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公开(公告)号：US09880236B2
公开(公告)日：2018-01-30
申请号：US13874795
申请日：2013-05-01
发明人： Takayuki Obata , Taiga Yamaya , Iwao Kanno , Hitoshi Yamagata , Takuzo Takayama , Kazuya Okamoto
CPC分类号： G01R33/28 , A61B5/0035 , A61B5/055 , A61B6/037 , A61B6/4417 , G01R33/481 , G01T1/1603
摘要： In a PET (Positron Emission Tomography)-MRI (Magnetic Resonance Imaging) apparatus of an embodiment, a magnet that is a seamless structure generates a static magnetic field in a bore having a cylindrical shape. First detectors and second detectors are each formed in a ring shape and detect gamma rays emitted from positron emitting radionuclides injected into a subject. The first detectors and the second detectors are disposed with a space therebetween in an axial direction of the bore so as to interpose the magnetic field center of the static magnetic field therebetween.
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公开(公告)号：US20130324836A1
公开(公告)日：2013-12-05
申请号：US13938592
申请日：2013-07-10
发明人： Taiga YAMAYA , Takayuki Obata , Iwao Kanno , Takuzo Takayama , Hitoshi Yamagata , Kazuya Okamoto
CPC分类号： G01T1/164 , A61B6/037 , A61B6/4417 , A61B6/5229 , G01R33/4808 , G01R33/481 , G01T1/2985
摘要： In a PET device according to an embodiment, a first detector includes a plurality of first scintillators and detects gamma rays that are emitted from positron-emitting radionuclides that are injected into a subject. A second detector is provided on the outer circumferential side of the first detector, includes a plurality of second scintillators arranged in an arrangement surface density lower than that of the first scintillators, and detects gamma rays that have passed through the first detector. A counted information acquiring unit acquires, as first counted information and second counted information, the detection positions, energy values, and detection time regarding gamma rays detected by the first detector and the second detector. Based on the detection time contained in each of the first counted information and the second counted information, an energy value adder generate corrected counted information by summing the energy values contained in the first counted information and the second counted information.
摘要翻译： 在根据实施例的PET装置中，第一检测器包括多个第一闪烁体并且检测从注射到对象中的正电子发射放射性核素发射的伽马射线。 第二检测器设置在第一检测器的外圆周侧，包括以比第一闪烁体低的布置表面密度布置的多个第二闪烁体，并且检测已经通过第一检测器的伽马射线。 计数信息获取单元获取由第一检测器和第二检测器检测的关于伽马射线的检测位置，能量值和检测时间作为第一计数信息和第二计数信息。 基于包含在第一计数信息和第二计数信息中的检测时间，能量值加法器通过将包含在第一计数信息和第二计数信息中的能量值相加来生成校正的计数信息。
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公开(公告)号：US09864028B2
公开(公告)日：2018-01-09
申请号：US13873706
申请日：2013-04-30
发明人： Iwao Kanno , Takayuki Obata , Taiga Yamaya , Kazuya Okamoto , Takuzo Takayama , Hitoshi Yamagata
CPC分类号： G01R33/422 , A61B5/0035 , A61B5/055 , A61B6/037 , A61B6/4417 , A61B6/5235 , A61B6/5247 , G01R33/481 , G01T1/1603
摘要： In a PET (Positron Emission Tomography)-MRI (Magnetic Resonance Imaging) apparatus of an embodiment, a transmitting radio frequency coil applies a radio frequency magnetic field on a subject placed in a static magnetic field. A detector is formed in a ring shape, disposed on a side adjacent to an outer circumference of the transmitting radio frequency coil, includes at least two PET detectors disposed with a space therebetween in an axial direction of a bore so as to interpose the magnetic field center of the static magnetic field therebetween, and detects gamma rays emitted from positron emitting radionuclides injected into the subject. Radio frequency shields are each formed in an approximately cylindrical shape, disposed between the transmitting radio frequency coil and the detector, and shield the radio frequency magnetic field generated by the transmitting radio frequency coil.
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公开(公告)号：US10234570B2
公开(公告)日：2019-03-19
申请号：US13938592
申请日：2013-07-10
申请人： Toshiba Medical Systems Corporation , National Institutes for Quantum and Radiological Science and Technology
发明人： Taiga Yamaya , Takayuki Obata , Iwao Kanno , Takuzo Takayama , Hitoshi Yamagata , Kazuya Okamoto
摘要： In a PET device, a first detector includes a plurality of first scintillators and detects gamma rays emitted from positron-emitting radionuclides injected into a subject. A second detector is provided on the outer circumferential side of the first detector, includes a plurality of second scintillators arranged in an arrangement surface density lower than that of the first scintillators, and detects gamma rays that have passed through the first detector. A counted information acquiring unit acquires, as first counted information and second counted information, the detection positions, energy values, and detection time regarding gamma rays detected by the first detector and the second detector. Based on the detection time contained in each of the first counted information and the second counted information, an energy value adder generate corrected counted information by summing the energy values contained in the first counted information and the second counted information.
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