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22 条记录 (耗时 0.022 秒)

    Imaging of ultrasonic fields with MRI
    2.
    发明授权
    Imaging of ultrasonic fields with MRI 失效
    MRI超声场成像

    公开(公告)号：US06246895B1

    公开(公告)日：2001-06-12

    申请号：US09216116

    申请日：1998-12-18

    申请人： Donald B. Plewes

    发明人： Donald B. Plewes

    IPC分类号： A61B5055

    CPC分类号： G01R33/56358 ,  A61B8/00 ,  A61B8/4416 ,  A61B8/485 ,  G01R33/28

    摘要： An MRI system is employed to produce an image of an ultrasonic wave propagating through tissue or the like. An imaging pulse sequence used to acquire the image data is performed in synchronism with the operation of an ultrasonic transducer, and reconstructed phase images measure the motion of excited spins. Physical parameters of the acoustic field such as acoustic pressure, acoustic intensity and wave number may be calculated and imaged. Non-linear propagation characteristics of the acoustic field are also measured and imaged.

    摘要翻译： 使用MRI系统来产生通过组织等传播的超声波的图像。 用于获取图像数据的成像脉冲序列与超声波换能器的操作同步地执行，并且重构的相位图像测量激励自旋的运动。 可以计算并成像声压，声强和波数等声场的物理参数。 还测量和成像声场的非线性传播特性。

    Scanning equalization radiography
    3.
    发明授权
    Scanning equalization radiography 失效
    扫描均衡摄影

    公开(公告)号：US4953192A

    公开(公告)日：1990-08-28

    申请号：US408765

    申请日：1989-09-18

    申请人： Donald B. Plewes

    发明人： Donald B. Plewes

    IPC分类号： A61B6/06 ,  G21K1/02 ,  G21K1/04 ,  H05G1/36 ,  H05G1/44 ,  H05G1/60

    CPC分类号： A61B6/542 ,  A61B6/06 ,  A61B6/4233 ,  G21K1/025 ,  G21K1/04 ,  G21K1/043 ,  H05G1/36 ,  H05G1/44 ,  H05G1/60

    摘要： A radiographic machine in which the exposure is equalized as between different areas of the image plane so as to enhance high spatial frequency features of the image and suppress low spatial frequency features and achieve other benefits as well. A fan beam which is wide enough to encompass the object being imaged is swept across the object and segments of that beam are individually pulse width modulated at each of a number of sampling intervals during the sweep by monostable or bistable shutter pins which either completely block or completely uncover the sectors which they control. An alternate embodiment adds beam width modulation as well, by making the shutter pins either completely block their sectors of uncover them only to the degree necessary for beam width modulation.

    摘要翻译： 其中曝光被平均在像平面的不同区域之间以便增强图像的高空间频率特征并抑制低空间频率特征并且实现其它益处的放射照相机。 宽度足以包围正在成像的物体的扇形光束被扫过物体，并且在扫描期间，通过单稳态或双稳态快门引脚在多个采样间隔的每一个处对该光束进行单独的脉冲宽度调制，其完全阻塞或 彻底揭露他们控制的部门。 另一个实施例也是通过使快门引脚完全阻挡它们的扇区以将其发现的波长宽度调制所必需的程度来增加波束宽度调制。

    SPECIALIZED TABLETOPS FOR MEDICAL IMAGING
    5.
    发明申请
    SPECIALIZED TABLETOPS FOR MEDICAL IMAGING 审中-公开
    用于医学成像的专用片剂

    公开(公告)号：US20110173753A1

    公开(公告)日：2011-07-21

    申请号：US13027870

    申请日：2011-02-15

    申请人： Christopher Alexander Luginbuhl ,  Cameron Anthony Piron ,  Donald B. Plewes

    发明人： Christopher Alexander Luginbuhl ,  Cameron Anthony Piron ,  Donald B. Plewes

    IPC分类号： A61G13/02

    CPC分类号： A61B6/04 ,  A61B5/0555 ,  A61B6/4417

    摘要： A system of interchangeable specialized tabletops for medical imaging, such as tomographic imaging, is constructed with features that permit improvements in patient imaging and treatment specific to a particular anatomy of interest. Such features include cutaways, holes and removable structures, ramps and integrated devices that allow access to tissues for intervention or imaging under multiple imaging modalities. Such features are also integrated, which aids in the positioning and immobilization of patient tissues and devices relative to those tissues. Structures and methods optimally use multiple tabletops with minimal space requirements, and of show medical imaging uses involving the storage of multiple tabletops.

