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公开(公告)号：US20160095560A1
公开(公告)日：2016-04-07
申请号：US14966164
申请日：2015-12-11
发明人： Hiroaki NAKAI
CPC分类号： A61B6/4241 , A61B6/03 , A61B6/4035 , A61B6/4233 , A61B6/482 , A61B6/5205 , A61B6/54 , A61B2562/066 , G01T1/1603 , G01T1/2985 , G06T11/005 , G06T2207/10081
摘要： An X-ray CT apparatus according to an embodiment includes a detector, counted result collecting circuitry, count rate calculating circuitry, control circuitry, and image reconstruction circuitry. The detector includes a plurality of detection elements including a plurality of types of detection elements with different response characteristics to an X-ray dose, and outputs a detection signal according to an incidence of an X-ray photon to each of the detection elements. The counted result collecting circuitry collects counted results obtained by counting X-ray photons from detection signals output by the detection elements. The count rate calculating circuitry calculates a count rate from the detection signals output by the detection elements. The control circuitry selects a detection element based on the count rate and respective response characteristics of the detection elements. The image reconstruction circuitry reconstructs X-ray CT image data using the counted result obtained from the detection element selected by the control circuitry.
摘要翻译： 根据实施例的X射线CT装置包括检测器，计数结果收集电路，计数率计算电路，控制电路和图像重构电路。 检测器包括多个检测元件，其包括对X射线剂量具有不同响应特性的多种检测元件，并且根据X射线光子的入射点向每个检测元件输出检测信号。 计数结果收集电路通过由检测元件输出的检测信号计数X射线光子而获得的计数结果。 计数率计算电路根据由检测元件输出的检测信号计算计数率。 控制电路基于检测元件的计数率和各自的响应特性来选择检测元件。 图像重建电路使用从控制电路选择的检测元件获得的计数结果重建X射线CT图像数据。
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公开(公告)号：US20160022243A1
公开(公告)日：2016-01-28
申请号：US14873710
申请日：2015-10-02
发明人： Hiroaki NAKAI , Daizo OIKAWA
CPC分类号： A61B6/4241 , A61B6/032 , A61B6/0407 , A61B6/06 , A61B6/4035 , A61B6/4042 , A61B6/4085 , A61B6/4208 , A61B6/4233 , A61B6/461 , A61B6/482 , A61B6/483 , A61B6/58 , G06F19/00
摘要： An X-ray computed tomography apparatus according to an embodiment stores a plurality of reference count data indicative of energy spectra of X-rays, which are associated with a plurality of tube voltages or tube currents. Estimation circuitry estimates a tube voltage or a tube current at a time of X-ray irradiation, based on a comparison of energy spectra between second count data and each of the plurality of reference count data. Correction circuitry corrects first count data acquired together with the second count data, by using an energy spectrum calculated based on the estimated tube voltage or tube current. Reconstruction circuitry reconstructs medical image data, based on the corrected first count data.
摘要翻译： 根据实施例的X射线计算机断层摄影装置存储指示与多个管电压或管电流相关联的X射线的能谱的多个参考计数数据。 基于第二计数数据与多个参考计数数据中的每一个之间的能量谱的比较，估计电路估计X射线照射时的管电压或管电流。 校正电路通过使用基于估计的管电压或管电流计算的能谱来校正与第二计数数据一起获取的第一计数数据。 重建电路基于校正的第一计数数据重建医学图像数据。
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3.发明申请X-RAY CT APPARATUS, IMAGE PROCESSING APPARATUS, AND IMAGE PROCESSING METHOD 有权X射线CT装置，图像处理装置和图像处理方法公开(公告)号：US20150287193A1
公开(公告)日：2015-10-08
申请号：US14744645
申请日：2015-06-19
发明人： Tooru KATO , Daizo OIKAWA , Hiroaki NAKAI
CPC分类号： G06T7/0012 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/5205 , G06K9/46 , G06K2009/4666 , G06T5/001 , G06T11/005 , G06T2207/10081 , G06T2207/10116 , G06T2211/408
摘要： An X-ray CT apparatus according to an embodiment includes acquiring circuitry and processing circuitry. The acquiring circuitry is configured to count photons derived from X-rays that have passed through a subject and to acquire a result obtained by discriminating energy levels of the counted photons as a counting result. The processing circuitry is configured to notify the acquiring circuitry of an energy dividing set that is set in accordance with an X-ray absorption characteristic of a substance designated by an operator, to receive the counting result acquired by the acquiring circuitry by allocating a counted value to each of a plurality of energy discrimination regions that are set in the energy dividing set, and to reconstruct image data by using the received counting result.
