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21. 发明授权

US08548216B2 Method for noise reduction of CT images and image processing system 有权
标题翻译： CT图像和图像处理系统降噪方法
公开(公告)号：US08548216B2
公开(公告)日：2013-10-01
申请号：US12591871
申请日：2009-12-03
申请人： Rainer Raupach
发明人： Rainer Raupach
IPC分类号： A61B6/03
CPC分类号： A61B6/482 , A61B6/032 , G06T5/002 , G06T5/10 , G06T5/20 , G06T5/50 , G06T2207/10081 , G06T2207/20221 , G06T2207/30004
摘要： A method is disclosed for noise reduction of CT image data and an image processing system is disclosed. An object under examination is scanned and at least two CT image datasets are created, each being undertaken on the basis of a different x-ray generation process. Subsequently, the image datasets are split up into at least two split-up image datasets, with a lowest local frequency band and at least one high local frequency band. In at least one embodiment, this is followed by the determination of the noise in at least one of the image datasets for each x-ray spectrum and calculation of at least one new image dataset using an unchanged split-up image dataset in each case with the lowest frequency band and an image dataset created from a noise-minimized weighted combination of split-up image datasets, which originate from the scans with different x-ray energy spectrums.
摘要翻译：公开了一种降低CT图像数据的方法，并且公开了一种图像处理系统。扫描被检查物体，并创建至少两个CT图像数据集，每个CT图像数据集基于不同的x射线生成过程进行。随后，将图像数据集分成至少两个具有最低本地频带和至少一个高本地频带的分割图像数据集。在至少一个实施例中，随后确定每个X射线谱的至少一个图像数据集中的噪声，并且使用未改变的分割图像数据集计算至少一个新的图像数据集，最低频带和由分割图像数据集的噪声最小化加权组合创建的图像数据集，其来自具有不同x射线能谱的扫描。

22. 发明授权

US08509379B2 Method and X-ray device for adapting greyscale windowing 有权
标题翻译：用于适应灰度窗口的方法和X射线装置
公开(公告)号：US08509379B2
公开(公告)日：2013-08-13
申请号：US13360964
申请日：2012-01-30
申请人： Ute Feuerlein , Ernst Klotz , Rainer Raupach , Bernhard Schmidt
发明人： Ute Feuerlein , Ernst Klotz , Rainer Raupach , Bernhard Schmidt
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： A61B6/032 , A61B6/405 , A61B6/481 , A61B6/5258 , A61B6/545 , A61B6/583 , G06T5/009 , H05G1/32
摘要： In a method and x-ray device to adapt the width and the position of a central value of a greyscale windowing for imaging with the x-ray device based on CT values determined with said x-ray device, the adaptation takes place within the scope of a determination and adjustment of an acquisition tube voltage of an x-ray tube of the x-ray device for an examination of a defined tissue of a patient, assuming a reference tube voltage for the examination of the defined tissue of the patient, and in which a width and position of a central value of the greyscale windowing that are associated with the reference tube voltage are automatically adapted to the acquisition tube voltage.
摘要翻译：在一种方法和x射线装置中，根据由所述X射线装置确定的CT值，使用x射线装置进行成像的灰度窗口的中心值的宽度和位置调整，适应范围在确定和调整x射线装置的X射线管的采集管电压，用于检查患者的确定的组织，假设用于检查患者的确定的组织的参考管电压，以及其中与参考管电压相关联的灰度窗口的中心值的宽度和位置自动适应于采集管电压。

