公开(公告)号：US20080044097A1

公开(公告)日：2008-02-21

申请号：US11779459

申请日：2007-07-18

申请人： Smita Krishnan ,  Qiang Cheng ,  Min Xie

发明人： Smita Krishnan ,  Qiang Cheng ,  Min Xie

IPC分类号： G06K9/38

CPC分类号： H04N19/94 ,  H04N19/124

摘要： A system and method provide image data compression and reconstruction technique optimizations that may enhance (1) local gradient quantization, (2) quantized gradient merging, and/or (3) prediction and/or prediction error computations. A data structure may be created before image data compression that provides access to pre-computed quantization values during image data compression. Quantization merging may be performed by a one-to-one mapping of quantization vectors into corresponding quantization values. Subsequently, the sign of the quantization values may be checked to further reduce the number of logical steps required. A prediction technique may alleviate the effect that noise of neighboring pixels has on the current pixel. The optimizations may be applied to a JPEG-LS based algorithm to speed up processing by approximately 50%, while maintaining error controllability and compression ratio. The optimizations may enhance remote rendering and viewing of medical images in a client server environment.

摘要翻译： 系统和方法提供可以增强（1）局部梯度量化，（2）量化梯度合并和/或（3）预测和/或预测误差计算的图像数据压缩和重构技术优化。 可以在图像数据压缩之前创建数据结构，该图像数据压缩在图像数据压缩期间提供对预先计算的量化值的访问。 量化合并可以通过量化矢量的一对一映射到对应的量化值来执行。 随后，可以检查量化值的符号，以进一步减少所需的逻辑步骤的数量。 预测技术可以减轻相邻像素的噪声对当前像素的影响。 优化可以应用于基于JPEG-LS的算法，以加速大约50％的处理，同时保持误差可控性和压缩比。 优化可以增强在客户端服务器环境中远程呈现和查看医学图像。

公开(公告)号：US20090028399A1

公开(公告)日：2009-01-29

申请号：US12040244

申请日：2008-02-29

申请人： Smita Krishnan ,  Min Xie

发明人： Smita Krishnan ,  Min Xie

IPC分类号： G06K9/00

CPC分类号： G06T5/002 ,  G06T15/08 ,  G06T2207/10072 ,  G06T2207/20056

摘要： A method for efficiently rendering a chessboard artifact free Maximum intensity projection (MIP) image is disclosed is disclosed. MIP is a widely used volumetric rendering technology in medical diagnostic imaging. When a volume dataset containing wideband noise is rendered using MIP, the resultant MIP image can show chessboard or stripe like artifacts. A method is disclosed for automatically detecting stripe artifacts present in the MIP rendered images and to determine whether suitable mitigation algorithms need to be applied during rendering. This automatic detection method eliminates the need for human review of images to determine whether mitigation is required, and thus speeds the overall process.

摘要翻译： 公开了一种有效渲染棋盘无伪影的方法。最大强度投影（MIP）图像。 MIP是医学诊断成像中广泛使用的体积渲染技术。 当使用MIP渲染包含宽带噪声的卷数据集时，所得到的MIP图像可以显示棋盘或条纹像伪像。 公开了一种用于自动检测MIP渲染图像中存在的条纹伪影的方法，并且确定在渲染期间是否需要适用的缓解算法。 这种自动检测方法不需要对图像进行人工检查，以确定是否需要缓解，从而加快整个过程。

公开(公告)号：US20080030500A1

公开(公告)日：2008-02-07

申请号：US11771329

申请日：2007-06-29

申请人： Smita Krishnan ,  Robert Schneider ,  Lining Yang ,  Min Xie

发明人： Smita Krishnan ,  Robert Schneider ,  Lining Yang ,  Min Xie

IPC分类号： G06T17/00

CPC分类号： G06T15/08

摘要： A system and method for rendering an MIP image that has reduced high frequency component loss and reduced chessboard artifacts. The method includes accessing volumetric data, having random noise. Rays are shot, or cast, through the volumetric data, onto a voxel grid, which has grid points. Sampling data along each ray is performed to obtain selected sample data points on the ray and a distance from a selected point to a nearest grid point is determined. A voxel intensity value is accessed at each selected point, as a function of the position of the selected point relative to the nearest grid point. The difference between the voxel intensity at each selected point is minimized an image is rendered from the volumetric data as a function of the minimizing step. Multiple methods may be used to minimize the difference between the voxel intensity at each selected point. These include for example 1.) applying a localized low pass filter, 2.) applying a localized high order interpolation kernel, and 3.) applying localized distance remapping methods.

