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11. 发明授权

US4680709A Back projection image reconstruction apparatus and method 失效
标题翻译：背投影图像重建装置及方法
公开(公告)号：US4680709A
公开(公告)日：1987-07-14
申请号：US670595
申请日：1984-11-13
申请人： Nallaswamy Srinivasan , Sharon L. Banaszewski , Kishore C. Acharya
发明人： Nallaswamy Srinivasan , Sharon L. Banaszewski , Kishore C. Acharya
IPC分类号： G01N23/04 , A61B6/03 , G03B42/02 , G06T1/00 , G06T11/00 , G06F15/42 , G06G7/60
CPC分类号： G06T11/005
摘要： Image reconstruction time in a CT scanner is enhanced by using a pipeline structure and interpolation techniques to identify each detector for use in back projection of radiation aborption measurements through each pixel in each view of the scanner. In a preferred embodiment, detectors are identified by calculation for a pixel in every third view with detectors for intermediate views obtained by interpolation of the calculated detectors. Similarly, detectors are identified for every other pixel in a view with the detector for the intermediate pixel identified by interpolation.
摘要翻译：通过使用流水线结构和内插技术来增强CT扫描仪中的图像重建时间，以识别每个检测器用于通过扫描仪每个视图中的每个像素进行辐射吸收测量的反投影。在优选实施例中，通过对每个第三视图中的像素的计算来识别检测器，其中通过对所计算的检测器进行插值而获得的用于中间视图的检测器。类似地，对于通过内插识别的中间像素的检测器，在视图中为每个其他像素识别检测器。

12. 发明授权

US4504909A Method of using an array processor for real time processing 失效
标题翻译：使用阵列处理器进行实时处理的方法
公开(公告)号：US4504909A
公开(公告)日：1985-03-12
申请号：US428458
申请日：1982-09-30
申请人： Kishore C. Acharya , Thomas J. Gilbert , Terry R. Griffie
发明人： Kishore C. Acharya , Thomas J. Gilbert , Terry R. Griffie
IPC分类号： G06T11/00 , G01T1/29 , G06F15/52
CPC分类号： G06T11/005 , G06T2211/428 , Y10S378/901
摘要： A procedure for use with a data acquisition system and an array processor for real time processing of the acquired data. Rather than utilize the array processor in its normal mode to process one array before moving on to the next, processing of subportions of a given array is interleaved with inputting of acquired data sets for the next array. The size of the subgroup, the number of data sets in the array, the number of channels to be processed, the nature of the process to be performed and the speed at which it can be performed are balanced in such a way that (a) processing of a subgroup is completed at about the time the next set is ready for input, and (b) at the completion of processing of the last subgroup within a given array, the last set of the next array is ready for input, so that processing of the next array commences immediately.
摘要翻译：与数据采集系统和阵列处理器一起使用以便对所获取的数据进行实时处理的程序。不是在其正常模式下利用阵列处理器在移动到下一个阵列之前处理一个阵列，而是对于给定阵列的子部分的处理与下一个阵列的所获取的数据集的输入进行交织。子组的大小，阵列中的数据集的数量，待处理的信道的数量，要执行的进程的性质以及可以执行的速度的平衡如下：（a）子组的处理在下一个集合准备好输入的时间完成，（b）在给定数组内的最后一个子组的处理完成时，下一个数组的最后一组准备好输入，以便下一个阵列的处理立即开始。

