of another variant of the collection device according to the invention, before assembly, and
- FIG. 8 is a cross-sectional view of the components of yet another variant of the collection device according to the invention, before assembly.
- FIG. 1 Reference is first made to FIG. 1 to describe a first embodiment of a collection device according to the invention, and of a collection set according to the invention, incorporating the aforementioned device.
- the collection assembly comprises a collection device 1 connected to a light guiding device 2.
- the collection device 1 comprises a sheath 3 opaque to light in which is housed a scintillating element produced in the form of a scintillating fiber 4.
- the scintillating fiber 4 is for example composed of a scintillator formed by a single dissolved solute in a solvent.
- the solute can be, for example, (bi-phenylyl-4) -phenyl-6-benzoxazole PDBO).
- Such fibers are sold in particular by the company KURABAY under the reference SCS-38 or SCSF-81.
- the opaque sheath 3 preferably has a thickness of around 1 mm.
- the constitution of the scintillating fiber allows it to convert the ionizing radiation of beta and gamma types into light signals exploitable by a detection device. This physical phenomenon is well known to those skilled in the art, it will not be described here in more detail.
- the scintillating fiber 4 has a first end 7 terminated by an inlet face 8, preferably polished, through which the ionizing radiation emitted by the radioactive markers which it is to be detected can penetrate.
- the inlet face 8 is substantially perpendicular to the longitudinal axis of the scintillating fiber.
- this inlet face 8 could be oblique, for example formed at 45 ° from the longitudinal axis, or at another angle suitable for the desired applications.
- a filter 9 In front of the input face 8 of the scintillating fiber is placed a filter 9 intended to prevent access to the scintillating fiber 4 to gamma-type radiation as well as to photons (v).
- the filter 9 is produced in the form of a nozzle fitted on the first end 7 of the scintillating fiber 4, so that it is immobilized against this scintillating fiber by the first end 10 of the opaque sheath 3.
- the filter comprises, in its part placed opposite the entry face 8 of the scintillating fiber 4, a multilayer structure comprising a first layer 11 intended to block the ionizing radiation of gamma type, a second layer 12 intended to block the photons and a third layer 13 intended to join the first 11 and second 12 layers.
- the first layer 11 is made of a material of the polyethylene terephthalate (PET) type, such as for example mylar.
- the second layer 12 is made of a sheet material having a density of between approximately 40 grams per square meter (g / m 2 ) and approximately 300 g / m 2 , such as for example black paper or a plastic film. opaque of the type used to package photographic film with high sensitivity, typically 1000 ASA. More preferably, this sheet material has a density of approximately 120 grams per square meter (g / m 2 ).
- the third layer 13 is preferably an adhesive transparent to ionizing radiation.
- the scintillating fiber 4 has a second end 14, opposite the first end 7.
- the opaque sheath 3 has a second end 15, opposite its first end 10.
- the second end 15 extends beyond the second end 14 of the scintillating fiber 4 so as to form a first connection means 16.
- the first connection means 16 is produced by deformation of the sheath, so that a first end 17 of the passive element 2 can be introduced, by force, inside the second end 15 of the opaque sheath 3 to be immobilized there tightly.
- This coupling element 19 is made of a material having a refractive index substantially equal to that of glass. It will preferably be a fat, but it could also be a gel.
- the passive light guiding element 2 comprises an optical fiber 17 housed inside a opaque sheath 20 whose first end 21 is also housed inside the part 16 of the opaque sheath 3 forming the first connection means.
- This passive optical fiber can be made of plastic, glass, silica, and more generally solid or liquid or gelatinous.
- said second end comprises a coupling element 19 made of a material having a refractive index substantially equal to that of glass. It will preferably be a fat, but it could also be a gel.
- the dimensions of the scintillating fiber 4, and more precisely its length, are chosen according to the applications. However, for reasons of efficiency in converting ionizing radiation into light signals, it is preferable for the scintillating fiber to extend over a length of between approximately 0.1 mm and 1.50 m. Even more preferably, the scintillating fiber 4 extends over a length of between approximately 0.1 mm and 50 cm, and even more preferably between approximately 0.1 mm and approximately 5 cm.
- FIGS. 3 and 4 is illustrated a variant of the embodiment which has just been described with reference to FIGS. 1 and 2.
- the opaque sheath 3 of the collection device 1 according to the invention houses several scintillating fibers (in fact four, 4-1 to 4-4) assembled, preferably in the form of a bundle. This significantly improves the sensitivity of the detection.
- the passive light guiding element 2 also comprises a bundle of optical fibers 18-1 to 18-4. The number of passive optical fibers is not necessarily equal to the number of scintillating fibers.
- FIG. 5 is illustrated another embodiment of a collection assembly according to the invention.
- this is the connection mode between the collection device 1 according to the invention and the passive light guiding element 2. Consequently, all the elements which are common to these two embodiments bear identical reference numbers and will not be described again in detail.