23. 发明申请

US20120140894A1 METHOD AND X-RAY DEVICE TO DETERMINE THE VALUE OF THE TUBE VOLTAGE 有权
标题翻译：用于确定管体电压值的方法和X射线装置
公开(公告)号：US20120140894A1
公开(公告)日：2012-06-07
申请号：US13293379
申请日：2011-11-10
申请人： Ute Feuerlein , Sebastian Gehrsitz , Christiane Koch , Gerd Mayer , Stefan Muehleck , Rainer Raupach
发明人： Ute Feuerlein , Sebastian Gehrsitz , Christiane Koch , Gerd Mayer , Stefan Muehleck , Rainer Raupach
IPC分类号： H05G1/32
CPC分类号： A61B6/032 , A61B6/50 , A61B6/542 , A61B6/545 , A61B6/583
摘要： In a method and x-ray device to determine the value of an x-ray tube voltage to generate at least one image of defined tissue to be examined, at least one provided parameter is used that establishes or describes the desired image quality; based on the dependency of the contrast of the defined tissue to be examined on the spectrum of the x-ray radiation or on the value of the tube voltage of the x-ray tube. The tube voltage is determined also based on a contrast-to-noise ratio that is constantly maintained under consideration of the aforementioned parameter such that the dose of x-ray radiation applied to the patient is optimally low upon setting the value of the tube voltage at the x-ray tube and the acquisition of at least one x-ray projection of the defined tissue.
摘要翻译：在用于确定x射线管电压的值以产生待检查的所定义组织的至少一个图像的方法和x射线装置中，使用至少一个提供的参数来建立或描述所需的图像质量; 基于要检查的所确定组织的对比度对X射线辐射的光谱或X射线管的管电压的值的依赖性。管电压还基于在考虑上述参数下不断保持的对比噪声比来确定，使得施加到患者的x射线辐射的剂量在将管电压的值设置在 X射线管和获取所定义组织的至少一个X射线投影。

24. 发明授权

US08121251B2 Method for post-processing raw detector signals, a computer program product, a computer readible medium and a radiation detection device 有权
标题翻译：用于后处理原始检测器信号的方法，计算机程序产品，计算机可读介质和放射线检测装置
公开(公告)号：US08121251B2
公开(公告)日：2012-02-21
申请号：US12292372
申请日：2008-11-18
申请人： Rainer Raupach , Karl Stierstorfer
发明人： Rainer Raupach , Karl Stierstorfer
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/037 , A61B6/5205 , A61B6/583 , A61B6/585 , G01T1/2985 , G01T7/005
摘要： Methods for post-processing raw detector signals of an x-ray or gamma detector are disclosed. According to at least one embodiment of the invention, raw detector signals are filtered, an associated filtered signal is determined at least for a subset of the raw detector signals, and those filtered signals whose signal value is less than zero are then respectively replaced by a signal value greater than zero.
摘要翻译：公开了用于后处理x射线或γ检测器的原始检测器信号的方法。根据本发明的至少一个实施例，对原始检测器信号进行滤波，至少对于原始检测器信号的子集确定相关联的滤波信号，并且那些信号值小于零的那些滤波信号分别被替换为信号值大于零。

25. 发明申请

US20110317901A1 Temporal Resolution In Cardio CT 有权
标题翻译：心脏CT时间分辨率
公开(公告)号：US20110317901A1
公开(公告)日：2011-12-29
申请号：US13164796
申请日：2011-06-21
申请人： Thomas Allmendinger , Herbert Bruder , Thomas Flohr , Rainer Raupach , Harald SchÖndube , Karl Stierstorfer
发明人： Thomas Allmendinger , Herbert Bruder , Thomas Flohr , Rainer Raupach , Harald SchÖndube , Karl Stierstorfer
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/4441 , A61B6/481 , A61B6/486 , A61B6/503 , A61B6/507 , A61B6/5211 , A61B6/5264 , A61B6/5288 , A61B2090/3762 , G06T5/002 , G06T5/50 , G06T11/006 , G06T2207/10081 , G06T2207/20221 , G06T2207/30048 , G06T2211/412 , G06T2211/436
摘要： A method is disclosed for the reconstruction of picture data of a moving object under examination from measurement, with the measurement data having been recorded beforehand for a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first picture data is computed from a complete measurement dataset of the measurement data for a picture reconstruction, and second picture data is computed from an incomplete measurement dataset for a computed tomography picture reconstruction. The first picture data and the second picture data are combined into third picture data, with the combination being computed using location-dependent movement information of the object under examination.
摘要翻译：公开了一种用于重建从测量中检查的移动物体的图像数据的方法，其中测量数据已被预先记录在计算机断层摄影系统的辐射源和被检查物体之间的相对旋转运动。在至少一个实施例中，从用于图像重建的测量数据的完整测量数据集计算第一图像数据，并且从用于计算机断层摄影图像重建的不完整测量数据集计算第二图像数据。将第一图像数据和第二图像数据组合成第三图像数据，使用正在检查的对象的位置相关运动信息来计算组合。