13. 发明授权

US5177697A Autozeroing apparatus and method for a computerized tomography data acquisition system 失效
标题翻译：计算机图形数据采集系统的自动化设备和方法
公开(公告)号：US5177697A
公开(公告)日：1993-01-05
申请号：US576340
申请日：1990-08-31
申请人： Paul C. Schanen , Robert H. Pedersen , Kishore C. Acharya
发明人： Paul C. Schanen , Robert H. Pedersen , Kishore C. Acharya
IPC分类号： H03M1/10 , H03M1/12 , H03M1/18
CPC分类号： H03M1/1019 , H03M1/129 , H03M1/183 , H03M1/186
摘要： An autozeroing apparatus is disclosed for correcting the offset error in a computerized axial tomography (CAT) scanner data acquisition subsystem (DAS). The DAS includes a floating point amplifier for applying discrete amplification factors, or gain range segments, to an analog input before conversion to digital in an A/D converter. A digital autozero circuit is connected to the output of the A/D converter and adds a digital offset value to each A/D converter sample during data acquisition to correct for the net offset errors throughout the DAS. Separate storage latches are included for storing offset values corresponding to each gain range segment, and the offset value used for each sample correction corresponds to the gain range segment used for that sample. During an autozero reference interval, a reference voltage is applied to the DAS and the offset values are updated so as to force the corrected A/D converter output to agree with the reference voltage.
摘要翻译：公开了一种用于校正计算机化轴向断层摄影（CAT）扫描仪数据采集子系统（DAS）中的偏移误差的自动调零装置。 DAS包括一个浮点放大器，用于在A / D转换器中转换为数字之前将模拟输入端应用离散放大系数或增益范围段。数字自动调零电路连接到A / D转换器的输出，并在数据采集期间向每个A / D转换器样本添加数字偏移值，以纠正整个DAS中的净偏移误差。包括单独的存储锁存器用于存储对应于每个增益范围段的偏移值，并且用于每个采样校正的偏移值对应于用于该采样的增益范围段。在自动调零参考间隔期间，将参考电压施加到DAS，并且更新偏移值，以便强制校正的A / D转换器输出与参考电压一致。

14. 发明授权

US5103823A Motion correction in cardiology inspection systems 失效
标题翻译：心理检查系统运动校正
公开(公告)号：US5103823A
公开(公告)日：1992-04-14
申请号：US409249
申请日：1989-09-19
申请人： Kishore C. Acharya , Raymond P. Grenier
发明人： Kishore C. Acharya , Raymond P. Grenier
IPC分类号： G01T1/161 , A61B6/00 , A61B10/00 , G01T1/164 , G01T1/29
CPC分类号： A61B6/541 , A61B6/4057 , A61B6/4258 , A61B6/482 , G01T1/1648 , A61B6/503 , A61B6/504
摘要： A method and apparatus for motion correction of image information collected by a cardiology inspection system. The cardiology inspection system collects image information from an exercising patient. The system corrects for the patient motion to provide dynamic time segmented images of radioactive dye flow through the patient's cardiac system, removing anomalous displacements from the images and allowing unambiguous evaluation of heart functionality while under physical stress.

15. 发明授权

US4606004A Apparatus for reduction of filtration truncation errors 失效
标题翻译：用于减少过滤截断误差的装置
公开(公告)号：US4606004A
公开(公告)日：1986-08-12
申请号：US591730
申请日：1984-03-21
申请人： Carl R. Crawford , Kishore C. Acharya
发明人： Carl R. Crawford , Kishore C. Acharya
IPC分类号： G06F17/10 , G06F17/14 , G06T1/20 , G06T11/00 , G06F15/42
CPC分类号： G06T11/005 , A61B6/5258 , Y10S378/901
摘要： Apparatus for reduction of filtration truncation errors caused by convolving a plurality of input signals, such as line-integral projection data obtained in a computerized tomography (CT) scan of an object, with a common kernel function in a finite precision machine using Fourier transform techniques. The resulting convolved output signals contain correlated noise which, in the case of reconstructed CT images, manifests itself as structured noise in the form of rings and center spots in the image. The correlated noise can be reduced by randomly shifting the data prior to convolving it. The random shift can be achieved by a rotational permutation scheme. Another scheme for shifting the data is to prepend or append zeros to the data by using a random number generator or a deterministic function.
摘要翻译：用于减少由使用傅里叶变换技术的有限精密机器中的公共核心功能卷积多个输入信号（例如在对象的计算机断层摄影（CT）扫描中获得的线积分投影数据）引起的过滤截断错误的装置。所产生的卷积输出信号包含相关噪声，其在重建的CT图像的情况下，以图像中环和中心点的形式表现为结构化噪声。相关噪声可以通过在卷积之前随机移位数据来减少。随机移位可以通过旋转置换方案来实现。用于移动数据的另一种方案是通过使用随机数生成器或确定性函数来将零添加到数据中。