摘要翻译： 一种用于渲染MIP图像的系统和方法，其降低了高频分量损耗并减少了棋盘伪影。 该方法包括访问具有随机噪声的体积数据。 光线通过体积数据被射击或投射到具有网格点的体素网格上。 执行沿着每个射线的采样数据以获得在射线上的选定的样本数据点，并确定从选定点到最近的网格点的距离。 根据所选点相对于最近的网格点的位置的函数，在每个选定的点处访问体素强度值。 每个选定点处的体素强度之间的差异被最小化，作为最小化步骤的函数从体积数据呈现图像。 可以使用多种方法来最小化每个选定点处的体素强度之间的差异。 这些包括例如1.）应用局部低通滤波器，2.）应用局部高阶插值内核，以及3.）应用局部距离重映射方法。

公开(公告)号：US07965879B2

公开(公告)日：2011-06-21

申请号：US12040244

申请日：2008-02-29

申请人： Smita Krishnan ,  Min Xie

发明人： Smita Krishnan ,  Min Xie

IPC分类号： G06K9/00

CPC分类号： G06T5/002 ,  G06T15/08 ,  G06T2207/10072 ,  G06T2207/20056

摘要： A method for efficiently rendering a chessboard artifact free Maximum intensity projection (MIP) image is disclosed is disclosed. MIP is a widely used volumetric rendering technology in medical diagnostic imaging. When a volume dataset containing wideband noise is rendered using MIP, the resultant MIP image can show chessboard or stripe like artifacts. A method is disclosed for automatically detecting stripe artifacts present in the MIP rendered images and to determine whether suitable mitigation algorithms need to be applied during rendering. This automatic detection method eliminates the need for human review of images to determine whether mitigation is required, and thus speeds the overall process.

摘要翻译： 公开了一种有效渲染棋盘无伪影的方法。最大强度投影（MIP）图像。 MIP是医学诊断成像中广泛使用的体积渲染技术。 当使用MIP渲染包含宽带噪声的卷数据集时，所得到的MIP图像可以显示棋盘或条纹像伪像。 公开了一种用于自动检测MIP渲染图像中存在的条纹伪影的方法，并且确定在渲染期间是否需要适用的缓解算法。 这种自动检测方法不需要对图像进行人工检查，以确定是否需要缓解，从而加快整个过程。

公开(公告)号：US07903113B2

公开(公告)日：2011-03-08

申请号：US11771329

申请日：2007-06-29

申请人： Smita Krishnan ,  Robert Schneider ,  Lining Yang ,  Min Xie

发明人： Smita Krishnan ,  Robert Schneider ,  Lining Yang ,  Min Xie

IPC分类号： G06T15/00

CPC分类号： G06T15/08

摘要： A system and method for rendering an MIP image that has reduced high frequency component loss and reduced chessboard artifacts. The method includes accessing volumetric data, having random noise. Rays are shot, or cast, through the volumetric data, onto a voxel grid, which has grid points. Sampling data along each ray is performed to obtain selected sample data points on the ray and a distance from a selected point to a nearest grid point is determined. A voxel intensity value is accessed at each selected point, as a function of the position of the selected point relative to the nearest grid point. The difference between the voxel intensity at each selected point is minimized an image is rendered from the volumetric data as a function of the minimizing step. Multiple methods may be used to minimize the difference between the voxel intensity at each selected point. These include for example 1.) applying a localized low pass filter, 2.) applying a localized high order interpolation kernel, and 3.) applying localized distance remapping methods.

摘要翻译： 一种用于渲染MIP图像的系统和方法，其降低了高频分量损耗并减少了棋盘伪影。 该方法包括访问具有随机噪声的体积数据。 光线通过体积数据被射击或投射到具有网格点的体素网格上。 执行沿着每个射线的采样数据以获得在射线上的选定的样本数据点，并确定从选定点到最近的网格点的距离。 根据所选点相对于最近的网格点的位置的函数，在每个选定的点处访问体素强度值。 每个选定点处的体素强度之间的差异被最小化，作为最小化步骤的函数从体积数据呈现图像。 可以使用多种方法来最小化每个选定点处的体素强度之间的差异。 这些包括例如1.）应用局部低通滤波器，2.）应用局部高阶插值内核，以及3.）应用局部距离重映射方法。

公开(公告)号：US20130290019A1

公开(公告)日：2013-10-31

申请号：US13456397

申请日：2012-04-26

申请人： James Pressler ,  Smita Krishnan ,  Alfred George Tiemann, III ,  Arnold Teres

发明人： James Pressler ,  Smita Krishnan ,  Alfred George Tiemann, III ,  Arnold Teres

IPC分类号： G06Q50/24

CPC分类号： G06Q10/10 ,  G06Q50/24 ,  G16H15/00 ,  G16H30/20 ,  G16H30/40

摘要： A system populates a medical imaging examination report of a patient with generated text. An interface receives a patient identifier and data identifying characteristics of a medical imaging examination. At least one repository stores information derived using the patient identifier and the data identifying characteristics of the medical imaging examination. The information associates patient medical history data including, a patient diagnosis and a patient prior medical condition with medical imaging examination type and image acquisition characteristics including anatomical region imaged. A report processor uses the information in automatically selecting a text phrase from multiple predetermined text phrases. The report processor automatically populates the selected text phrase into a medical imaging examination report and prompts user data entry.

摘要翻译： 系统填充具有生成文本的患者的医学成像检查报告。 接口接收患者标识符和识别医学成像检查特征的数据。 至少一个储存库存储使用患者识别符导出的信息和识别医学成像检查特征的数据。 该信息将包括患者诊断和患者在先医疗状况之间的患者病史数据与医学成像检查类型和包括解剖区域成像的图像采集特性相关联。 报告处理器使用该信息来自动选择来自多个预定文本短语的文本短语。 报告处理器自动将所选择的文本短语填充到医学影像检查报告中，并提示用户输入数据。