    摘要翻译： 用于医学成像的可互换的专用台面系统（诸如层析成像）被构造成具有允许改善针对感兴趣的特定解剖结构的患者成像和治疗的特征。 这些特征包括切割，孔和可移除的结构，坡道和集成的装置，其允许在多个成像模式下进入组织进行干预或成像。 这些特征也是整合的，其有助于相对于那些组织定位和固定患者组织和装置。 结构和方法最佳地使用多个桌面，具有最小的空间要求，并显示涉及多个桌面存储的医学成像用途。

    Scanning equalization radiography
    8.
    发明授权
    Scanning equalization radiography 失效
    扫描均衡摄影

    公开(公告)号：US4972458A

    公开(公告)日：1990-11-20

    申请号：US242644

    申请日：1988-09-13

    申请人： Donald B. Plewes

    发明人： Donald B. Plewes

    IPC分类号： G03B42/02 ,  A61B6/00 ,  A61B6/06 ,  G06T1/00 ,  G21K1/02 ,  G21K1/04 ,  H04N5/32 ,  H04N7/18 ,  H05G1/30 ,  H05G1/36 ,  H05G1/44 ,  H05G1/60 ,  H05G1/64 ,  G21K5/10

    CPC分类号： G21K1/10 ,  A61B6/06 ,  A61B6/4233 ,  A61B6/542 ,  G21K1/025 ,  G21K1/04 ,  G21K1/043 ,  G21K1/046 ,  H05G1/36 ,  H05G1/44 ,  H05G1/60

    摘要： A radiographic machine in which the exposure is equalized as between different areas of the image plane so as to enhance high spatial frequency features of the image and suppress low spatial frequency features and achieve other benefits as well. A fan beam which is wide enough to encompass the object being imaged is swept across the object and segments of that beam are individually pulse width modulated at each of a number of sampling intervals during the sweep by monastable or bistable shutter pins which either completely block or completely uncover the sectors which they control. An alternate embodiment adds beam width moulation as well, by making the shutter pins either completely block their sectors of uncover them only to the degree necessary for beam width modulation.

    摘要翻译： 其中曝光被平均在像平面的不同区域之间以便增强图像的高空间频率特征并抑制低空间频率特征并且实现其它益处的放射照相机。 宽度足以包围正在成像的物体的扇形光束被扫过物体，并且在扫描过程中的多个采样间隔的每一个处，该光束的各个部分被单独地脉冲宽度调制，该可调节或双稳态快门引脚完全阻挡或 彻底揭露他们控制的部门。 另一个实施例也通过使快门引脚完全阻挡它们的扇区以将其发现到波束宽度调制所必需的程度来增加波束宽度布置。

    X-ray machine
    9.
    发明授权
    X-ray machine 失效
    X光机

    公开(公告)号：US4875226A

    公开(公告)日：1989-10-17

    申请号：US184210

    申请日：1988-04-21

    申请人： Donald B. Plewes

    发明人： Donald B. Plewes

    IPC分类号： G01N23/18 ,  G21K1/02

    CPC分类号： G21K1/02 ,  G01N23/18

    摘要： In a shadowgraphic x-ray machine the beam scans the image plane in raster fashion. A fore collimator system varies the beam cross-section during the scan to ensure that the beam footprint does not vary with position in the image plane.

    摘要翻译： 在阴影X光机中，光束以光栅方式扫描图像平面。 前置准直器系统在扫描期间改变光束横截面，以确保光束占地面积不随着像平面中的位置而变化。