-
公开(公告)号：US5684243A
公开(公告)日：1997-11-04
申请号：US712015
申请日：1996-09-11
CPC分类号： G01S7/52023 , B06B1/0207 , G01H3/005 , G01S7/52019 , G01S7/5205 , B06B2201/20 , H04R17/08
摘要： Apparatus and methods for controlling electrostrictive transducer sensitivity in a pulse-echo medical ultrasound system. Certain characteristics of each transducer element are tested after manufacture and recorded on a storage medium. The stored data is then used, along with certain model relations, for monitoring certain operational parameters of the transducer during use, and feedback compensation applied for maintaining the transducer sensitivity substantially constant. The parameters to be monitored may include the temperature, acoustic pressure, input power, and a figure of merit determined from the dielectric constant and coupling coefficient.
摘要翻译： 用于在脉冲回波医疗超声系统中控制电致伸缩传感器灵敏度的装置和方法。 每个换能器元件的某些特性在制造后测试并记录在存储介质上。 然后，存储的数据连同某些模型关系一起用于在使用期间监测换能器的某些操作参数，以及用于维持换能器灵敏度基本恒定的反馈补偿。 待监测的参数可以包括从介电常数和耦合系数确定的温度，声压，输入功率和品质因数。
-
公开(公告)号：US5533510A
公开(公告)日：1996-07-09
申请号：US532264
申请日：1995-09-22
CPC分类号： G01S7/52073 , A61B8/0883 , G01N29/0609 , G01S7/52036 , G01S7/52071 , A61B8/08 , G01S7/52034
摘要： An ultrasound display apparatus provides a two-dimensional display of a fluid filled cavity and surrounding wall tissue in the form of a sequence of pixel image frames that are shown on a display screen. The apparatus includes circuitry for indicating wall tissue displacements on the screen on a frame by frame basis. The apparatus includes a pixel classification circuit for classifying pixels in each pixel image frame into two types, i.e., tissue or fluid. A frame comparator determines which pixels change classification from one to another type as between a pair of succeeding frames. A color assignment circuit assigns to changed-type pixels in a frame, a color value which causes the changed pixels to be readily differentiated by a viewing user. Different color values are used from frame to frame on both ventricular expansion and contraction cycles.
摘要翻译： 超声显示装置以显示在显示屏上的像素图像帧序列的形式提供流体填充空腔和周围壁组织的二维显示。 该装置包括用于在逐帧的基础上指示屏幕上的壁组织位移的电路。 该装置包括用于将每个像素图像帧中的像素分类为组织或流体的两种类型的像素分类电路。 帧比较器确定哪个像素在一对后续帧之间改变从一个类型到另一个类型的分类。 颜色分配电路分配帧中的改变类型的像素，使得由观看用户容易地区分改变的像素的颜色值。 在两个心室扩张和收缩周期上，帧间使用不同的颜色值。
-
3.发明授权Quick method and apparatus for identifying a region of interest in an ultrasound display 失效用于识别超声显示器中的感兴趣区域的快速方法和装置
公开(公告)号：US5538003A
公开(公告)日：1996-07-23
申请号：US443979
申请日：1995-05-18
CPC分类号： G01S7/52073 , A61B8/461 , A61B8/467 , A61B8/469 , A61B8/488 , G01S7/52084 , G01S7/22 , G01S7/52036 , Y10S128/916
摘要： An ultrasound display system enables a user to rapidly identify a region of interest (ROI) in a displayed ultrasound image without having to trace the outline of the ROI. The system includes a display and a processor for causing the display to manifest an ultrasound image. A user entry device enables a user to initiate a "quick ROI" identification procedure which causes the processor to superimpose a closed geometric figure on a displayed ultrasound image. The user entry device further enables adjustment of the closed geometric figure to substantially enclose the ROI. A user selection input device, in response to user actuation, causes the processor to identify the boundary of the ROI that lies within the vicinity of an edge of the closed geometric figure and further enables the processor to carry out calculations with respect to the determined ROI boundary.
摘要翻译： 超声显示系统使得用户能够快速地识别所显示的超声图像中的感兴趣区域（ROI），而不必追踪ROI的轮廓。 该系统包括用于使显示器显示超声波图像的显示器和处理器。 用户输入装置使得用户能够启动“快速ROI”识别过程，这使得处理器在显示的超声图像上叠加封闭的几何图形。 用户输入装置还能够调整封闭几何图形以基本上包围ROI。 用户选择输入装置响应于用户致动使得处理器识别位于封闭几何图形的边缘附近的ROI的边界，并且还使处理器能够相对于所确定的ROI进行计算 边界。
-
4.发明授权
公开(公告)号：US5322067A
公开(公告)日：1994-06-21
申请号：US12720
申请日：1993-02-03
CPC分类号： A61B8/463 , A61B8/08 , G01S7/52036 , Y10S128/916
摘要： A method and apparatus for determining the volume of a fluid-filled cavity in a patient's body in real time from an ultrasound image. An ultrasound display of the cavity and the surrounding tissue is obtained. The ultrasound display includes a sequence of ultrasound images. The user traces a fixed region of interest around the image of the cavity at the largest volume for which the volume determination is to be made. The region of interest is subdivided into a predetermined number of segments. Each pixel of the ultrasound image, at least within the region of interest, is classified as a fluid pixel or a tissue pixel. The area of fluid pixels within each segment is determined. The volume of the cavity is calculated from the area of the fluid pixels within each segment of the region of interest using the method of disks. The volume is determined for each ultrasound image in the sequence of ultrasound images to provide the volume of the cavity in real time.
