Filters








1,298 Hits in 4.6 sec

Vessel extraction in medical images by wave-propagation and traceback

F.K.H. Quek, C. Kirbas
2001 IEEE Transactions on Medical Imaging  
Representing the reciprocal of this likelihood image as an array of refractive indices, we propagate a digital wave through the image from the base of the vascular tree.  ...  This paper presents an approach for the extraction of vasculature from angiography images by using a wave propagation and traceback mechanism.  ...  Our future work will focus on the 3D wave propagation and automated 3D traceback to extract the entire vascular tree in 3D data set.  ... 
doi:10.1109/42.913178 pmid:11321591 fatcat:3uoxnr3ld5hxlpc7kjrd6cjp3m

A review of vessel extraction techniques and algorithms

Cemil Kirbas, Francis Quek
2004 ACM Computing Surveys  
While we have mainly targeted the extraction of blood vessels, neurosvascular structure in particular, we have also reviewed some of the segmentation methods for the tubular objects that show similar characteristics  ...  Segmentation methods vary depending on the imaging modality, application domain, method being automatic or semi-automatic, and other specific factors.  ...  Finally, the local widths of the segmented object is estimated using points on the ridges. The authors show results of a vascular tree extracted from a MR angiogram.  ... 
doi:10.1145/1031120.1031121 fatcat:7zms3avnjrfd7plwcitqx3cdiq

Model-based morphological segmentation and labeling of coronary angiograms

K. Haris, S.N. Efstratiadis, N. Maglaveras, C. Pappas, J. Gourassas, G. Louridas
1999 IEEE Transactions on Medical Imaging  
A method for extraction and labeling of the coronary arterial tree (CAT) using minimal user supervision in single-view angiograms is proposed.  ...  Using the marked ASEA, an artery gradient image is constructed where all the ASEA pixels (except the skeleton ones) are assigned the gradient magnitude of the original image.  ...  ACKNOWLEDGMENT The authors would like to thank the three reviewers for their very helpful comments on the manuscript.  ... 
doi:10.1109/42.811312 pmid:10628959 fatcat:k5on4xbinrdyfkuaaz5nx3cw6u

Two New Stenosis Detection Methods of Coronary Angiograms [article]

Yaofang Liu, Xinyue Zhang, Wenlong Wan, Shaoyu Liu, Yingdi Liu, Hu Liu, Xueying Zeng, Qing Zhang
2021 arXiv   pre-print
The first one is an automatic method, which can automatically extract the entire coronary artery tree and mark all the possible stenoses. The second one is an interactive method.  ...  Experiments show that the proposed methods are robust for angiograms with various vessel structures.  ...  The automatic stenosis detection method can automatically extract the coronary artery tree, calculate the diameters and stenotic degrees, and mark the stenoses.  ... 
arXiv:2108.01516v2 fatcat:uakiecihjvadbesgdcdwh5bpo4

Two New Stenosis Detection Methods of Coronary Angiograms [article]

Yaofang Liu, Xinyue Zhang, Wenlong Wan, Shaoyu Liu, Yingdi Liu, Hu Liu, Xueying Zeng, Qing Zhang
2021 arXiv   pre-print
The first one is an automatic method, which can automatically extract the entire coronary artery tree and mark all the possible stenoses. The second one is an interactive method.  ...  Experiments show that the proposed methods are robust for angiograms with various vessel structures.  ...  The automatic stenosis detection method can automatically extract the coronary artery tree, calculate the diameters and stenotic degrees, and mark the stenoses.  ... 
arXiv:2112.06149v2 fatcat:zgxdukowtfgkdaciru6sictsqu

Computer assisted coronary intervention by use of on-line 3D reconstruction and optimal view strategy [chapter]

S. -Y. James Chen, John D. Carroll
1998 Lecture Notes in Computer Science  
A novel method has been developed for on-line reconstruction of the 3D coronary arterial tree based on a pair of routine angiograms acquired from any two arbitrary viewing angles using a single-plane or  ...  By use of the three maps, the views with minimal foreshortening and vessel overlap for the selected arterial segment of interest can be determined to guide subsequent angiogram acquisitions for interventional  ...  Groves in providing some angiograms and Keith E. Hellman in providing graphical user interface for image transfer is greatly appreciated.  ... 
doi:10.1007/bfb0056222 fatcat:fljo3reltvbmpkctwmhe7sqoxa

Topology Aware Quad Dominant Meshing for Vascular Structures [chapter]

Dominik Sibbing, Hans-Christian Ebke, Kai Ingo Esser, Leif Kobbelt
2012 Lecture Notes in Computer Science  
We present a pipeline to generate high quality quad dominant meshes for vascular structures from a given volumetric image.  ...  topological information of the vascular structure.  ...  Besides this, a pure image based representation is often insufficient for subsequent processing.  ... 
doi:10.1007/978-3-642-33463-4_15 fatcat:elomtx26czdr3mw63h6aeza7fi

A coronary artery segmentation method based on multiscale analysis and region growing

