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    • 2. 发明授权
    • X-ray CT apparatus and X-ray imaging method
    • X射线CT装置和X射线成像方法
    • US06434214B1
    • 2002-08-13
    • US09869899
    • 2001-07-09
    • Hiroyuki KawaiKenichi Okajima
    • Hiroyuki KawaiKenichi Okajima
    • A61B600
    • A61B6/583A61B6/032
    • An X-ray CT apparatus includes a scanner mounted with a detection system having an X-ray source for generating X-rays applied radially to an object and a detector arranged so as to be opposite to the X-ray source and adapted to detect the image of the transmitted X-rays transmitted through the object, wherein the scanner is rotated around the object. A three-dimensional X-ray absorption coefficient distribution image of the object is reconstructed from the transmitted X-ray image and the rotation-axis projection position which is the position where the rotation center of the scanner is projected on the detection plane of a two-dimensional sensor constituting the detector is decided. On the basis of the contrast of the X-ray absorption coefficient distribution image reconstructed by using the decided rotation-axis projection position, the rotation-axis projection position is estimated, and an X-ray tomographic image or/and a three dimensional X-ray image of the object is generated.
    • X射线CT装置包括:扫描器,其安装有具有X射线源的检测系统,该X射线源用于产生径向施加于物体的X射线;以及检测器,被布置为与X射线源相对,并且适于检测 通过物体透射的透射X射线的图像,其中扫描器围绕物体旋转。 从传送的X射线图像和旋转轴投影位置重建物体的三维X射线吸收系数分布图像,旋转轴投影位置是将扫描仪的旋转中心投影在两个检测平面上的位置 决定构成检测器的三维传感器。 基于通过使用所确定的旋转轴投影位置重建的X射线吸收系数分布图像的对比度,估计旋转轴投影位置,并且X射线断层图像和/ 生成对象的射线图像。
    • 3. 发明授权
    • Biomagnetic field measuring method and apparatus
    • 生物磁场测量方法及装置
    • US06230037B1
    • 2001-05-08
    • US09035827
    • 1998-03-06
    • Keiji TsukadaAkihiko KandoriKenichi OkajimaHitoshi SasabuchiHiroyuki SuzukiShoji KondoYasuaki Komiyama
    • Keiji TsukadaAkihiko KandoriKenichi OkajimaHitoshi SasabuchiHiroyuki SuzukiShoji KondoYasuaki Komiyama
    • A61B505
    • A61B5/04005G01R33/0354G01R33/10
    • A biomagnetic field measuring apparatus has a plurality of fluxmeters disposed externally of a living body and each including a superconducting quantum interference device (SQUID) for detecting a biomagnetic field generated from the living body, the plurality of fluxmeters being operative to detect a temporal change of a component of the biomagnetic field in a first direction which is normal to the surface of the living body, an operation processor for performing computation for determining a temporal change of a value proportional to a root of square sum of differential values of the first-direction magnetic field component in second and third directions which cross the first direction and computation for integrating the temporal change of the value over a predetermined interval to determine an integral value, and a display for displaying the determined integral value. Distribution of magnetic fields generated from the heart is determined with a small number of fluxmeters.
    • 生物磁场测量装置具有设置在生物体的外部的多个磁通量计,每个磁通量计包括用于检测从生物体产生的生物磁场的超导量子干涉装置(SQUID),所述多个磁通量计可操作以检测时间变化 与生物体表面正交的第一方向的生物磁场的分量,运算处理器,用于进行计算,以确定与第一方向的差分值的平方和的根数成比例的值的时间变化 与第一方向交叉的第二方向和第三方向的磁场分量和用于对预定间隔内的值的时间变化进行积分的运算以确定积分值,以及用于显示所确定的积分值的显示。 由心脏产生的磁场的分布由少量的磁通计确定。
    • 4. 发明授权
    • Inspection apparatus using nuclear magnetic resonance
    • 使用核磁共振的检查装置
    • US5928146A
    • 1999-07-27
    • US815069
    • 1997-03-11
    • Hiroyuki ItagakiKenichi OkajimaTetsuhiko TakahashiKenji Takiguchi
    • Hiroyuki ItagakiKenichi OkajimaTetsuhiko TakahashiKenji Takiguchi
    • G01R33/561A61B5/055
    • G01R33/56554
    • An inspection apparatus using nuclear magnetic resonance having arithmetic and control means for controlling a pulse sequence for detecting a nuclear magnetic resonance signal from a target to be inspected and calculating the detected signal. The arithmetic and control means controls an echo planar pulse sequence for acquiring a plurality of images of a predetermined same region of the target to be inspected; and arranges echo signal data obtained by measuring the inspection target by the echo planar pulse sequence and forms an EPI data set; designates a plurality of data points in k-space as observed points; designates a predetermined EPI data set to reference data for body motion for correcting influence by the body motion of the inspection target and calculates a reference phase as a phase of the body motion reference data at the observed points; calculates the phase of the EPI data set at the observed points; calculates a body motion correcting value expressing the influence by the body motion of the inspection target by using the phase difference between the phase of the EPI data set and the reference phase; and executes a process for eliminating the influence by the body motion of the inspection target by removing the phase difference of the EPI data set of the target to be inspected by using the body motion correction values.