摘要翻译： 一种用于从超声图像实时地确定患者体内的流体填充空腔体积的方法和装置。 获得空腔和周围组织的超声显示。 超声波显示器包括一系列超声图像。 使用者以要进行体积确定的最大体积跟踪腔周围的固定感兴趣区域。 感兴趣区域被细分为预定数量的段。 至少在感兴趣区域内的超声图像的每个像素被分类为流体像素或组织像素。 确定每个段内流体像素的面积。 使用盘的方法从感兴趣区域的每个区段内的流体像素的面积计算空腔的体积。 针对超声图像序列中的每个超声图像确定体积以实时提供腔的体积。
-
公开(公告)号：US5585546A
公开(公告)日：1996-12-17
申请号：US332287
申请日：1994-10-31
CPC分类号： G01S7/52023 , B06B1/0207 , G01H3/005 , G01S7/52019 , G01S7/5205 , B06B2201/20 , H04R17/08
摘要： Apparatus and methods for controlling electrostrictive transducer sensitivity in a pulse-echo medical ultrasound system. Certain characteristics of each transducer element are tested after manufacture and recorded on a storage medium. The stored data is then used, along with certain model relations, for monitoring certain operational parameters of the transducer during use, and feedback compensation applied for maintaining the transducer sensitivity substantailly constant. The parameters to be monitored may include the temperature, acoustic pressure, input power, and a figure of merit determined from the dielectric constant and coupling coefficient.
摘要翻译： 用于在脉冲回波医疗超声系统中控制电致伸缩传感器灵敏度的装置和方法。 每个换能器元件的某些特性在制造后测试并记录在存储介质上。 然后使用存储的数据以及某些模型关系来监测在使用期间传感器的某些操作参数，并且用于维持传感器灵敏度的反馈补偿基本上恒定。 待监测的参数可以包括从介电常数和耦合系数确定的温度，声压，输入功率和品质因数。
-
6.发明授权
公开(公告)号：US4813005A
公开(公告)日：1989-03-14
申请号：US65971
申请日：1987-06-24
申请人： Michael J. Redig , David M. Prater
发明人： Michael J. Redig , David M. Prater
IPC分类号： H04L7/033 , G01R31/3183 , G01R31/319 , H03L7/06 , H03L7/08 , H03L7/081 , H03L7/087 , H03L7/183 , G05B19/02 , H03D3/24 , H03L7/00
CPC分类号： H03L7/081 , G01R31/3191 , G01R31/31922 , H03L7/183 , G01R31/31926
摘要： A device for synchronizing the output test pattern signals of a test circuit with the clock signal of a device under test (DUT). The invention uses a programmable delay in the feedback loop of a phase locked loop system to adjust the phase of the test pattern signals to be synchronized with the clock of the device under test (DUT).
-
公开(公告)号：US06253745B1
公开(公告)日：2001-07-03
申请号：US09460827
申请日：1999-12-14
申请人： David M. Prater
发明人： David M. Prater
IPC分类号： F01K2700
CPC分类号： F02B75/021 , F01K23/065 , F02B2275/32 , F02F2001/247 , Y02T10/142
摘要： A six-stroke cycle engine burns an air-fuel charge for a first power stroke, the exhaust gases being directed to a heat regenerator located in a vapor heating chamber. A second power stroke is produced by injecting fluid directly into the heat regenerator, for generating a second power stroke with the expanded vapor, using the same engine reciprocating mechanism.
摘要翻译： 六冲程循环发动机燃烧用于第一动力冲程的空燃料，废气被引导到位于蒸气加热室中的热再生器。 通过使用相同的发动机往复运动机构将流体直接喷射到热量再生器中，以产生具有膨胀的蒸气的第二动力冲程来产生第二动力冲程。
-
公开(公告)号：US5257624A
公开(公告)日：1993-11-02
申请号：US782691
申请日：1991-10-25
CPC分类号： G01S7/52033
摘要： An operator adjusted lateral gain control (LGC) structure for an ultrasound imaging system, which may already include an operator adjusted time gain compensation (TGC) gain control structure. The LGC structure enables an operator to adjust the gain of one or more scan lines independently of the gain of at least one other scan line, said gain as a result of the LGC control being substantially constant along said one or more scan lines.
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.021 秒)
