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公开(公告)号：US5506408A
公开(公告)日：1996-04-09
申请号：US218361
申请日：1994-03-28
Applicant: David S. Vickers , Geoffrey G. Cochrane
Inventor： David S. Vickers , Geoffrey G. Cochrane
CPC classification number: G01T1/201 , A61B6/4258 , G01T1/1642 , G01T1/1644
Abstract: A gamma camera having separate detectors respectively to determine the spatial location and energy of gamma radiation emanating from a patient is disclosed. The preferred camera has two adjacent, mutually perpendicular arrays of parallel, coordinant signal producing scintillaters positioned on the face of a scintillating energy crystal. Each of the fibers within the arrays conducts light resulting from Compton events to an associated one of a set of photodetectors to produce coordinant signals. Other photodetectors monitor the total scintillated energy within the energy crystal. The energy crystal is of sufficient size to absorb energy remaining in each patient emitted gamma ray that has produced Compton events in the coordinant scintillators. The sum of the energies of substantially coincident signals from the fibers and the crystal is used to identify photo peak events.
Abstract translation: 公开了一种具有分别用于确定从患者发出的伽马辐射的空间位置和能量的分离的检测器的伽马相机。 优选的相机具有位于闪烁能量晶体的表面上的两个相邻的相互垂直的平行阵列，协调信号产生闪烁体。 阵列中的每个光纤将由康普顿事件产生的光传导到一组光电检测器中的相关联的一个以产生协调信号。 其他光电探测器监测能量晶体内的总闪烁能量。 能量晶体具有足够的尺寸以吸收在每个患者中剩余的能量，这些能量在发射的伽马射线中产生了协调闪烁体中的康普顿事件。 来自纤维和晶体的基本一致的信号的能量之和用于识别光峰事件。
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322.发明授权
公开(公告)号：US5420959A
公开(公告)日：1995-05-30
申请号：US149750
申请日：1993-11-17
Applicant: James K. Walker , Jacob R. Tymianski
Inventor： James K. Walker , Jacob R. Tymianski
CPC classification number: G01T1/201 , G01T1/203 , G02B6/02033
Abstract: A new scintillating optical fiber is used in an array as a scintillator plate for imaging with high energy radiation, particles and the like. The scintillating optical fiber has an inner plastic core fiber which is transparent to visible radiation and has an index of refraction of about 1.45 or greater. The inner plastic core fiber has a plastic cladding material which has an index of refraction less than that of the inner plastic core fiber. The inner plastic core fiber contains a polymeric matrix material; a metal moiety; and an organic fluorescent material. The scintillator plates are useful in producing high efficiency and high resolution radiographic systems for x-ray medical diagnosis or non-destructive inspection as well as non-destructive inspection with thermal neutrons. In medical x-ray applications, such as mammography, the need for lower doses of x-rays for a given image quality is met and exceeded by the higher detection efficiency of the scintillator plates and their associated electronic read-out system.
Abstract translation: 在阵列中使用新的闪烁光纤作为用于利用高能量辐射，粒子等进行成像的闪烁体板。 闪烁光纤具有对可见光辐射透明并具有约1.45或更高的折射率的内部塑料芯光纤。 内部塑料芯纤维具有塑料包层材料，其折射率小于内部塑料芯纤维的折射率。 内部塑料芯纤维含有聚合物基质材料; 金属部分; 和有机荧光材料。 闪烁体板可用于生产用于X射线医学诊断或非破坏性检查的高效率和高分辨率射线照相系统以及具有热中子的非破坏性检查。 在诸如乳房X线照相术的医学x射线应用中，由于闪烁体板及其相关联的电子读出系统的更高的检测效率，满足并超过给定图像质量的较低剂量的x射线的需要。
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323.发明授权Method and apparatus for determining and utilizing cross-talk adjusted scintillating fibers 失效用于确定和利用串扰调节的闪烁纤维的方法和装置
公开(公告)号：US5374824A
公开(公告)日：1994-12-20
申请号：US177743
申请日：1994-01-05
Applicant: Roy C. Chaney , Hilton Hammack , Ervin J. Fenyves , Pietro P. Antich
Inventor： Roy C. Chaney , Hilton Hammack , Ervin J. Fenyves , Pietro P. Antich
CPC classification number: G01T1/201
Abstract: An apparatus and method for determining the level of cross-talk between scintillating fibers and the secondary attenuation length corresponding to a desired level of cross-talk and for utilizing cross-talk adjusted scintillating fibers in a medical imaging system is provided by the present invention. An input device receives a secondary attenuation length, which is then stored by a memory device. A central processing unit determines a level of cross-talk between scintillating fibers by calculating an average number of visible light photons produced within the fibers due to simulated interaction of an energized particle within the fibers. An output device displays the level of cross-talk. The central processing unit may also determine a plurality of levels of cross-talk for a plurality of secondary attenuation lengths and select a desired secondary attenuation length corresponding to a desired level of cross-talk. Also provided are cross-talk adjusted scintillating fibers, which include a scintillating fiber, a primary dye, and a secondary dye distributed within the fiber to produce the desired level of photon cross-talk. Utilization of cross-talk adjusted scintillating fibers in medical imaging systems is also contemplated.
