Ultrasonic flow velocity imaging systems with velocity image presistence
    1.
    发明授权
    Ultrasonic flow velocity imaging systems with velocity image presistence 失效
    超声波流速成像系统与速度图像的存在

    公开(公告)号:US5215094A

    公开(公告)日:1993-06-01

    申请号:US799667

    申请日:1991-11-21

    IPC分类号: G01S15/89

    CPC分类号: G01S15/8909 A61B8/585

    摘要: An ultrasonic diagnostic imaging system is described which enhances the presentation of flow velocity images through asymmetric persistence of visually displayed changes in fluid velocity. Preferably the asymmetric persistence employs a shorter (i.e., faster) time constant for increases in fluid velocity and a longer (i.e., slower) time constant for decreases in fluid velocity. In a preferred embodiment of the present invention, increases in fluid velocity are displayed at their rate of occurrence, and decreases in fluid velocity are displayed with a longer, user-selectable time constant. In the preferred embodiment the persistence enhancement is determined as a function of displayed image frame rate so that the persistence time constant remains fixed as a function of time despite user changes affecting the frame rate.

    摘要翻译: 描述了一种超声诊断成像系统,其通过视觉显示的流体速度变化的不对称持久性来增强流速图像的呈现。 优选地,不对称持久性对于流体速度的增加使用更短的(即更快的)时间常数,并且对于流体速度的降低使用较长的(即较慢的)时间常数。 在本发明的优选实施例中,以其出现的速率显示流体速度的增加,并以较长的用户可选择的时间常数来显示流体速度的降低。 在优选实施例中,持久性增强被确定为显示的图像帧速率的函数,使得持续时间常数作为时间的函数保持固定,尽管用户改变影响帧速率。

    Ultrasonic image data formats
    2.
    发明授权
    Ultrasonic image data formats 失效
    超声波图像数据格式

    公开(公告)号:US5636631A

    公开(公告)日:1997-06-10

    申请号:US881911

    申请日:1992-05-12

    IPC分类号: H04N1/32 A61B8/00

    摘要: A format for ultrasonic image data storage is described that utilizes a standard data formatting system to provide information specific to ultrasonic images and, in particular, sequences of ultrasonic images. The format utilizes a technique of tagged data records with a unique tag that extends the standardized to ultrasonic image specific tages. On tag denotes a particular image in a sequence of images which is marked as the image which is representative of the sequence. Specific areas of an ultrasonic image which contain distinct types of data are tagged to identify the type of data in the area. The distinct types of data can be arranged in unique ranges of data values so that a particular data value will inherently identify the type of data to which the value relates. Blocks of image data comprising monochrome or color data can be tagged as to the data type, enabling luminance data or red, green and blue data to be alternatively represented in the data values and automatically processed accordingly. Another tag value identifies the preferred sequential direction in which a sequence of images is to be viewed when recalled and replayed.

    摘要翻译: 描述了用于超声图像数据存储的格式,其利用标准数据格式化系统来提供特定于超声波图像的信息,特别是超声波图像的序列。 该格式使用标记数据记录的技术,该技术具有将标准化到超声波图像特定时间范围的唯一标签。 On标签表示图像序列中的特定图像,其被标记为表示序列的图像。 标记包含不同类型数据的超声波图像的特定区域以识别该区域中的数据类型。 可以将不同类型的数据排列在唯一的数据值范围内,使得特定数据值将固有地识别该值所关联的数据的类型。 包括单色或彩色数据的图像数据块可以被标记为数据类型,使亮度数据或红色,绿色和蓝色数据可交替地表示在数据值中并被相应地进行处理。 另一个标签值标识在调用和重播时要查看图像序列的首选顺序方向。