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    • 22. 发明授权
    • Control apparatus for controlling radiotherapy irradiation system
    • 控制放射治疗照射系统的控制装置
    • US06891924B1
    • 2005-05-10
    • US09521217
    • 2000-03-08
    • Kiyoshi YodaYukimasa Aoki
    • Kiyoshi YodaYukimasa Aoki
    • A61N5/10
    • A61N5/1031
    • A control apparatus for a radiotherapy irradiation system in which a calculation time required for calculation to be performed after restrictions are modified is shortened. The control apparatus includes a unit for setting an initial solution indicating an initial irradiated beam weight, a unit for inputting restrictions according to a prescription, and a unit for setting an evaluation function under the restrictions. The control apparatus further includes a unit for iteratively calculating the evaluation function until the evaluation function is minimized and determining an irradiated beam weight optimizing irradiation, and unit for outputting an optimal solution indicating an optimal irradiated beam weight to the irradiation system. After restrictions are modified, a new evaluation function is set under the modified restrictions. An irradiated beam weight is then determined for optimizing irradiation. At this time, the initial solution setting unit adopts the previous optimal solution indicating an optimal irradiated beam weight, which is obtained before the restrictions are modified, as the initial solution indicating the initial irradiated beam weight.
    • 一种放射治疗照射系统的控制装置,其中在修改限制之后进行计算所需的计算时间被缩短。 控制装置包括:用于设定指示初始照射束权重的初始解的单元,用于根据处方输入限制的单元,以及用于设置限制下的评估功能的单元。 该控制装置还包括一个单元,用于迭代地计算评估函数,直到评估函数最小化并且确定照射的束权重优化照射,以及用于向照射系统输出指示最佳照射束权重的最佳解的单元。 修改限制后,将根据修改后的限制设置新的评估功能。 然后确定照射的束权重用于优化照射。 此时,初始溶液设定单元采用指示在限制修改之前获得的最佳照射束权重的先前最优解作为指示初始照射束重量的初始溶液。
    • 24. 发明授权
    • Irradiation dose calculation unit, irradiation dose calculation method and recording medium
    • 照射剂量计算单位,照射剂量计算方法和记录介质
    • US06222905B1
    • 2001-04-24
    • US09349459
    • 1999-07-09
    • Kiyoshi YodaNobuyuki Kanematsu
    • Kiyoshi YodaNobuyuki Kanematsu
    • A61N510
    • A61N5/1031
    • An irradiation dose calculating unit can solve a problem of a conventional irradiation dose calculating unit in that since irradiation doses from portals are empirically determined, it is likely that optimum irradiation doses are not established for a target and a critical organ. A prescription data input section is used for a physician to input prescription data designating doses to a target and a critical organ. First and second object function calculating sections each calculate predefined indices, and obtain a first object function representing the level of satisfaction for the critical organ and a second object function representing the level of satisfaction for the target and critical organ. The irradiation doses from the portals are calculated based on these object functions such that the prescription data are satisfied.
    • 照射剂量计算单元可以解决常规照射剂量计算单元的问题,因为从门户的照射剂量经验确定,对目标和关键器官可能没有建立最佳照射剂量。 处方数据输入部分用于医师输入指定剂量给目标和关键器官的处方数据。 第一和第二对象函数计算部分各自计算预定义的索引,并且获得表示关键器官的满足程度的第一对象函数和表示目标和关键器官的满意度的第二对象函数。 基于这些目标函数计算门户的照射剂量,使得处方数据得到满足。
    • 27. 发明授权
    • Magnetic resonance apparatus
    • 磁共振装置
    • US4924184A
    • 1990-05-08
    • US312149
    • 1989-02-21
    • Kiyoshi Yoda
    • Kiyoshi Yoda
    • G01R33/421A61B5/055A61B10/00G01R33/32G01R33/422H05K9/00
    • G01R33/422
    • A magnetic resonance apparatus comprising a magnet for generating a stationary magnetic field, a magnetic field gradient coil for generating gradient magnetic field pulses, and a radio frequency coil disposed within the magnet and the magnetic field gradient coil for transmitting radio frequency pulses and receiving a magnetic resonance signal. A radio frequency shield member is also disposed between the magnetic field gradient coil and the radio frequency coil. The radio frequency shield member includes a plurality of electrically conductive strips each extending in the direction of axis of the magnet and at least partly overlapping with respect to a neighboring conductor strip and a plurality of non-conductors sandwiched between the adjacent two conductive strips. A ring-shaped conductor having a capacitor inserted therein is disposed at each of the axial ends of the radio frequency coil along arcuated end portion of the radio frequency coil.
    • 一种包括用于产生固定磁场的磁体的磁共振装置,用于产生梯度磁场脉冲的磁场梯度线圈,以及设置在磁体内的射频线圈和用于发射射频脉冲并接收磁场的磁场梯度线圈 共振信号。 射频屏蔽构件也设置在磁场梯度线圈和射频线圈之间。 射频屏蔽构件包括多个导电条,其各自沿着磁体的轴线方向延伸,并且相对于相邻的导体条至少部分重叠,并且夹在相邻的两个导电条之间的多个非导体。 在射频线圈的弧形端部的射频线圈的各轴端设置有插入其中的电容器的环状导体。
    • 29. 发明授权
    • Adjustable radio frequency coil for nuclear magnetic resonance imaging
    • 用于核磁共振成像的可调射频线圈
    • US4720680A
    • 1988-01-19
    • US012446
    • 1987-02-09
    • Susumu NishiharaKiyoshi Yoda
    • Susumu NishiharaKiyoshi Yoda
    • G01R33/34G01R33/36G01R33/20
    • G01R33/34046G01R33/3628
    • A radio frequency coil for a nuclear magnetic resonance imaging apparatus comprises a plurality of arcuate, plate-like H-shaped members which are disposed about a common axis so as to form a tube. The flanges of adjacent H-shaped members are electrically connected. The web of at least one of the H-shaped members is cut in two at its midportion to form two T-shaped plates, and the legs of the T-shaped plates are connected by capacitive coupling in a manner which allows the capacitance to be varied. A conventional variable capacitor can be used to vary the capacitance. Alternatively, each H-shaped member is divided into two T-shaped plates with overlapping legs. A dielectric material is provided between the overlapping portions, and the capacitance is varied by moving the T-shaped plates with respect to one another in the longitudinal direction of the tube so as to vary the size of the overlapping portions.
    • 用于核磁共振成像装置的射频线圈包括围绕公共轴设置以形成管的多个弓形的板状H形构件。 相邻H形构件的凸缘电连接。 H形构件中的至少一个的腹板在其中部切割成两个,以形成两个T形板,并且T形板的腿通过电容耦合以允许电容为 多变。 可以使用常规的可变电容器来改变电容。 或者,每个H形构件被分成具有重叠腿的两个T形板。 电介质材料设置在重叠部分之间,电容通过沿着管的纵向方向相对于彼此移动T形板来改变,以便改变重叠部分的尺寸。