16. 发明授权

US06195408B1 Methods and apparatus for cable interconnection verification 有权
标题翻译：电缆互连验证方法和装置
公开(公告)号：US06195408B1
公开(公告)日：2001-02-27
申请号：US09216473
申请日：1998-12-18
申请人： Kishore C. Acharya , James A. Blake
发明人： Kishore C. Acharya , James A. Blake
IPC分类号： A61B600
CPC分类号： A61B6/541 , G01R31/041
摘要： The present invention, in one form, is an imaging system which includes a verification system for verifying the proper connection of an interconnection cable. In accordance with one embodiment of the verification system, a verification circuit verifies operation of the interconnection cable by altering the patterns supplied from an EKG subsystem. More specifically, the conduction of interconnection cable is verified prior to, during and after scanning the patient by transmitting patterns received from the EKG subsystem through the verification circuit back to the EKG subsystem. If the patterns match the expected patterns, a verification signal is generated indicating proper cable connection.
摘要翻译：本发明以一种形式是一种成像系统，其包括用于验证互连电缆的正确连接的验证系统。根据验证系统的一个实施例，验证电路通过改变从EKG子系统提供的模式来验证互连电缆的操作。更具体地说，在扫描患者之前，期间和之后，通过将从EKG子系统接收到的模式通过验证电路发送回EKG子系统来验证互连电缆的导通。如果模式与期望的模式匹配，则生成指示正确的电缆连接的验证信号。

17. 发明授权

US5056006A Parallel processor with single program storage and sequencer and simultaneous instruction processing 失效
标题翻译：具有单程序存储和定序器并行指令处理的并行处理器
公开(公告)号：US5056006A
公开(公告)日：1991-10-08
申请号：US551682
申请日：1990-07-09
申请人： Kishore C. Acharya , Paul C. Schanen
发明人： Kishore C. Acharya , Paul C. Schanen
IPC分类号： G06F15/80
CPC分类号： G06F15/8015
摘要： A processor for use in CAT X-ray systems and NMR systems performs floating point arithmetic operations in parallel to shorten processing time. A single program memory and program sequencing unit operates a set of floating point arithmetic units to carry out parallel operations on data set storeed in respective data memories. An integer processor unit executes logical operations and a shared data memory stores constants and other data which is required by the integer processor unit and which is common to the operations performed by all of the floating point arithmetic units.
摘要翻译：用于CAT X射线系统和NMR系统的处理器并行执行浮点运算以缩短处理时间。单个程序存储器和程序排序单元操作一组浮点运算单元，以对存储在相应数据存储器中的数据集执行并行操作。整数处理器单元执行逻辑操作，共享数据存储器存储整数处理器单元所需的常数和其他数据，并且由所有浮点运算单元执行的操作是共同的。

18. 发明授权

US4815118A Data converter for CT data acquisition system 失效
标题翻译：数据转换器用于CT数据采集系统
公开(公告)号：US4815118A
公开(公告)日：1989-03-21
申请号：US66987
申请日：1987-06-29
申请人： Kishore C. Acharya , Paul C. Schanen
发明人： Kishore C. Acharya , Paul C. Schanen
IPC分类号： A61B6/03 , H03G3/00 , H03G3/20 , H03M1/18 , A61B6/00
CPC分类号： H03G3/3052 , H03G3/00
摘要： Improved data converter circuitry for a CT data acquisition system is disclosed which makes use of a programmable gain amplifier whose gain is set according to the magnitude of a detector input signal by selecting one of several resistor voltage-divider paths at the input of a fixed gain amplifier. An auto-zero loop uses an intergrating op-amp to provide periodic correction to offset voltage of the fixed gain amplifier. In a modified embodiment, an auto-zero loop is provided for correction of both the fixed gain amplifier and a serially-connected A/D converter.

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