    • 一种使用核磁共振的检查装置,具有算术和控制装置,用于控制用于检测来自待检查目标的核磁共振信号的脉冲序列,并计算检测信号。 算术和控制装置控制回波平面脉冲序列,用于获取待检查目标的预定相同区域的多个图像; 并且通过回波平面脉冲序列排列通过测量检查对象获得的回波信号数据,并形成EPI数据组; 指定k空间中的多个数据点作为观察点; 将预定的EPI数据集指定为身体运动的参考数据,以校正由检查对象的身体运动产生的影响,并计算参考相位作为观察点处的身体运动参考数据的相位; 计算观测点处EPI数据集的相位; 通过使用EPI数据集的相位与参考相位之间的相位差来计算表示由检查对象的身体运动产生的影响的身体运动校正值; 并且通过使用身体运动校正值来去除被检查对象的EPI数据集的相位差来消除检查对象的身体运动的影响的处理。
    • 6. 发明授权
    • Information reading apparatus for radiation image
    • 辐射图像信息读取装置
    • US4806757A
    • 1989-02-21
    • US924735
    • 1986-10-30
    • Tsuyoshi KanoTetsuhiko TakahashiKenichi OkajimaKenji UmetaniSaburo AtakaHisatake YokouchiRyuichi Suzuki
    • Tsuyoshi KanoTetsuhiko TakahashiKenichi OkajimaKenji UmetaniSaburo AtakaHisatake YokouchiRyuichi Suzuki
    • C09K11/61G01T1/29G21K4/00G02B26/10
    • C09K11/616G01T1/2012G01T1/2014G21K4/00
    • When the laser-stimulable phosphor plate of an information reading apparatus for radiation image is constituted of CsI as the base and 0.0003 to 0.03% in atomic ratio of Na, the output signal of the information reading apparatus can be increased and the decay time thereof can be shortened. When output signals are produced by detecting fluorescence emitted from a fluoroscopic plate disposed in confrontation with the laser-stimulable phosphor plate, there is provided an information reading apparatus for radiation image having an improved S/N ratio and a high efficiency of taking in laser-stimulated luminescence. Further, instead of Na or together with Na, there may be added at least one element selected from the group consisting of Li, K, Rb, Cu, Au, Be, Mg, Ca, Sr, Ba, Zn, Cd, Hg, B, Al, Ga, In, Tl, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Si, Ti, Zr, Ge, Sn, Pb, As, Sb, and Bi. In this case, the total content of these elements is set to be 0.00001 to 1% in atomic ratio.
    • 当用于放射线图像的信息读取装置的激光可刺激的磷光体板以CsI为基准,以Na原子比为0.0003〜0.03%时,信息读取装置的输出信号可以增加,其衰减时间可以 缩短。 当通过检测由与激光可激发的荧光体板对置设置的荧光检查板发出的荧光而产生输出信号时,提供了一种具有改善的S / N比和具有高激光吸收能力的高效率的放射线图像的信息读取装置, 刺激发光。 此外,代替Na或与Na一起,可以添加至少一种选自Li,K,Rb,Cu,Au,Be,Mg,Ca,Sr,Ba,Zn,Cd,Hg, B,Al,Ga,In,Tl,Sc,Y,La,Ce,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Si,Ti,Zr,Ge, Sn,Pb,As,Sb和Bi。 在这种情况下,这些元素的总含量以原子比设定为0.00001〜1%。
    • 10. 发明授权
    • X-ray CT apparatus
    • X射线CT装置
    • US06580777B1
    • 2003-06-17
    • US09869851
    • 2001-07-05
    • Hironori UekiKenichi Okajima
    • Hironori UekiKenichi Okajima
    • A61B602
    • A61B6/4447A61B6/027A61B6/032A61B6/4291
    • An x-ray CT apparatus of the invention includes: a scanner (4) having an x-ray source (1) for generating radial x-rays emitted to an object (8) and a detector (3) provided to face the x-ray source and acquiring a projection of the object; a rotation controler (102) for rotating the scanner around the object; a gantry-tilt angle controler (104) for changing a tilt angle formed between a surface of rotation of the scanner and a body axis of the object; processing unit (106) for generating a CT image of the object from the projections acquired from a plurality of directions while rotating the scanner and changing the tilt angle; and display unit (107) for displaying a three-dimensional CT image of high picture quality.
    • 本发明的X射线CT装置包括:扫描器(4),其具有用于产生发射到物体(8)的径向X射线的X射线源(1)和设置成面对x射线的检测器(3) 并获取对象的投影; 旋转控制器(102),用于围绕物体旋转扫描仪; 用于改变在所述扫描器的旋转表面与所述物体的体轴之间形成的倾斜角的台架倾斜角度控制器(104) 处理单元(106),用于在旋转扫描仪并改变倾斜角度的同时从多个方向获取的投影产生物体的CT图像; 以及用于显示高图像质量的三维CT图像的显示单元(107)。