-
公开(公告)号：US4562900A
公开(公告)日：1986-01-07
申请号：US684232
申请日：1984-12-20
CPC分类号： G10K11/30
摘要： A lens system for directing and focussing acoustic energy from an array of acoustic transducers on a small target can be made lightweight, low in absorption and dispersion by incorporating plastic Fresnel lenses with prisms into a monolithic tray of the same plastic with one lens for each transducer.
摘要翻译： 用于引导和聚焦来自小目标上的声换能器阵列的声能的透镜系统可以通过将具有棱镜的塑料菲涅尔透镜结合到同一塑料的整体式托盘中，使每个换能器具有一个透镜，从而使其重量轻，吸收和散射低 。
-
公开(公告)号：US06320382B1
公开(公告)日：2001-11-20
申请号：US09471640
申请日：1999-12-23
申请人： Weston A. Anderson
发明人： Weston A. Anderson
IPC分类号： G01V300
CPC分类号： G01R33/385 , G01R33/34007 , G01R33/34092
摘要： A z-axis magnetic field gradient coil for nuclear magnetic resonance (NMR) spectrometry includes an etched double-sided flexible sheet having via connections running through the sheet. The vias interconnect two conductive patterns formed on opposite sides of the sheet. Each z-axis current lead is adjacent to another z-axis current lead oriented in the opposite direction, such that the z-axis current components of the two patterns cancel each other. The resulting net current component is in the x-y plane, and generates the desired z-axis magnetic field gradient.
摘要翻译： 用于核磁共振（NMR）光谱法的z轴磁场梯度线圈包括具有穿过片材的通孔连接的蚀刻的双面柔性片。 通孔将形成在片材的相对侧上的两个导电图案互连。 每个z轴电流引线与另一个在相反方向上定向的z轴电流引线相邻，使得两个图案的z轴电流分量相互抵消。 所得到的净电流分量在x-y平面中，并产生所需的z轴磁场梯度。
-
公开(公告)号：US5768337A
公开(公告)日：1998-06-16
申请号：US688468
申请日：1996-07-30
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： H01J35/24 , H01J35/065 , H01J2201/342 , H01J2235/1266 , H01J2235/162
摘要： An X-ray tube has an anode and a photocathode inside a vacuum envelope and an electron multiplier is disposed between them. Such an electron multiplier may be a plurality of sequentially disposed dynodes or a microchannel plate. Because of the secondary electron emission from such an electron multiplier, a higher-power radiation is obtained without requiring a high optical power level to generate photoelectrons. The vacuum envelope may be of a rotary type with the anode and photocathode having annular regions.
摘要翻译： X射线管在真空外壳内具有阳极和光电阴极，并且在它们之间设置电子倍增器。 这种电子倍增器可以是多个顺序设置的倍增电极或微通道板。 由于来自这种电子倍增器的二次电子发射，获得更高功率的辐射而不需要高的光功率电平来产生光电子。 真空外壳可以是具有阳极和光电阴极具有环形区域的旋转型。
-
公开(公告)号：US3938526A
公开(公告)日：1976-02-17
申请号：US471649
申请日：1974-05-20
CPC分类号： A61H39/06 , A61H39/08 , Y10S128/907
摘要： A method and apparatus for electrically heating an acupuncture needle that has been inserted into a subject is disclosed. An applicator unit contains an electrical heating element thermally coupled to an acupuncture needle and directly to the skin adjacent to the acupuncture needle. Regulation and control of the heat supplied by the applicator unit is achieved through the control of electrical power supplied to the heating element. Either temperature or power control can be selected, and temperature indication is provided. In use, after the acupuncture needle has been inserted through the subject's skin, the applicator unit is attached to the acupuncture needle and regulated electrical power is applied to produce controlled heat.
摘要翻译： 公开了一种用于电加热已经插入到受试者中的针灸针的方法和装置。 施加器单元包含热耦合到针刺针并且直接连接到针灸针附近的皮肤的电加热元件。 通过控制提供给加热元件的电力来实现由施加器单元提供的热量的调节和控制。 可以选择温度或功率控制，并提供温度指示。 在使用中，针刺针穿过被检者的皮肤后，将涂抹器单元安装到针灸针上，并施加调节电力以产生受控热量。
-
公开(公告)号：US06411092B1
公开(公告)日：2002-06-25
申请号：US09676636
申请日：2000-09-30
申请人： Weston A. Anderson
发明人： Weston A. Anderson
IPC分类号： G01V300
CPC分类号： G01R33/34069 , G01R33/34007 , G01R33/34023 , G01R33/34092
摘要： Low-temperature (cryogenic) radio-frequency (RF) coils for nuclear magnetic resonance (NMR) applications include composite multi-layered structures including an internal normal metal layer clad on both sides by external high-purity annealed aluminum layers. The magnetic susceptibilities of the internal and external layers are opposite in sign, and the thicknesses of the layers are chosen such that the composite structure has a net magnetic susceptibility equal to that of its surroundings (vacuum or support material). The internal layer can have a higher resistivity and magnetoresistance than the external layers. The use of high-purity, annealed aluminum for the external layers allows relatively high Q-factors for the cryogenic coils.