- the collection device 1 and the light guide element 2 are each provided with an insert forming respectively first 22 and second 23 connection means.
- the first connection means 22 comprises a first part 23 hollowed out so as to receive the first end 14 of the scintillating fiber 4. To improve the immobilization of this first part 24, the latter is introduced inside the second end 15 of the opaque sheath 3. Furthermore, the insert 22 has a second part 25, opposite the first part 24, and provided with immobilization means which, in this example, are produced in the form of a thread. But they could be made in another form, such as for example in the form of latching means.
- the second insert 23 also has a first recessed part 26 intended to receive the first end 17 of the optical fiber of the passive light guide element 2.
- its first part 26 is introduced inside the opaque sheath 20 of the passive element 2.
- this second added piece 23 has a second part 27, opposite the first part 26, and provided with threading means complementary to those carried by the first insert 22.
- the immobilization means formed on the second part 27 could be latching means, or more generally means of form cooperation.
- the connection of the collection device 1 to the guide element passive light 2 is therefore carried out by screwing.
- only the collection device can be fitted with an insert, the second part 25 of which can be fitted with claws, or pliers, so as to grip the face outer of the opaque sheath 20 of the passive element 2.
- FIG. 6 is illustrated a variant of FIG. 5, in which the opaque sheath 3 of the collection device 1 does not comprise a single scintillating fiber, but four (4-1 to 4-4), as in the example. of FIG. 3.
- the collection device can, when it comprises a multiplicity of scintillating fibers 4-i, be used so as to carry out a double detection. Indeed, it may be particularly advantageous that a part of the scintillating fibers is used to detect only the ionizing radiation of beta type, while another part (or a single scintillating fiber only) is used to detect the ionizing radiation of gamma type or gamma type and beta type. To do this, the filter 9 may include a chosen area, of small extension, which does not provide the same filtering as its other parts.
- this chosen area is intended to be placed opposite a single scintillating fiber, or some, this (or these) scintillating fiber (s) being intended to be coupled (s) to one or more specific optical fibers connected, separately from the other optical fibers, to the detection device.
- scintillating element produced in the form of one or more scintillating fibers.
- this scintillating element can appear in many other forms. They may be scintillating grains, or scintillant crystals preferably chosen from the group comprising at least Csl, Nal and BGO, or alternatively a scintillant plastic with a density preferably between approximately 0.8 and 1 , 6 mg / cm 2 , or a scintillating liquid, or a scintillating gel. Scintillating grains can be obtained, for example, by grinding scintillating fibers.
- Scintillating plastics are particularly advantageous when the collection device has to convert only ionizing radiation of beta type, since by construction they block ionizing radiation of gamma type. Consequently, when a scintillating plastic is used, it suffices that the filter 9 is arranged so as to block the external photons (a black paper is therefore sufficient).
- An example of a collection device comprising a scintillating plastic disk, as a converter, is illustrated in FIG. 7, before assembly.
- the device is a converter of beta and gamma ionizing radiation.
- the scintillating conversion element is here produced in two parts.
- the first part 4a is placed downstream of the filter 9 and converts the ionizing radiation of beta type into photons. It is preferably a scintillating plastic.
- the second part 4b is placed downstream of the first part 4a and converted from ionizing radiation of gamma type into photons. They are preferably crystals of Csl or Nal or of BGO.
- the filter 9 only needs to block the photons. Therefore, a layer 12 of black paper is sufficient.
- the collection device 1 and the light guide element 2 are each provided with an insert forming respectively the first 22 and second 23 connection means. These are of a substantially equivalent type to that described above with reference to FIG. 5.
- the connection of the collection device 1 to the passive light guiding element 2 is therefore carried out by screwing.