摘要翻译： 根据实施例的X射线CT装置包括采集电路和处理电路。 获取电路被配置为对已经通过被摄体的X射线衍生的光子进行计数，并且获得通过将计数的光子的能级判别为计数结果而获得的结果。 所述处理电路被配置为向所述获取电路通知根据由操作者指定的物质的X射线吸收特性设置的能量分配集，以通过分配计数值来接收由所述获取电路获取的计数结果 分配给能量分割集中的多个能量鉴别区域中的每一个，并且通过使用所接收的计数结果来重构图像数据。
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公开(公告)号：US20160135774A1
公开(公告)日：2016-05-19
申请号：US14944745
申请日：2015-11-18
发明人： Toshiyuki ONO , Takashi IDA , Shuhei NITTA , Hiroaki NAKAI
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482 , G06T11/005 , G06T2211/408
摘要： According to an embodiment, an X-ray computed tomography apparatus includes processing circuitry. The processing circuitry is configured to acquire first projection data that is based on a first spectrum representing an amount of radioactive rays in a unit of energy of the radioactive rays having passed through a subject and detected by a detector. The processing circuitry is configured to generate second projection data by correcting the first projection data based on a response characteristic of the detector. The processing circuitry is configured to operate reconstruction process to the second projection data.
摘要翻译： 根据实施例，X射线计算机断层摄影装置包括处理电路。 处理电路被配置为获取第一投影数据，该第一投影数据基于表示通过被检体并通过检测器检测的放射线的能量单位的放射线的量的第一光谱。 处理电路被配置为通过基于检测器的响应特性校正第一投影数据来产生第二投影数据。 处理电路被配置为对第二投影数据进行重建处理。
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5.发明申请X-RAY COMPUTED TOMOGRAPHY APPARATUS, IMAGE PROCESSING APPARATUS, AND IMAGE PROCESSING METHOD 审中-公开X射线计算机图像设备，图像处理设备和图像处理方法公开(公告)号：US20160058404A1
公开(公告)日：2016-03-03
申请号：US14842111
申请日：2015-09-01
发明人： Shuhei NITTA , Taichiro SHIODERA , Tomoyuki TAKEGUCHI , Hidenori TAKESHIMA , Toshiyuki ONO , Takashi IDA , Hiroaki NAKAI
CPC分类号： G06T11/005 , A61B6/032 , A61B6/4241 , A61B6/481 , A61B6/482 , A61B6/5205 , G01N23/046 , G01N23/087 , G06T2211/408
摘要： An X-ray computed-tomography (CT) apparatus of an embodiment includes an X-ray tube, an X-ray detector, and processing circuitry. The X-ray tube is configured to generate an X-ray. The X-ray detector includes a plurality of X-ray detection elements configured to output a signal based on the X-ray entered therein. The processing circuitry is configured to derive a constraint condition by using at least one piece of projection data out of a plurality of pieces of projection data corresponding energy bins of which differ at least partially, calculate an effective length that is a total length for which the X-ray has passed through a region in which a material to be decomposed is present, and generate image data showing information about the material by using the projection data and the effective length.