26. 发明申请

US20110293160A1 Iterative Reconstruction Of CT Images Without A Regularization Term 有权
标题翻译：没有正则化术语的CT图像的迭代重建
公开(公告)号：US20110293160A1
公开(公告)日：2011-12-01
申请号：US13111315
申请日：2011-05-19
申请人： Herbert Bruder , Martin Petersilka , Rainer Raupach , Karl Schwarz
发明人： Herbert Bruder , Martin Petersilka , Rainer Raupach , Karl Schwarz
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , A61B6/5258 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing image data of an examination object from measured data, wherein the measured data was captured previously during a relative rotary motion between a radiation source of a computed tomography system and the examination object. In at least one embodiment, the measured data is modified to achieve a particular grayscale characteristic of the image data to be reconstructed. The image data is calculated by way of an iterative algorithm using the modified measured data, wherein no arithmetic step for reducing noise is employed in the iterations.
摘要翻译：公开了一种用于从测量数据重建检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源和检查对象之间的相对旋转运动期间先前捕获测量数据。在至少一个实施例中，修改测量数据以实现要重建的图像数据的特定灰度特性。通过使用修改的测量数据的迭代算法计算图像数据，其中在迭代中不采用用于降低噪声的算术步骤。

27. 发明申请

US20110280458A1 Method For The Reduction Of Image Artifacts, In Particular Of Metal Artifacts, In CT Image Data 有权
标题翻译：用于减少图像伪影的方法，特别是金属人造物，CT图像数据
公开(公告)号：US20110280458A1
公开(公告)日：2011-11-17
申请号：US13107302
申请日：2011-05-13
申请人： Thomas Flohr , Bernhard Krauss , Rainer Raupach , Bernhard Schmidt
发明人： Thomas Flohr , Bernhard Krauss , Rainer Raupach , Bernhard Schmidt
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , A61B6/5258 , G06T5/50 , G06T11/008 , G06T2200/04 , G06T2207/10081 , G06T2207/10144 , G06T2207/20221 , G06T2211/408
摘要： A method is disclosed for the reduction of image artifacts, in particular metal artifacts, during the generation of computed tomography image data of an object. In at least one embodiment of the method, two CT image data sets are generated with different medium x-ray energies. By way of a weighted combination of the two CT image data sets, a new image data set is calculated. The weighting factor employed in the weighted combination is here selected in such a way that the image artifacts in the new CT image data set are significantly reduced compared with the image artifacts in the two original CT image data sets. In this way it is possible in a simple manner significantly to reduce in particular metal artifacts in CT images.
摘要翻译：公开了一种在物体的计算机断层摄影图像数据的生成期间减少图像伪影，特别是金属伪像的方法。在该方法的至少一个实施例中，使用不同的中等x射线能量生成两个CT图像数据集。通过两个CT图像数据集的加权组合，计算新的图像数据集。在加权组合中使用的加权因子在这里被选择，使得与两个原始CT图像数据集中的图像伪像相比，新CT图像数据集中的图像伪影显着减少。以这种方式，可以以简单的方式显着地减少CT图像中的特定金属伪影。

28. 发明申请

US20100246917A1 CONTRAST-DEPENDENT REGULARIZATION STRENGTH IN THE ITERATIVE RECONSTRUCTION OF CT IMAGES 有权
标题翻译： CT图像迭代重建中的对比度正规化强度
公开(公告)号：US20100246917A1
公开(公告)日：2010-09-30
申请号：US12729272
申请日：2010-03-23
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Martin Sedlmair , Heinrich Wallschlager
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach , Martin Sedlmair , Heinrich Wallschlager
IPC分类号： G06K9/00
CPC分类号： A61B6/481 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/503 , A61B6/504 , A61B6/507 , A61B6/541 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing image data of an examination object from measured data, the measured data being captured during a rotating movement of a radiation source of a computed tomography system around the examination object. In at least one embodiment, different iteration images of the examination object are determined successively from the measured data by way of an iterative algorithm, wherein with the iterative algorithm the current iteration image at any one time is high-pass-filtered and weighted as a function of contrast using a variable which contains contrast information relating to the current iteration image at that time.
摘要翻译：公开了一种用于从测量数据重建检查对象的图像数据的方法，所测量的数据在计算机断层扫描系统的辐射源围绕检查对象的旋转运动期间被捕获。在至少一个实施例中，通过迭代算法从测量数据连续地确定检查对象的不同迭代图像，其中利用迭代算法，任何时间的当前迭代图像被高通滤波并加权为使用包含与当时的当前迭代图像有关的对比度信息的变量的对比度的功能。