- This invention also relates to the use of a collection device and of a collection assembly, as described above, for the detection of cells, or glands, or tumors, or metastases comprising radioactive nuclei (or markers) suitable for radiate ionizing radiation.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001578986A JP2003532084A (ja) | 2000-04-25 | 2001-04-24 | 電離放射線収集用シンチレーション光ファイバー装置 |
EP01971453A EP1277068A1 (fr) | 2000-04-25 | 2001-04-24 | Dispositif de collection de rayonnements ionisants avec fibre optique de scintillation |
AU2001295180A AU2001295180A1 (en) | 2000-04-25 | 2001-04-24 | Scintillating optical fibre device for collecting ionizing rays |
US10/279,970 US6703622B2 (en) | 2000-04-25 | 2002-10-25 | Scintillation optical fibre device for collecting ionizing radiation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR00/05253 | 2000-04-25 | ||
FR0005253A FR2808091B1 (fr) | 2000-04-25 | 2000-04-25 | Dispositif perfectionne de collection de rayonnements ionisants et ensemble de collection equipe d'un tel dispositif |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/279,970 Continuation US6703622B2 (en) | 2000-04-25 | 2002-10-25 | Scintillation optical fibre device for collecting ionizing radiation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001081950A1 true WO2001081950A1 (fr) | 2001-11-01 |
Family
ID=8849564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2001/001254 WO2001081950A1 (fr) | 2000-04-25 | 2001-04-24 | Dispositif de collection de rayonnements ionisants avec fibre optique de scintillation |
Country Status (6)
Country | Link |
---|---|
US (1) | US6703622B2 (fr) |
EP (1) | EP1277068A1 (fr) |
JP (1) | JP2003532084A (fr) |
AU (1) | AU2001295180A1 (fr) |
FR (1) | FR2808091B1 (fr) |
WO (1) | WO2001081950A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1912045A1 (fr) | 2006-10-12 | 2008-04-16 | Berthold Technologies GmbH & Co. KG | Dispositif de mesure d'un rayonnement ionisant |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2418015B (en) * | 2004-05-24 | 2006-12-20 | Symetrica Ltd | Gamma ray spectrometers |
US7639777B2 (en) * | 2008-02-26 | 2009-12-29 | United Technologies Corp. | Computed tomography systems and related methods involving forward collimation |
US8238521B2 (en) * | 2008-03-06 | 2012-08-07 | United Technologies Corp. | X-ray collimators, and related systems and methods involving such collimators |
US7876875B2 (en) * | 2008-04-09 | 2011-01-25 | United Technologies Corp. | Computed tomography systems and related methods involving multi-target inspection |
US7888647B2 (en) * | 2008-04-30 | 2011-02-15 | United Technologies Corp. | X-ray detector assemblies and related computed tomography systems |
US20090274264A1 (en) * | 2008-04-30 | 2009-11-05 | United Technologies Corp. | Computed Tomography Systems and Related Methods Involving Localized Bias |
WO2010060089A2 (fr) * | 2008-11-24 | 2010-05-27 | The Charles Stark Draper Laboratory, Inc. | Détecteur de rayonnement de scintillateur à fibre optique à discrimination renforcée |
DE102012100768A1 (de) | 2012-01-31 | 2013-08-01 | Endress + Hauser Gmbh + Co. Kg | Szintillationdetektor |
WO2017048239A1 (fr) | 2015-09-15 | 2017-03-23 | Halliburton Energy Services, Inc. | Détection de rayonnement photonique en fond de trou à l'aide de fibres scintillantes |
JP7491571B2 (ja) | 2020-12-02 | 2024-05-28 | 学校法人東京医科大学 | 医療用被ばく線量モニター |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4788436A (en) * | 1986-12-24 | 1988-11-29 | Walter Koechner | Radiation sensitive optical fiber and detector |
EP0604947A1 (fr) * | 1992-12-28 | 1994-07-06 | Tohoku Electric Power Co., Inc. | Dispositif pour la transmission de lumière produit par un détecteur de rayonnement |
US5635717A (en) * | 1992-07-17 | 1997-06-03 | Dimason | Apparatus for detecting and locating radioactive biological markers |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3227224B2 (ja) * | 1992-10-09 | 2001-11-12 | 日本原子力研究所 | 光学フィルターによりシンチレータ出力パルス波高及び立ち上がり時間が制御可能なホスウィッチ検出器 |
-
2000
- 2000-04-25 FR FR0005253A patent/FR2808091B1/fr not_active Expired - Fee Related
-
2001
- 2001-04-24 EP EP01971453A patent/EP1277068A1/fr not_active Withdrawn
- 2001-04-24 AU AU2001295180A patent/AU2001295180A1/en not_active Abandoned
- 2001-04-24 WO PCT/FR2001/001254 patent/WO2001081950A1/fr not_active Application Discontinuation
- 2001-04-24 JP JP2001578986A patent/JP2003532084A/ja active Pending
-
2002
- 2002-10-25 US US10/279,970 patent/US6703622B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4788436A (en) * | 1986-12-24 | 1988-11-29 | Walter Koechner | Radiation sensitive optical fiber and detector |
US5635717A (en) * | 1992-07-17 | 1997-06-03 | Dimason | Apparatus for detecting and locating radioactive biological markers |
EP0604947A1 (fr) * | 1992-12-28 | 1994-07-06 | Tohoku Electric Power Co., Inc. | Dispositif pour la transmission de lumière produit par un détecteur de rayonnement |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1912045A1 (fr) | 2006-10-12 | 2008-04-16 | Berthold Technologies GmbH & Co. KG | Dispositif de mesure d'un rayonnement ionisant |
US7629584B2 (en) | 2006-10-12 | 2009-12-08 | Berthold Technologies GmbH & Co. KG. | System for measuring ionizing radiation |
Also Published As
Publication number | Publication date |
---|---|
AU2001295180A1 (en) | 2001-11-07 |
FR2808091A1 (fr) | 2001-10-26 |
FR2808091B1 (fr) | 2002-07-05 |
JP2003532084A (ja) | 2003-10-28 |
EP1277068A1 (fr) | 2003-01-22 |
US6703622B2 (en) | 2004-03-09 |
US20030098418A1 (en) | 2003-05-29 |
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