摘要翻译： 用于核磁共振（NMR）应用的低温（低温）射频（RF）线圈包括复合多层结构，包括通过外部高纯度退火铝层包覆在两侧的内部正常金属层。 内部和外部层的磁化率符号相反，并且层的厚度被选择为使得复合结构具有等于其周围的净磁化率（真空或支撑材料）。 内层可以具有比外层更高的电阻率和磁阻。 对于外层，使用高纯度，退火的铝允许用于低温线圈的相对较高的Q因子。
-
6.发明授权
公开(公告)号：US4413630A
公开(公告)日：1983-11-08
申请号：US239251
申请日：1981-03-02
IPC分类号： A61B5/0456 , A61B8/08 , G01S7/52 , A61B10/00
CPC分类号： A61B5/0456 , A61B8/08 , G01S7/52063
摘要： Improvements are disclosed in an ultrasonic display and recording system of the type utilized in diagnostic medicine with particular applicability in cardiovascular diagnosis. The system includes a multi-element transducer for generating and receiving ultrasonic energy which is propagated into and reflected back from the cardiovascular region of the patient being examined, and also includes means for generating a two-dimensional real time display and/or image of the zone of examination. TM recording means are associated with the system and may be actuated to effect a TM recording corresponding to a preselected region of the real time image being observed. An ECG output signal is also displayed in real time with the two-dimensional image, and photographs of the displays may be produced at selected points in the ECG cycle in accordance with a setting made by the system operator. The system includes provision for generating video recordings; and means for imposing various identification and time data upon the displays.
摘要翻译： 在诊断医学中使用的类型的超声波显示和记录系统中公开了改进，其特别适用于心血管诊断。 该系统包括用于产生和接收超声能量的多元件换能器，该超声波能量被传播到正在检查的患者的心血管区域并从其被反射回来，并且还包括用于产生二维实时显示和/或 考试区。 TM记录装置与系统相关联并且可以被致动以实现对应于所观察到的实时图像的预选区域的TM记录。 ECG输出信号也与二维图像实时显示，并且可以根据系统操作者所做的设置在ECG周期的选定点产生显示照片。 该系统包括用于生成视频录像的规定; 以及用于在显示器上施加各种识别和时间数据的装置。
-
公开(公告)号：US4290310A
公开(公告)日：1981-09-22
申请号：US55721
申请日：1979-07-09
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： G10K11/345 , G01S15/8918 , G01S7/52028
摘要： A real-time ultrasonic imaging system is disclosed which includes an array of transducers adapted for propagating ultrasonic energy into a body to be ultrasonically examined and for receiving reradiated energy from points within the body. A plurality of signal channels each includes a transmitter branch and a receiver branch associated with respective transmit and receive transducers, or both branches may share a single transducer. A transmitter branch activates a transducer to propagate the sonic energy and a receiver branch receives from the transducer electrical signals corresponding to the reradiated energy. Memory means in each receiver branch receive and store data indicative of the signal level passed to the channel by its associated transducer. Display means are provided for receiving the data from the memory means in each of the channels and for combining and processing such data to effect a real-time display of the bodily portion being examined. Timing generator means in each of channels, connected to the transmitter and memory means associated with that channel, activate the respective transducers at predetermined times to phase the transducers to enable steering and focusing of the array. The timing generator means also function to gate data into the memory and at a later time to gate out the data from the memory (at predetermined intervals), thereby controlling the bodily points from which the reradiated sonic energy is received and to enable steering and focusing of the transducer array during the receiving operation of such array. Control logic means are connected to the timing generator means for enabling the former to provide signals to the memory means and transmitters in each of the said channels.
摘要翻译： 公开了一种实时超声成像系统，其包括适于将超声波能量传播到身体中以进行超声波检查并用于从身体内的点接收再辐射的能量的换能器阵列。 多个信号通道各自包括与相应的发射和接收换能器相关联的发射机分支和接收机分支，或者两个分支可以共享单个换能器。 发射机分支激活换能器以传播声能，并且接收器分支从换能器接收对应于再辐射能量的电信号。 每个接收器分支中的存储器装置接收并存储指示通过其相关联的传感器传送到信道的信号电平的数据。 提供了显示装置，用于在每个通道中从存储装置接收数据，并且用于组合和处理这些数据以实现被检查的身体部分的实时显示。 定时发生器装置在连接到与该通道相关联的发射器和存储器装置的每个通道中，在预定时间激活相应的换能器以使换能器相位，以实现阵列的转向和聚焦。 定时发生器装置还用于将数据门控到存储器中，并且稍后将其从存储器中以预定间隔对数据进行栅极输出，从而控制从其接收再发射的声波能量的身体点，并实现转向和聚焦 在这种阵列的接收操作期间的换能器阵列。 控制逻辑装置连接到定时发生器装置，以使得前者能够向每个所述通道中的存储装置和发射器提供信号。
-
公开(公告)号：US5767677A
公开(公告)日：1998-06-16
申请号：US694886
申请日：1996-08-09
申请人： Weston A. Anderson
发明人： Weston A. Anderson
CPC分类号： G01R33/3628 , G01R33/34092
摘要： Radiation damping effects in NMR are compensated by splitting the amplified NMR signal induced in the main probe coil to obtain a correction signal, phase shifting the correction signal to obtain a feedback signal and impressing the feedback signal onto the sample through means independent of the main probe coil.
