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104 条记录 (耗时 0.016 秒)

    Ultrasonic transducer probe assembly
    86.
    发明公开
    Ultrasonic transducer probe assembly 失效
    超声波传感器探头组件

    公开(公告)号：EP0188341A3

    公开(公告)日：1987-05-27

    申请号：EP86300160

    申请日：1986-01-13

    申请人： TECHNICARE CORPORATION

    发明人： Meyers, Paul Fredric ,  Dow, Julian

    IPC分类号： G01N29/06

    CPC分类号： G01N29/26 ,  G01N29/2487 ,  G01N2291/0289

    摘要： A mechanical transducer probe assembly is provided which is both rugged and easy to assembly. The probe mechanism is located inside a hollow probe case. A reference point for assembly is located on the inner surface of the case. A motor assembly and a transducer mounting assembly are located within the case and are fixedly joined together. At the jointure of the two, the motor and transducer assemblies are in contact with the reference point, thereby positionally locating the transducer and its drive mechanism within the case. Means are provided for urging the motor and transducer assemblies against the references point, which means also provides shock mounting for the probe mechanism.

    Nuclear magnetic resonance imaging with reduced sensitivity to motional effects
    89.
    发明公开
    Nuclear magnetic resonance imaging with reduced sensitivity to motional effects 失效
    具有降低对运动影响的敏感性的核磁共振成像

    公开(公告)号：EP0142343A3

    公开(公告)日：1986-04-16

    申请号：EP84307746

    申请日：1984-11-09

    申请人： TECHNICARE CORPORATION

    发明人： Compton, Russell Allen

    IPC分类号： G01N24/08

    CPC分类号： G01R33/561 ,  G01R33/563

    摘要： The effects of motion in a given direction of particles being imaged in an NMR imaging system are substantially reduced by using gradients in the given direction produced by gradient pulse sequences which exhibit a zero value first moment relative to the point in time at which phase determination of the particles occurs. This point in time is generally taken at the time at which the longitudinal magnetization is translated to the transverse plane, as that is the phase reference for the NMR signals produced by the particles.

    High vacuum rotating anode x-ray tube
    90.
    发明公开
    High vacuum rotating anode x-ray tube 失效
    高真空旋转阳极X射线管

    公开(公告)号：EP0142249A3

    公开(公告)日：1986-02-05

    申请号：EP84306375

    申请日：1984-09-18

    申请人： TECHNICARE CORPORATION

    发明人： Carlson, Roland W. ,  Blaskis, Edward A.

    IPC分类号： H01J35/10 ,  H01J35/16

    CPC分类号： H01J35/106 ,  H01J35/16

    摘要： @ An all metal and ceramic high vacuum rotary anode x-ray tube adapted for mounting on a gantry of a rotational type CT scanner. The evacuated region where x-rays are generated is maintained at about 10 -7 Torr. Vacuum sealing about the rotating shaft of the anode is provided by a magnetic fluid. No bearings are utilized within the evacuated region. Large, long wearing ball bearings that transmit rotation through the vacuum seal are provided about the shaft outside of the high vacuum region where conventional lubricants may be applied. Circulating coolant is applied internally through the anode assuring continual operation of the tube without the need for frequent cool-down waits. A preferred embodiment discloses a modified path in the rotorforthe coolant designed to disturb the conventional laminar type of flow which is heat transfer inefficient to one characterized by high turbulence resulting in approximately an order of magnitude improvement in the coefficient of heat transfer.