Method for localizing a region in the human body, in particular venous
thrombi, by the uptake of a radioactive substance, particularly .sup.125 I
-
    1.
    发明授权
    Method for localizing a region in the human body, in particular venous thrombi, by the uptake of a radioactive substance, particularly .sup.125 I - 失效
    通过摄取放射性物质,特别是125I-纤维蛋白原来定位人体中的区域,特别是静脉血栓的方法

    公开(公告)号:US4453075A

    公开(公告)日:1984-06-05

    申请号:US481977

    申请日:1983-04-04

    摘要: An apparatus for determining the depth position of venous thrombi in the lower extremities utilizes a unique property in .sup.125 I. This resides in the fact that in approximately half of all disintegrations, two photons are emitted simultaneously. These two coincident photons have, like separately emitted photons, an energy of approximately 28 keV. A scintillation detector perceives the coincidently emitted photons as one photon of an energy of 56 keV. The quotient between the number of separately emitted photons and the number of coincident photons may thus be determined. This quotient constitutes a parameter which is greatly dependent on the distance between the detector and the source of radiation, whereby there is obtained a possibility of determining the depth of the thrombus.

    摘要翻译: 用于确定下肢静脉血栓的深度位置的装置利用125I中的独特性质。 这归因于在大约一半的崩解中,两个光子同时发射。 这两个重合的光子像独立发射的光子一样具有约28keV的能量。 闪烁探测器将同时发射的光子感知为56 keV能量的一个光子。 因此可以确定分开发射的光子的数量与重合的光子的数量之间的商。 该商构成了很大程度上取决于检测器与辐射源之间的距离的参数,从而获得了确定血栓深度的可能性。

    Method and apparatus for generating short ultrasonic echo pulses
    2.
    发明授权
    Method and apparatus for generating short ultrasonic echo pulses 失效
    用于产生短超声波回波脉冲的方法和装置

    公开(公告)号:US4520670A

    公开(公告)日:1985-06-04

    申请号:US527576

    申请日:1983-08-18

    CPC分类号: G01N29/30 G01S7/52046

    摘要: A method and an apparatus for generating short ultrasonic echo pulses by means of an ultrasonic transducer (2) utilizes a shift register (6) for storing a signal for excitation of said ultrasonic transducer. The stored signal is a weighted least squares filter signal to the transducer proper and is supplied to said transducer via a digital-to-analogue converter (7). Repeated adjustment of the stored signal can be effected by supplying, via an analogue-to-digital converter (11), the echo pulse signals from the ultrasonic transducer to a logic unit (12) for analysis.

    摘要翻译: PCT No.PCT / SE82 / 00431 Sec。 371日期:1983年8月18日 102(e)日期1983年8月18日PCT提交1982年12月20日PCT公布。 出版物WO83 / 02330 日期:1983年7月7日。一种用于通过超声换能器(2)产生短超声波回波脉冲的方法和装置利用移位寄存器(6)来存储用于激发所述超声换能器的信号。 存储的信号是到本传感器的加权最小二乘滤波器信号,并经由数模转换器(7)提供给所述换能器。 通过经由模数转换器(11)将来自超声换能器的回波脉冲信号提供给用于分析的逻辑单元(12),可以实现存储信号的重复调整。