摘要翻译： 实施例的X射线计算机断层摄影（CT）装置包括X射线管，X射线检测器和处理电路。 X射线管被配置成产生X射线。 X射线检测器包括多个X射线检测元件，其被配置为基于输入的X射线输出信号。 处理电路被配置为通过使用至少部分不同的多个投影数据对应的能量箱中的至少一条投影数据来导出约束条件，计算作为总长度的有效长度， X射线已经通过其中存在待分解材料的区域，并且通过使用投影数据和有效长度生成表示关于材料的信息的图像数据。
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公开(公告)号：US20160038108A1
公开(公告)日：2016-02-11
申请号：US14885621
申请日：2015-10-16
发明人： Emi TAMURA , Yasuo SAITO , Takuzo TAKAYAMA , Hiroaki MIYAZAKI , Hiroaki NAKAI
CPC分类号： A61B6/4042 , A61B6/032 , A61B6/06 , A61B6/405 , A61B6/481 , A61B6/482 , A61B6/5211 , A61B6/54
摘要： According to one embodiment, there is provided an X-ray CT apparatus which comprises high voltage generation processing circuitry configured to selectively generate a first voltage and a second voltage higher than the first tube voltage; a first filter formed from a material having substantially the same atomic number as that of a contrast material to be administered to an object and configured to perform radiation quality adjustment; a second filter formed from a material different from the contrast material and configured to perform radiation quality adjustment; a filter switching mechanism configured to switch between the first filter and the second filter to be interposed between a X-ray tube and the object; and control processing circuitry configured to control the high voltage generation unit and the filter switching mechanism to synchronize switching between the first voltage and the second voltage with switching between the first filter and the second filter.
摘要翻译： 根据一个实施例，提供了一种X射线CT装置，其包括被配置为选择性地产生高于第一管电压的第一电压和第二电压的高电压产生处理电路; 第一过滤器，由具有与要被施用于物体的造影材料基本上相同的原子序数的材料形成，并被配置为进行辐射质量调整; 由不同于造影材料的材料形成并被配置为执行辐射质量调节的第二过滤器; 滤波器切换机构，被配置为在所述第一滤波器和所述第二滤波器之间切换以插入在X射线管与所述物体之间; 以及控制处理电路，被配置为通过在第一滤波器和第二滤波器之间切换来控制高电压产生单元和滤波器切换机构来同步第一电压和第二电压之间的切换。
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公开(公告)号：US20150282778A1
公开(公告)日：2015-10-08
申请号：US14744082
申请日：2015-06-19
发明人： Tooru KATO , Hiroaki NAKAI , Kanta KOBUCHI
CPC分类号： A61B6/482 , A61B6/032 , A61B6/42 , A61B6/4208 , A61B6/4233 , A61B6/4241 , A61B6/4452 , A61B6/488 , A61B6/5205 , A61B6/54 , A61B6/542 , A61B6/544 , A61B6/545 , G06T11/005 , G06T2211/408
摘要： An X-ray CT apparatus includes: intensity distribution data acquiring circuitry is configured to acquire, by performing a first scan, intensity distribution data of X-rays being radiated from an X-ray tube and having passed through a subject; scan controlling circuitry is configured to estimate an X-ray dose with which it is possible to discriminate individual X-ray photons having passed through the subject based on the intensity distribution data and to cause a second scan that is for a photon counting CT purpose to be performed by causing the estimated dose of X-rays to be radiated from the X-ray tube to the subject; a counting result acquiring circuitry is configured to acquire, by the second scan, a counting result by counting the X-ray photons being radiated from the X-ray tube and having passed through the subject; and an image reconstructing circuitry is configured to reconstruct X-ray CT image data based on the counting result.
摘要翻译： X射线CT装置包括：强度分布数据获取电路被配置为通过执行第一扫描来获取从X射线管辐射并穿过被摄体的X射线的强度分布数据; 扫描控制电路被配置为估计X射线剂量，通过该X射线剂量可以基于强度分布数据来区分已经通过对象的各个X射线光子，并且引起用于光子计数CT目的的第二扫描 通过使X射线的估计剂量从X射线管照射到被检体来进行; 计数结果获取电路被配置为通过对从X射线管辐射并已通过被摄体的X射线光子进行计数来获取计数结果; 并且图像重构电路被配置为基于计数结果重建X射线CT图像数据。
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8.发明申请X-RAY CT APPARATUS, IMAGE PROCESSING APPARATUS, AND IMAGE PROCESSING METHOD 审中-公开X射线CT装置，图像处理装置和图像处理方法公开(公告)号：US20160095564A1
公开(公告)日：2016-04-07
申请号：US14872478
申请日：2015-10-01
发明人： Tooru KATO , Hiroaki NAKAI
CPC分类号： A61B6/4241 , A61B6/032 , A61B6/4208 , A61B6/4233 , A61B6/52
摘要： An X-ray computed tomography (CT) apparatus according to an embodiment includes a photon-counting detector, correction circuitry, and reconstruction circuitry. The photon-counting detector includes a plurality of X-ray detection elements detecting X-ray photons applied from an X-ray tube. The correction circuitry corrects detection signals detected by the photon-counting detector for the respective X-ray detection elements, based on a centroid of an X-ray spectrum detected by the photon-counting detector. The reconstruction circuitry reconstructs a CT image based on the corrected detection signals.
