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    • 2. 发明授权
    • Miniature energy transducer for emitting x-ray radiation including schottky cathode
    • 用于发射包括肖特基阴极的X射线辐射的微型能量换能器
    • US06463124B1
    • 2002-10-08
    • US09596530
    • 2000-06-19
    • Effraim WeismanNathan SelaDan HashimshonyUriel HalaveeGuy ShinarGilad Marcus
    • Effraim WeismanNathan SelaDan HashimshonyUriel HalaveeGuy ShinarGilad Marcus
    • H01J3506
    • A61N5/1001A61N5/1002H01J35/065H01J35/32H01J2201/342H01J2235/06H01J2235/164
    • An apparatus provides in-situ radiation treating utilizing a miniature energy transducer to produce x-rays, wherein the energy transducer includes a Schottky cathode tip. More specifically, the energy transducer includes a transducer body, an anode provided at a first end of the transducer body, and a cathode provided at a second end of the transducer body opposite the anode. The energy transducer is coupled to an energy source by a flexible insertion device. The energy source provides electrical and/or light signals to the energy transducer via the flexible insertion device. Light transmitted from the energy source to the energy transducer by the flexible insertion device is focused on a Schottky cathode tip of the cathode by the optical fiber provided in the hollow core of the anode. The application of the light signal to the cathode tip results in heating of the tip and along with the electric field generated by the acceleration voltage it leads to electron Schottky emission and electron acceleration towards the anode. In another preferred embodiment, an electrical current, transmitted from the energy source to the energy transducer by the flexible insertion device, is applied to the Schottky cathode tip of the cathode, causing thermo-emission. The electrons generated due to this process are accelerated towards the anode across a voltage difference between the anode and the cathode.
    • 一种装置利用微型能量换能器提供原位辐射处理以产生X射线,其中能量换能器包括肖特基阴极尖端。 更具体地,能量换能器包括换能器主体,设置在换能器主体的第一端的阳极和设置在换能器本体的与阳极相对的第二端的阴极。 能量传感器通过柔性插入装置耦合到能量源。 能量源通过柔性插入装置向能量换能器提供电和/或光信号。 通过柔性插入装置从能量源传递到能量换能器的光通过设置在阳极中空芯中的光纤聚焦在阴极的肖特基阴极尖端上。 将光信号施加到阴极尖端导致尖端的加热以及由加速电压产生的电场,从而导致电子肖特基发射和朝向阳极的电子加速。 在另一个优选实施例中,通过柔性插入装置从能量源传递到能量换能器的电流被施加到阴极的肖特基阴极尖端,引起热发射。 由于该过程产生的电子在阳极和阴极之间的电压差上被朝向阳极加速。
    • 3. 发明授权
    • Dosimeter for a miniature energy transducer for emitting X-ray radiation
    • 用于发射X射线辐射的微型能量换能器的剂量计
    • US06320935B1
    • 2001-11-20
    • US09513959
    • 2000-02-28
    • Guy ShinarShmuel Bukshpan
    • Guy ShinarShmuel Bukshpan
    • A61N510
    • A61N5/1001A61N5/1002A61N5/1048G01T1/161G01T1/201
    • A dosimeter for an x-ray brachytherapy system permits in situ monitoring and control of radiation treatment via a miniaturized energy transducer within a human body. The dosimeter comprises a scintillating optical fiber having a distal end which is placed at the treatment site and a proximal end which is coupled to a dosimeter measurement unit. Utilizing energy supplied by an energy source, the miniaturized transducer generates x-ray photons. The scintillating optical fiber absorbs x-ray photons, converts the x-ray photons into light photons, and conveys the light photons to a dosimeter measurement unit. The light photons are converted into an electrical current which is representative of the intensity of the x-ray photons. The dosimeter measurement unit utilizes the electrical current to calculate and display the instantaneous and accumulated radiation dose, and radiation dose parameters are utilized to adjust energy levels, which are sent to the miniature energy transducer. Use of the miniaturized energy transducer in combination with the dosimeter eliminates most of the problems related to the methods based on the use of radioactive sources and offers a method for efficient, accurate, and controllable radiation treatment.
    • 用于X射线近距离放射治疗系统的剂量计允许通过人体内的小型化能量换能器原位监测和控制辐射治疗。 剂量计包括闪烁光纤,其具有放置在治疗部位的远端,以及耦合到剂量计测量单元的近端。 利用由能源提供的能量,小型化的换能器产生x射线光子。 闪烁光纤吸收x射线光子,将x射线光子转换为光子,并将光子传输到剂量计测量单元。 光子被转换为代表x射线光子强度的电流。 剂量计测量单元使用电流来计算和显示瞬时和累积的辐射剂量,并且使用辐射剂量参数来调节发送到微型能量换能器的能量水平。 将微型能量换能器与剂量计结合使用消除了与基于放射源使用的方法相关的大部分问题,并提供了一种有效,准确和可控的辐射治疗的方法。