摘要翻译： 通过分离在主探针线圈中感应的放大NMR信号来补偿NMR中的辐射阻尼效应，以获得校正信号，将校正信号相移以获得反馈信号，并通过独立于主探针的装置将反馈信号施加到样品上 线圈
-
9.发明授权
公开(公告)号：US5541975A
公开(公告)日：1996-07-30
申请号：US179023
申请日：1994-01-07
CPC分类号： H01J35/106 , H05G1/025 , H05G1/04 , H01J2235/1204 , H01J2235/1279
摘要： An X-ray tube rotating anode is cooled with a liquid metal functioning as a recirculated heat exchange fluid and/or a metal film in a gap between the anode and a stationary structure. The liquid metal is confined to the gap by (a) a labyrinth having a coating that is not wetted by the liquid, (b) a magnetic structure, or (c) a wick. The liquid metal recirculated through the anode is cooled in a heat exchanger located either outside the tube or in the tube so it is surrounded by the anode. The heat exchanger in the tube includes a mass of metal in thermal contact with the recirculating liquid metal and including numerous passages for a cooling fluid, e.g. water. A high thermal conductivity path is provided between an anode region bombarded by electrons and a central region of the tube where heat is extracted. In one embodiment the high thermal conductivity is achieved by stacked pyrolytic structures having crystalline axes arranged so there is high heat conductivity radially of the region and lower thermal heat conductivity normal to the high heat conductivity direction.
摘要翻译： X射线管旋转阳极用在作为再循环热交换流体和/或金属膜之间的液体金属在阳极和固定结构之间的间隙中冷却。 液体金属通过（a）具有不被液体润湿的涂层的迷宫式，（b）磁性结构或（c）芯）限制在间隙。 通过阳极再循环的液态金属在位于管外部或管内的热交换器中冷却，使其被阳极包围。 管中的热交换器包括与再循环液体金属热接触的金属块，并且包括用于冷却流体的许多通道，例如， 水。 在由电子轰击的阳极区域和提取热量的管的中心区域之间提供高导热性路径。 在一个实施方案中，通过堆叠的热解结构实现了高热导率，其具有排列的晶轴，因此在该区域内径向具有高导热性，并且较低的热传导率垂直于高导热方向。
-
公开(公告)号：US4990856A
公开(公告)日：1991-02-05
申请号：US418789
申请日：1989-10-03
摘要： A small sample of material is introduced into a vacuum to be analyzed, by ionization of atoms or molecular fragments of the sample using an electron or photon beam. The ionized species are trapped in a structure that defines electric fields or a combination of electric and magnetic fields in such a way that their motions are confined to the interior of the trap and that their motions within the trap are characterized by unique and discrete frequencies of oscillation dependent on the mass-to-charge ratio of the individual species. In order to provide for the detection of the frequencies of the motions, additional electrical signals are applied to the trapping structure so as to cause the motions to take place with a considerable degree of coherence. Alternatively, the coherence may be caused by creation of the ions during a very short pulse of the electron or photon beam at a position within the trapping structure but displaced from a positon of equilibrium. An electrical response to the individual motions of the ions, taking place at discrete frequencies related to their mass-to-charge ratios, frequency analyzed to determine the mass-to-charge ratios of the ions contribute to that electrical response, thereby indicating the types of ions present and their respective quantities.
摘要翻译： 通过使用电子或光子束使样品的原子或分子片段离子化，将一小部分材料样品引入待分析的真空中。 电离物质被捕获在限定电场或电场和磁场的组合的结构中，使得它们的运动被限制在陷阱的内部，并且它们在陷阱内的运动由独特和离散的频率 振荡取决于个体物质的质荷比。 为了提供对运动的频率的检测，附加的电信号被施加到捕获结构，以便使运动以相当程度的一致性发生。 或者，可以通过在捕获结构内的位置处的电子或光子束的非常短的脉冲内产生离子而产生相干性，但是从平衡位置移位。 分析发生在与其质荷比相关的离散频率处的离子的单独运动的电响应，以分析频率以确定离子的质荷比来促成该电响应，从而指示类型 的离子存在和它们各自的量。
-
-
-
-
-
-
-
-
-
搜索结果
31 条记录 (耗时 0.025 秒)