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公开(公告)号：US4068310A
公开(公告)日：1978-01-10
申请号：US707759
申请日：1976-07-22
申请人： Walter S. Friauf
发明人： Walter S. Friauf
摘要： A system providing a substantially gapless continuous line display of an analog signal as a function of time on a television monitor. The input is digitized and each level of quantization corresponds to one of the raster display lines to give proper vertical deflection. During each line of raster scan an oscillator and counter sequence the input address to a memory through a desired number of horizontal sampling positions, requiring an address of the order of 8 bits. Each address gives an output of several bits giving in digital form the instantaneous y coordinate of the signal. This is digitally compared with the digitized associated raster line number in a first digital comparator. This is also stored in a register strobed from the above-mentioned counter just before each change of address. The raster line number and the stored previous output are digitally compared in a second digital comparator. If the line number is less than the current trace deflection but greater than the previous deflection, a first AND gate provides an output signal at that instant. Similarly, if the line number is greater than the current trace deflection but less than the previous deflection, a second AND gate provides an output signal. If the current deflection is equal to the line count, this also provides a signal. An OR gate receives these signals, and any one of them will provide a trace-brightening signal at the output of the OR gate. The "equal output" signal is delayed by a time corresponding to 1/2 the horizontal sampling interval to improve the horizontal resolution.
摘要翻译： 一种在电视监视器上提供作为时间的函数的模拟信号的基本无缝连续线显示的系统。 输入被数字化，并且每个级别的量化对应于一个光栅显示线以给出适当的垂直偏转。 在光栅扫描的每一行期间，振荡器和计数器通过所需数量的水平采样位置将输入地址序列到存储器，需要8位数量级的地址。 每个地址给出数字形式的数字形式的信号的瞬时y坐标的输出。 这与第一个数字比较器中的数字化相关的栅格线数进行数字比较。 这也存储在每次更改地址之前从上述计数器选通的寄存器中。 光栅行号和存储的先前输出在第二个数字比较器中进行数字比较。 如果行号小于当前迹线偏转但大于先前偏转，则第一与门在该时刻提供输出信号。 类似地，如果线数大于当前迹线偏转但小于先前偏转，则第二与门提供输出信号。 如果电流偏转等于行数，这也提供了一个信号。 或门接收这些信号，其中任何一个将在或门的输出端提供跟踪增亮信号。 “等输出”信号被延迟一个对应于水平采样间隔1/2的时间，以改善水平分辨率。
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公开(公告)号：US4415807A
公开(公告)日：1983-11-15
申请号：US250840
申请日：1981-04-03
CPC分类号： G01T1/2985 , A61B6/037
摘要： A positron emission tomographic scanner is provided with cross-slice event data handling capability by adding only a coincidence detector and register in common to the circuitry for two adjacent planar detector arrays and adding an OR gate to the circuitry for each array. The improvement permits the same circuitry to be utilized for both cross-slice event processing and intra-slice event processing. Selection of the identification code for a detector is determined by a first coincidence detector in the case of an intra-slice event and the added coincidence detector in the case of an inter-slice event.
摘要翻译： 正电子发射断层扫描仪具有跨切片事件数据处理能力，通过仅将一致检测器和寄存器公共地注册到两个相邻的平面检测器阵列的电路中，并将或门加到每个阵列的电路上。 该改进允许将相同的电路用于跨切片事件处理和片内事件处理。 在片内事件的情况下由第一重合检测器确定检测器的识别码的选择，并且在片间事件的情况下由添加的重合检测器确定。
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公开(公告)号：US4395635A
公开(公告)日：1983-07-26
申请号：US228681
申请日：1981-01-26
CPC分类号： G01T1/2985 , A61B6/037
摘要： A gamma ray coincidence analysis system for a multichannel nuclear imaging device of the type employing scintillation detectors in ring-like arrays, with the detectors arranged in quadrants of the rings. The scintillation detectors in a ring have output circuits including respective timing discriminators and OR gates, and respective energy discriminators providing delayed energy pulses, and wherein timing pulses from the respective quadrants are fed via the OR gates to the inputs of a four-input coincidence detector without any delay except for a small delay internal to the discriminators and the very small delay of the OR gates. The delay of the energy pulses at the energy discriminators is for an energy validation period of 500 nsec. The output pulse from the coincidence detector is subsequently delayed for a similar period for verification of the energy levels of the two channels causing the coincidence. A data output signal is generated responsive to the concurrence of the delayed coincidence signal and the delayed energy verification pulses.
摘要翻译： 一种用于使用环状阵列中的闪烁检测器的多通道核成像装置的伽马射线符合分析系统，其中检测器布置在环的象限中。 环中的闪烁检测器具有包括各自的定时鉴别器和或门的输出电路，以及提供延迟的能量脉冲的各自的能量鉴别器，并且其中来自相应象限的定时脉冲经由或门馈送到四输入重合检测器 没有任何延迟，除了鉴别器内部的小延迟和OR门的非常小的延迟。 在能量鉴别器处的能量脉冲的延迟是在500nsec的能量验证周期。 随后将来自重合检测器的输出脉冲延迟相同的周期，以验证两个通道的能量水平导致重合。 响应于延迟符合信号和延迟能量验证脉冲的同时产生数据输出信号。
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