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    • 58. 发明授权
    • Logarithmic arithmetic unit avoiding division as far as predetermined arithmetic precision is guaranteed
    • 对数算术单元避免划分为预定的算术精度
    • US06711601B2
    • 2004-03-23
    • US09775513
    • 2001-02-05
    • Yoshitsugu InoueHiroyuki KawaiJunko KobaraRobert Streitenberger
    • Yoshitsugu InoueHiroyuki KawaiJunko KobaraRobert Streitenberger
    • G06F7556
    • G06F1/0307G06F1/035
    • A logarithmic arithmetic unit includes first logarithmic operation part multiplying an exponent part of floating-point data by a prescribed value, a logarithmic table memory outputting a logarithmic value corresponding to bit data expressing a digit higher than a prescribed digit of a fixed-point part of the floating-point data, divisional precision decision part deciding divisional precision on the basis of the exponent part, division part performing division on a dividend obtained by subtracting the bit data from the fixed-point part and a divisor of the bit data and obtaining a result of division of a number of digits set on the basis of the divisional precision, second logarithmic operation part obtaining the logarithmic value of a value obtained by dividing the fixed-point part by the bit data and sum operation part adding outputs from the first and second logarithmic operation parts and the logarithmic table memory to each other.
    • 对数算术单元包括将浮点数据的指数部分乘以规定值的第一对数运算部,对数表存储器输出对应于与比特数据对应的对数值,比特数据表示高于定点部分的规定数位 所述浮点数据,分割精度判定部根据所述指数部判定分割精度,对所述定点部分减去所述位数据和所述位数据的除数进行除法而得到的除数, 基于分割精度设定的数位分割结果,第二对数运算部分求出通过将定点部分除以比特数据而获得的值的对数值和加法运算部分的加法运算部分,从第一和第 第二对数运算部分和对数表存储器。
    • 59. 发明授权
    • X-ray examination apparatus and imaging method of X-ray image
    • X射线检查装置和X射线图像的成像方法
    • US06381299B1
    • 2002-04-30
    • US09555904
    • 2000-06-05
    • Rika BabaKen UedaHiroyuki KawaiHironori UekiKoichi KoikeAkira KubaNobuhisa Kasagima
    • Rika BabaKen UedaHiroyuki KawaiHironori UekiKoichi KoikeAkira KubaNobuhisa Kasagima
    • G01N2300
    • A61B6/0457A61B6/032
    • Between an X-ray generating system and an X-ray image detecting system arranged opposite to the X-ray generating system, an examination object supporting system is arranged and contains a straight movement table provided on a rotary table supported by a rotary table supporting member, and an examination object supporting member for supporting the examination object under either a standing position or a sitting position on the straight movement table. While the examination object is rotated by the rotary table, the examination object is continuously moved (reciprocating movement) by the straight movement table along a direction parallel to the rotation plane, and X-ray images of the examination object are acquired along a plurality of directions during both the rotating operation and the moving operation. As a result, both an X-ray tomographic image and a three-dimensional image (stereoscopic image) of a wider area than a viewing field of an X-ray I.I. can be acquired. Since the viewing fields of the X-ray tomographic image and of the 3-dimensional image can be employed, both diagnostic performance and also a diagnostic efficiency with respect to a large organ such as a lung can be improved.
    • 在与X射线产生系统相对设置的X射线产生系统和X射线图像检测系统之间,配置有检查对象支撑系统,并且包括设置在由旋转台支撑构件支撑的旋转台上的直动移动台 以及检查对象支撑构件,用于在直立移动台上的站立位置或坐姿下支撑检查对象。 当检查对象被旋转台旋转时,检查对象通过直线移动台沿着与旋转平面平行的方向连续移动(往复运动),并且检查对象的X射线图像沿着多个 在旋转操作和移动操作期间的方向。 结果,X射线断层图像和比X射线I.I的视场更宽区域的三维图像(立体图像)都是。 可以获得。 由于可以使用X射线断层图像和3D图像的视野,因此可以提高诊断性能以及相对于诸如肺的大器官的诊断效率。