29. 发明申请

US20100220912A1 METHOD FOR THE NOISE REDUCTION OF CT IMAGE DATA AND IMAGE PROCESSING SYSTEM 有权
标题翻译：噪声减少CT图像数据和图像处理系统的方法
公开(公告)号：US20100220912A1
公开(公告)日：2010-09-02
申请号：US12710423
申请日：2010-02-23
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , G06T5/50 , G06T11/005 , G06T2207/10081 , G06T2207/10144 , G06T2207/20012 , G06T2207/20056 , G06T2207/20216 , G06T2207/30004
摘要： Method for the noise reduction of CT image data and an image processing system are disclosed, with a scanning of an examination object and generation of at least two CT image data records each taking place on the basis of a different x-ray energy spectrum. In at least one embodiment, a break-down of the data image records into at least two broken-down image data records takes place in each instance, with a lowest local frequency band (f(1)) with the index k=1 and at least one high local frequency band (f(k)) with the index k=2 to N. In at least one embodiment, the determination of the noise into at least one of the image data records per x-ray energy spectrum and calculation of at least one new image data record takes place in each instance by using an unchanged broken-down image data record with the lowest local frequency band and an image data record, generated from a noise-minimized weighted combination of broken-down image data records, which originate from the scannings using different x-ray energy spectra.
摘要翻译：公开了用于CT图像数据的降噪的方法和图像处理系统，其中扫描检查对象并且基于不同的x射线能量谱产生至少两个CT图像数据记录。在至少一个实施例中，数据图像记录分解成至少两个分解图像数据记录，每个情况下都具有索引k = 1的最低本地频带（f（1）），并且至少一个具有索引k = 2至N的高本地频带（f（k））。在至少一个实施例中，将噪声确定为每个x射线能谱和计算中的至少一个图像数据记录至少一个新的图像数据记录在每个实例中通过使用从分解图像数据记录的噪声最小化的加权组合产生的具有最低本地频带和图像数据记录的未变分解图像数据记录来进行，其来源于使用不同x射线能谱的扫描。

30. 发明申请

US20100092060A1 X-Ray CT system and method for creating tomographic recordings with two x-ray energy spectra 有权
标题翻译： X射线CT系统和用于利用两个X射线能谱创建断层摄影记录的方法
公开(公告)号：US20100092060A1
公开(公告)日：2010-04-15
申请号：US12588248
申请日：2009-10-08
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： A61B6/482 , A61B6/032 , A61B6/4014 , A61B6/507
摘要： An x-ray CT system and a method are disclosed for creating tomographic recordings with the aid of an x-ray CT system, with two emitter/detector arrangements operating with an angular offset on a gantry with at least two different x-ray energy spectra. In at least one embodiment, at least one first recording is reconstructed from detector data from two quarter rotations with different x-ray energy spectra and at least one second recording is created from detector data of a scan of at least one of the emitter/detector arrangements over a half rotation. According to at least one embodiment of the invention, the recordings are subjected to high-pass filtering or low-pass filtering in respect of their spatial frequencies and then the filtered recordings are combined to give a resulting recording.
摘要翻译：公开了一种借助X射线CT系统创建断层摄影记录的X射线CT系统和方法，其中两个发射器/检测器装置在具有至少两个不同x射线能谱的台架上以角度偏移运动。在至少一个实施例中，至少一个第一记录是从具有不同X射线能量光谱的二分之一旋转的检测器数据重建的，并且至少一个第二记录是从发射器/检测器中的至少一个的扫描的检测器数据产生的安排半圈以上。根据本发明的至少一个实施例，记录对其空间频率进行高通滤波或低通滤波，然后组合滤波后的记录以得到最终的记录。

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