Abstract translation: 本发明提供了一种用于确定闪烁纤维之间的串扰水平和对应于期望的串扰水平以及用于在医学成像系统中利用串扰调节的闪烁纤维的二次衰减长度的装置和方法。 输入设备接收二次衰减长度，然后由存储器件存储。 中央处理单元通过计算由于光纤内的通电粒子的模拟相互作用而在纤维内产生的可见光光子的平均数目来确定闪烁纤维之间的串扰水平。 输出设备显示串扰级别。 中央处理单元还可以确定多个次级衰减长度的多个级别的串扰，并且选择对应于期望的串扰水平的期望的二次衰减长度。 还提供了串扰调节的闪烁纤维，其包括分布在纤维内的闪烁纤维，初级染料和次级染料，以产生所需水平的光子串扰。 也考虑在医学成像系统中利用串扰调节的闪烁纤维。
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324.发明授权High resolution gamma ray detectors for positron emission tomography (PET) and single photon emission computed tomography (SPECT) 失效高分辨率伽马射线探测器用于立体声发射测量（PET）和单光子发射计算机图像（SPECT）
公开(公告)号：US5103098A
公开(公告)日：1992-04-07
申请号：US433617
申请日：1989-11-09
Applicant: Ervin J. Fenyves
Inventor： Ervin J. Fenyves
CPC classification number: G01T1/201 , G01T1/2985 , A61B6/037
Abstract: A device and method for detecting gamma rays in a diagnostic imaging system preferably utilizing fast step index scintillating fibers and photomultipliers is provided by the present invention. A plurality of scintillating fibers are formed into layers comprising substantially parallel fibers positioned lengthwise each other in each layer. Each layer is positioned parallel each adjacent layer with each layer having its respective fibers at an angle of substantially either 60.degree. or 90.degree. to each adjacent layer. Preferably, position sensitive photomultipliers are provided and each photomultiplier is coupled to a plurality of fibers and each fiber has at least one end coupled to a photomultiplier. Data output from each photomultiplier is collected and processed to determine spatial coordinates of the origination position of a detected gamma ray. The present invention provides a high resolution gamma ray detector having an improved signal-to-noise ratio. This improves significantly the diagnostic power of the presently used PET and SPECT systems, and greatly extends the field of their application both in medical diagnosis and research. In addition, the present invention enables use of longer-lived positron emitting radioactive isotopes than presently used in typical PET systems.
Abstract translation: 本发明提供了一种用于在诊断成像系统中检测伽马射线的装置和方法，优选利用快速阶跃折射率闪烁光纤和光电倍增管。 多个闪烁纤维被形成为包括在每层中纵向彼此定位的基本上平行的纤维的层。 每个层平行于每个相邻层，每个层具有其各自的纤维与每个相邻层基本上为60°或90°的角度。 优选地，提供位置敏感的光电倍增管，并且每个光电倍增器耦合到多个光纤，并且每个光纤具有耦合到光电倍增管的至少一端。 收集并处理来自每个光电倍增管的数据输出，以确定检测到的伽马射线的起始位置的空间坐标。 本发明提供了具有改善的信噪比的高分辨率伽马射线检测器。 这显着改善了目前使用的PET和SPECT系统的诊断能力，并大大扩展了其在医学诊断和研究领域的应用领域。 此外，本发明能够使用比目前在典型PET系统中使用的长寿命正电子发射放射性同位素。
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公开(公告)号：US4788436A
公开(公告)日：1988-11-29
申请号：US158072
申请日：1988-02-12
Applicant: Walter Koechner
Inventor： Walter Koechner
Abstract: An optical fiber sensitive to nuclear radiation includes a thin filament core formed of a plastic scintillator material which scintillates in the presence of nuclear radiation. An optical cladding material is provided around the optical fiber. A second fiber is connected to the optical fiber for efficiently transmitting the scintillating light from the optical fiber to a radiation detector.