摘要翻译： 根据实施例的X射线计算机断层摄影（CT）装置包括光子计数检测器，校正电路和重建电路。 光子计数检测器包括检测从X射线管施加的X射线光子的多个X射线检测元件。 校正电路基于由光子计数检测器检测的X射线光谱的质心，校正由各个X射线检测元件的光子计数检测器检测的检测信号。 重建电路基于校正的检测信号重建CT图像。
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公开(公告)号：US20160054454A1
公开(公告)日：2016-02-25
申请号：US14831086
申请日：2015-08-20
发明人： Tooru KATO , Hiroaki NAKAI , Mikihito HAYASHI
CPC分类号： G01N23/046 , G01N2223/505 , G01T1/17 , G01T1/2002 , G01T1/2985
摘要： An X-ray computer tomography (CT) apparatus according to an embodiment includes an X-ray source, an X-ray detector, and generating circuitry. The X-ray source radiates X-rays. The X-ray detector includes a scintillator including a first region close to the X-ray source and a second region distant from the X-ray source, an optical sensor that detects scintillator light obtained by converting the X-rays radiated from the X-ray source with the scintillator, and a variable layer that is provided in the scintillator and switchable between a first state in which the variable layer transmits the scintillator light between the first region and the second region and a second state in which the variable layer does not transmit the scintillator light between the first region and the second region. The generating circuitry generates a CT image based on a signal output from the X-ray detector.
摘要翻译： 根据实施例的X射线计算机断层摄影（CT）装置包括X射线源，X射线检测器和发生电路。 X射线源辐射X射线。 X射线检测器包括闪烁体，其包括靠近X射线源的第一区域和远离X射线源的第二区域;光学传感器，其检测通过将从X射线源辐射的X射线转换得到的闪烁体光， 以及设置在所述闪烁器中的可变层，并且在所述可变层透射所述第一区域和所述第二区域之间的所述闪烁体光的第一状态和所述可变层不在所述第二状态之间切换的可变层 在第一区域和第二区域之间传输闪烁体光。 生成电路基于从X射线检测器输出的信号生成CT图像。
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公开(公告)号：US20160054453A1
公开(公告)日：2016-02-25
申请号：US14832332
申请日：2015-08-21
发明人： Kenta MORIYASU , Taichiro SHIODERA , Shuhei NITTA , Tomoyuki TAKEGUCHI , Hidenori TAKESHIMA , Toshiyuki ONO , Takashi IDA , Hiroaki NAKAI
IPC分类号： G01T1/17 , G01N23/04 , G01N23/087 , G01T1/29
摘要： A photon counting X-ray CT apparatus according to an embodiment includes: data acquiring circuitry, and processing circuitry. The data acquiring circuitry is configured to allocate energy measured by signals output from a photon counting detector in response to incidence of X-ray photons to any of a plurality of first energy bins so as to acquire a first data group as count data of each of the first energy bins. The processing circuitry is configured to determine a plurality of second energy bins obtained by grouping the first energy bins in accordance with a decomposition target material that is a material to be decomposed in a imaging region, allocate the first data group to any of the second energy bins so as to generate a second data group, and use the second data group to generate an image representing a distribution of the decomposition target material.
摘要翻译： 根据实施例的光子计数X射线CT装置包括：数据获取电路和处理电路。 数据采集电路被配置为响应于X射线光子对多个第一能量箱中的任何一个的入射而分配从光子计数检测器输出的信号测量的能量，以便获取第一数据组作为每个的计数数据 第一个能量箱。 处理电路被配置为确定通过根据在成像区域中要分解的材料的分解目标材料对第一能量箱进行分组而获得的多个第二能量箱，将第一数据组分配给任何第二能量 以生成第二数据组，并且使用第二数据组来生成表示分解目标材料的分布的图像。
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