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公开(公告)号：EP1902424B1
公开(公告)日：2009-11-11
申请号：EP06800003.3
申请日：2006-07-06
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , A61B5/055 , A61B5/7257 , A61B6/032 , A61B6/037 , A61B6/4441 , A61B6/507 , G01R33/4824 , G01R33/561 , G01R33/5619 , G01R33/56308
摘要： An image reconstruction method includes reconstructing a composite image of a subject using a conventional reconstruction method. The composite image employs the best information available regarding the subject of the scan and this information is used to constrain the reconstruction of highly undersampled image frames. An image frame is reconstructed using limited acquired data and image quality is improved using a priori information of the subject by weighting pixel values therein by values of corresponding pixels in the composite image.
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2.发明公开RECONSTRUCTION OF IMAGES OF THE BEATING HEART USING A HIGHLY CONSTRAINED BACKPROJECTION 审中-公开跳动的心脏图像的带有强烈有限公司REAR重建
公开(公告)号：EP1927009A1
公开(公告)日：2008-06-04
申请号：EP06814296.7
申请日：2006-09-07
IPC分类号： G01R33/563
CPC分类号： G01R33/56308 , A61B5/055 , A61B5/0803 , A61B5/7257 , A61B5/7285 , A61B6/503 , A61B6/541 , G01R33/4824 , G01R33/4835 , G01R33/5608 , G01R33/561 , G01R33/5619 , G01R33/56325 , G01R33/5673 , G06T11/006 , G06T2211/412 , G06T2211/424
摘要： Projection views of the moving heart and stationary background tissues are acquired and processed to provide corresponding moving tissue projection views. An average image is reconstructed in a conventional manner and a moving tissue image is reconstructed using a highly constrained backprojection method and a composite image formed from selected moving tissue projection views. The average image is then combined with the moving tissue image. The method is disclosed in a cardiac gated MRI scan.
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公开(公告)号：EP1902328A1
公开(公告)日：2008-03-26
申请号：EP06786377.9
申请日：2006-07-06
IPC分类号： G01R33/561
CPC分类号： G06T11/006 , A61B5/055 , A61B5/7257 , A61B6/032 , A61B6/037 , A61B6/4441 , A61B6/507 , G01R33/4824 , G01R33/561 , G01R33/5619 , G01R33/56308
摘要： Two-dimensional or three-dimensional, time-resolved MR frame images are acquired during a dynamic study of a subject. A composite MR image is produced and this is used to reconstruct each image frame by weighting the backprojection of each projection view acquired for that image frame (constrained backprojection). The composite image may be reconstructed from views acquired separately, or it may be produced by combining views acquired during the course of the dynamic study. A number of different clinical applications of the method are described.
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公开(公告)号：EP1644897B1
公开(公告)日：2007-08-01
申请号：EP04776523.5
申请日：2004-06-15
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/412 , G06T2211/421 , Y10S378/901
摘要： A generalized projection-slice theorem for divergent beam projections is disclosed. The theorem results in a method for processing the Fourier transform of the divergent beam projections at each view acquired by a CT system to the Fourier transform of the object function. Using this method, an inverse Fourier transform may be used to reconstruct tomographic images from the acquired divergent beam projections.
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5.发明公开MAGNETIC RESONANCE ANGIOGRAPHY USING FLOATING TABLE PROJECTION IMAGING 有权磁共振使用成像用暂停的患者台上PROJECTIONS血管造影
公开(公告)号：EP1430327A1
公开(公告)日：2004-06-23
申请号：EP02775809.3
申请日：2002-09-13
IPC分类号： G01R33/563
CPC分类号： G01R33/28 , G01R33/56375 , Y10S128/922
摘要： A 3D projection reconstruction pulse sequence is employed to acquire CEMRA data as the subject is continuously moved through the field of view of the MRI system. The acquired k-spaced data is phase corrected to offset the table motion and the corrected data is used to reconstruct an image over a field of view that far exceeds the size of the MRI system field of view. In one embodiment the image is formed as a set of anatomic subregion images which are concatenated to form a single image and in another embodiment a series of images of each anatomic subregion are produced to depict the dynamic inflow of contrast agent.
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公开(公告)号：EP1902328B1
公开(公告)日：2015-11-11
申请号：EP06786377.9
申请日：2006-07-06
IPC分类号： G01R33/561
CPC分类号： G06T11/006 , A61B5/055 , A61B5/7257 , A61B6/032 , A61B6/037 , A61B6/4441 , A61B6/507 , G01R33/4824 , G01R33/561 , G01R33/5619 , G01R33/56308
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公开(公告)号：EP1047951B1
公开(公告)日：2011-03-30
申请号：EP98962092.7
申请日：1998-12-11
IPC分类号： G01R33/54 , G01R33/565 , G01R33/561
CPC分类号： G01R33/563 , G01R33/281 , G01R33/4824 , G01R33/54 , G01R33/561
摘要： High resolution and high speed MR imaging is provided for imaged objects in which the brightness of the imaged objects dominates the surrounding tissues by using sparse angular sampling and projection acquisition techniques. Individual objects throughout a large field of view are imaged at a rate and resolution normally associated with small field of view techniques. For applications such as angiography, artifacts associated with sparse angular sampling are acceptable. Volume images are acquired by combining sparsely sampled projection in two dimensions with weighted Fourier acquisition in the third dimension.
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8.发明授权THREE-DIMENSIONAL PHASE CONTRAST MAGNETIC RESONANCE IMAGING USING INTERLEAVED PROJECTION-RECONSTRUCTION DATA 有权三相CONTRAST MAGNETIC PICTURE嵌套投影重建DATA
公开(公告)号：EP1444530B1
公开(公告)日：2008-08-13
申请号：EP02803195.3
申请日：2002-11-08
IPC分类号： G01R33/563
CPC分类号： A61B5/7292 , A61B5/7289 , G01R33/56308 , G01R33/56316
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9.发明公开DIGITAL SUBTRACTION MAGNETIC RESONANCE ANGIOGRAPHY WITH IMAGE ARTIFACT SUPPRESSION 失效DIGITAL SUBTRAHIERUNGS血管造影是指具有抑制的图像伪影磁共振
公开(公告)号：EP0852731A1
公开(公告)日：1998-07-15
申请号：EP97905750.0
申请日：1997-02-03
CPC分类号： G01R33/561 , G01R33/281 , G01R33/5619 , G01R33/563 , G01R33/56308
摘要： A dynamic MRA study of a subject is performed using a 3D fast gradient-recalled echo pulse sequence. The frame rate of the resulting series of reconstructed images is increased by sampling a central region of k-space at a higher rate than the peripheral regions of k-space. Artifacts caused by variations in signal strength as the contrast agent enters the region of interest are reduced by renormalizing the acquired data. 2D image frames are reconstructed using planes passing near the center of k-space to enable the operator to select which 3D data sets should be used to reconstruct diagnostic images.
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10.发明授权
公开(公告)号：EP1927007B1
公开(公告)日：2016-08-17
申请号：EP06803992.4
申请日：2006-09-21
IPC分类号： G01R33/561 , G01R33/563
CPC分类号： G01R33/56308 , A61B5/055 , A61B5/0803 , A61B5/7257 , A61B5/7285 , A61B6/503 , A61B6/541 , G01R33/4824 , G01R33/4835 , G01R33/5608 , G01R33/561 , G01R33/5619 , G01R33/56325 , G01R33/5673 , G06T11/006 , G06T2211/412 , G06T2211/424
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