Abstract translation: 对核辐射敏感的光纤包括由在核辐射存在下闪烁的塑料闪烁体材料形成的细丝芯。 在光纤周围设置光学包覆材料。 第二光纤连接到光纤，用于将闪烁的光从光纤有效地传输到辐射检测器。
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Patent Agency Ranking
公开(公告)号：US3507734A
公开(公告)日：1970-04-21
申请号：US3507734D
申请日：1965-02-26
Applicant: ISOMET CORP
Inventor： RUDERMAN IRVING WARREN
CPC classification number: G01T1/201 , G01N23/043 , G01T1/1645 , G01T5/00 , Y10T156/1082
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公开(公告)号：US12092786B2
公开(公告)日：2024-09-17
申请号：US17977310
申请日：2022-10-31
Applicant: JEFFERSON SCIENCE ASSOCIATES, LLC
Inventor： John E. McKisson , Brian Kross , John McKisson
CPC classification number: G01V5/06 , G01T1/17 , G01T1/2006 , G01T1/201 , G01T1/20185 , G01T1/20188 , G01V5/045
Abstract: A subsurface continuous radioisotope environmental monitor that provides a continuous monitoring of the possible presence of radioactive species in subsurface groundwater. The detector and all supporting system elements are specifically constructed and equipped to be permanently mounted in a well or borehole to continuously detect and record radiation decay of radioactive species that are borne by subsurface water flow to that sampling area. The system operates by placing a detection element in a housing such that subsurface water that reaches the bore or well can flow in contact with the detection element. The system can employ several detection modes and materials. The detector includes SiPMs operating in a coincidence spectroscopy configuration to significantly reduce spurious signals due to thermal noise as well as increasing the total amount of signals collected.
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公开(公告)号：US11885919B2
公开(公告)日：2024-01-30
申请号：US17713393
申请日：2022-04-05
Applicant: CRYTUR, spol. s r.o.
Inventor： Jindrich Houzvicka , Silvia Sykorova , Patrik Hradecky
CPC classification number: G01T1/201 , G01T1/2023
Abstract: A calorimetric detector (1) for measuring energy of electrons and photons comprises a light energy absorber and scintillating fibers (2). The absorber is formed of a tungsten matrix (3), comprising a first assembly (4) and a second assembly (5) of parallel tungsten plates. The first assembly (4) is perpendicular to the second assembly (5) forming a grid, while each plate is in one half formed by alternating teeth (6) and gaps (7). The first assembly's (4) plates fit detachably with their teeth (6) into the gaps (7) of the second assembly (5) and vice versa. Spaces between the plates of the first assembly (4) and the second assembly (5) form longitudinal sections (8) with inner cross-section size of one pixel. The scintillating fibers (2) are longitudinally arranged, made of a single crystal material. The tungsten matrix (3) is in a protective metal frame (9) having tungsten inner walls (10).
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公开(公告)号：US09921172B2
公开(公告)日：2018-03-20
申请号：US13798179
申请日：2013-03-13
Applicant: Vega Americas, Inc.
Inventor： Bonaventure Cahill , Thomas Niinemets
CPC classification number: G01T1/201 , G01F23/288 , G01F23/2885 , G01T1/2006 , G01T1/202
Abstract: A nuclear level sensing gauge for measuring the level of product in a bin utilizes a plurality of scintillators arranged in a serial fashion. A source of nuclear radiation is positioned adjacent the bin, and the scintillators, which may be bundles of one or more scintillating fibers or scintillating crystals, are positioned in a serial fashion adjacent the bin opposite the source of nuclear radiation, such that nuclear radiation passing through the bin impinges upon the bundles. Light guides carry photons emitted by the scintillators—which are indicative of radiation passing through the bin—to a common photomultiplier tube. The tube is connected to electronics which convert counts of photons from the PMT into a measure of the level of radiation-absorbing product in the bin.
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公开(公告)号：US20170343681A1
公开(公告)日：2017-11-30
申请号：US15538599
申请日：2015-12-18
Inventor： Stéphane DARBON , Matthieu HAMEL , Adrien ROUSSEAU , Tony CAILLAUD
IPC: G01T1/20
CPC classification number: G01T1/201 , G01T1/2002
Abstract: A scintillator for imaging using X-rays or gamma rays or charged particles, includes a network of glass capillaries with an inner diameter no greater than 500 micrometres. The capillaries are filled with a polymer material made up of at least (i) a monomer selected from the group comprising vinyltoluene, styrene and vinylxylene and the isomers thereof, (ii) a cross-linking agent made up of a divinylbenzene or a dimethacrylate having a central chain which includes 1 to 12 carbon atoms, and (iii) triphenylbismuth. The cross-linking agent is provided to make up 10 wt % to 60% wt of the mixture thereof with the monomer, and the triphenylbismuth makes up at least 5 wt %. The cross-linking agent is provided in a ratio of 0.75 to 2.25 times the weight content of the triphenylbismuth.
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