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    • 1. 发明授权
    • Laser beam pulse formatting method
    • 激光束脉冲格式化方法
    • US5337333A
    • 1994-08-09
    • US973878
    • 1992-11-10
    • Thomas P. DalyEdward I. MosesRalph W. PattersonRichard H. Sawicki
    • Thomas P. DalyEdward I. MosesRalph W. PattersonRichard H. Sawicki
    • H01S3/00H01S3/083
    • H01S3/0057Y10S372/70
    • A method for formatting a laser beam pulse (20) using one or more delay loops (10). The delay loops (10) have a partially reflective beam splitter (12) and a plurality of highly reflective mirrors (14) arranged such that the laser beam pulse (20) enters into the delay loop (10) through the beam splitter (12) and circulates therein along a delay loop length (24) defined by the mirrors (14). As the laser beam pulse (20) circulates within the delay loop (10) a portion thereof is emitted upon each completed circuit when the laser beam pulse (20) strikes the beam splitter (12). The laser beam pulse (20) is thereby formatted into a plurality of sub-pulses (50, 52, 54 and 56). The delay loops (10) are used in combination to produce complex waveforms by combining the sub-pulses (50, 52, 54 and 56) using additive waveform synthesis.
    • 一种使用一个或多个延迟环(10)格式化激光束脉冲(20)的方法。 延迟环(10)具有部分反射的分束器(12)和多个高反射镜(14),其布置成使得激光束脉冲(20)通过分束器(12)进入延迟环(10) 并且沿着由反射镜(14)限定的延迟环长度(24)在其中循环。 当激光束脉冲(20)在延迟环(10)中循环时,当激光束脉冲(20)撞击分束器(12)时,其一部分在每个完成的电路上发射。 因此,激光束脉冲(20)被格式化成多个子脉冲(50,52,54和56)。 通过使用加法波形合成来组合子脉冲(50,52,54和56),延迟环路(10)被组合使用以产生复杂波形。
    • 2. 发明授权
    • System and method for radiation dose calculation within sub-volumes of a
monte carlo based particle transport grid
    • 基于蒙特卡罗基粒子运输网格子体积内辐射剂量计算的系统和方法
    • US6148272A
    • 2000-11-14
    • US238297
    • 1999-01-28
    • Paul M. BergstromThomas P. DalyEdward I. MosesRalph W. Patterson, Jr.Alexis E. Schach von WittenauDewey N. GarrettRonald K. HouseChristine L. Hartmann-SiantarLawrence J. CoxDonald H. Fujino
    • Paul M. BergstromThomas P. DalyEdward I. MosesRalph W. Patterson, Jr.Alexis E. Schach von WittenauDewey N. GarrettRonald K. HouseChristine L. Hartmann-SiantarLawrence J. CoxDonald H. Fujino
    • A61N5/10
    • A61N5/1031A61N2005/1034
    • A system and method is disclosed for radiation dose calculation within sub-volumes of a particle transport grid. In a first step of the method voxel volumes enclosing a first portion of the target mass are received. A second step in the method defines dosel volumes which enclose a second portion of the target mass and overlap the first portion. A third step in the method calculates common volumes between the dosel volumes and the voxel volumes. A fourth step in the method identifies locations in the target mass of energy deposits. And, a fifth step in the method calculates radiation doses received by the target mass within the dosel volumes. A common volume calculation module inputs voxel volumes enclosing a first portion of the target mass, inputs voxel mass densities corresponding to a density of the target mass within each of the voxel volumes, defines dosel volumes which enclose a second portion of the target mass and overlap the first portion, and calculates common volumes between the dosel volumes and the voxel volumes. A dosel mass module, multiplies the common volumes by corresponding voxel mass densities to obtain incremental dosel masses, and adds the incremental dosel masses corresponding to the dosel volumes to obtain dosel masses. A radiation transport module identifies locations in the target mass of energy deposits. And, a dose calculation module, coupled to the common volume calculation module and the radiation transport module, for calculating radiation doses received by the target mass within the dosel volumes.
    • 公开了用于在粒子运输网格的子体积内进行辐射剂量计算的系统和方法。 在方法的第一步中,接收包围目标质量块的第一部分的体素体积。 该方法中的第二步确定了封闭目标物质的第二部分并与第一部分重叠的剂量体积。 该方法中的第三步将计算dosel卷和体素卷之间的公共卷。 该方法中的第四步确定了目标能量存量的位置。 并且,该方法中的第五步骤计算在剂量体积内由目标质量接收的辐射剂量。 共同体积计算模块输入围绕目标质量的第一部分的体素体积,输入对应于每个体素体积内的目标质量密度的体素质量密度,定义包围靶质量的第二部分并重叠的剂量体积 第一部分,并计算dosel卷和体素卷之间的公共卷。 一个dosel质量模块,通过相应的体素质量密度乘以公共体积以获得增量剂量质量,并且增加与剂量体积对应的增量剂量组,以获得剂量质量。 辐射传输模块识别目标质量的能量沉积物中的位置。 而且,一个剂量计算模块耦合到公共体积计算模块和辐射传输模块,用于计算目标质量在剂量体积内接收的辐射剂量。