Asma Kerkeni, Asma Benabdallah, Antoine Manzanera, Mohamed Hedi Bedoui
2016 Computerized Medical Imaging and Graphics  
Then an iterative multiscale search based on this criterion is performed. Selected points in each step are considered as seeds for the following step.  ...  Performing the process in a multiscale fashion helps extracting thin and peripheral vessels often missed by other segmentation methods.  ...  The rationale for this popularity is that these methods are based on a connectivity assumption, which is naturally suited to the case of the vascular trees [47, 48] .  ... 
doi:10.1016/j.compmedimag.2015.12.004 pmid:26748040 fatcat:woatomhkprczxp5jnsocqc2zgi

Computerized analysis of coronary artery disease: Performance evaluation of segmentation and tracking of coronary arteries in CT angiograms

Chuan Zhou, Heang-Ping Chan, Aamer Chughtai, Jean Kuriakose, Prachi Agarwal, Ella A. Kazerooni, Lubomir M. Hadjiiski, Smita Patel, Jun Wei
2014 Medical Physics (Lancaster)  
center points marked on the segment.  ...  For the 62 cases, the radiologists marked a total of 10191 center points on 865 visible coronary artery segments.  ...  FIG. 6 . 6 An example of radiologist-marked center points superimposed on the computer extracted vessels rendered in 3D volume. The center points are enlarged for display purpose.  ... 
doi:10.1118/1.4890294 pmid:25086543 pmcid:PMC4111838 fatcat:z5vk2kv25rh3rnzf3gsfgtfq4a

Computer-assisted Analysis of Three-dimensional MR Angiograms

Marcela Hernández-Hoyos, Maciej Orkisz, Philippe Puech, Catherine Mansard-Desbleds, Philippe Douek, Isabelle E. Magnin
2002 Radiographics  
This software combines the most commonly used three-dimensional visualization techniques with image processing methods for analysis of vascular morphology on MR angiograms.  ...  The software tools required for postprocessing of magnetic resonance (MR) angiograms include the following functions: data handling, image visualization, and vascular analysis.  ...  Acknowledgments: We thank Alfred Anwander for his help in implementing the algorithm for vessel contour extraction, Bruno Marchand for providing the phantom data sets, and Leonardo Florez for his great  ... 
doi:10.1148/radiographics.22.2.g02mr03421 pmid:11896231 fatcat:qbvaq3oufrapfepkktvwq4mwjy

Blood vessel segmentation methodologies in retinal images – A survey

M.M. Fraz, P. Remagnino, A. Hoppe, B. Uyyanonvara, A.R. Rudnicka, C.G. Owen, S.A. Barman
2012 Computer Methods and Programs in Biomedicine  
Moreover, the retinal vascular tree is found to be unique for each individual and can be used for biometric identification [11, 12] .  ...  Automatic generation of retinal maps and extraction of branch points have been used for temporal or multimodal image registration [8], retinal image mosaic synthesis [9], optic disk identification and  ...  The algorithm is evaluated for the completeness and correctness of the extracted vascular tree from angiograms obtained from seven patients.  ... 
doi:10.1016/j.cmpb.2012.03.009 pmid:22525589 fatcat:t6cjgne6rbckjlj7w7r4ptx6ui

A parallelized 4D reconstruction algorithm for vascular structures and motions based on energy optimization

Xinglong Liu, Fei Hou, Aimin Hao, Hong Qin
2014 The Visual Computer  
In this paper, we present a parallel 4D vessel reconstruction algorithm that simultaneously recovers 3D structure, shape, and motion based on multiple views of X-ray angiograms.  ...  We start with a fully parallelized algorithm to extract vessels as well as their skeletons and topologies from dynamic image sequences.  ...  After vessel extraction, extracted vessels are stored on GPU to be further processed for skeleton tracking. During tracking, each valid vessel point is mapped to one CUDA kernel.  ... 
doi:10.1007/s00371-014-1024-4 fatcat:l7vrlgdnbzd75boxjf557djxbi

Quantitative analysis of reconstructed 3-D coronary arterial tree and intracoronary devices

S.-Y.J. Chen, J.D. Carroll, J.C. Messenger
2002 IEEE Transactions on Medical Imaging  
With 2-D projection views that are acquired in this nonstandardized fashion, however, there is no way to know or estimate how much error occurs in the QCA process.  ...  Traditional quantitative coronary angiography is performed on two-dimensional (2-D) projection views. These views are chosen by the angiographer to minimize vessel overlap and foreshortening.  ...  They would also like to thank all the staff of the catheterization laboratory in providing the angiograms, reconstruction of coronary arterial trees, and preparation of this manuscript.  ... 
doi:10.1109/tmi.2002.801151 pmid:12374311 fatcat:4i77okkz3jfjjobtzxmnvy7yki

Analysis of fundus fluorescein angiogram based on the hessian matrix of directional curvelet sub-bands and distance regularized level set evolution

Hossein Rabbani, Asieh Soltanipour, Saeed Sadri, MohammadReza Akhlaghi
2015 Journal of Medical Signals & Sensors  
This paper presents a new procedure for automatic extraction of the blood vessels and optic disk (OD) in fundus fluorescein angiogram (FFA).  ...  For this purpose, each directional image is processed by using information of the first order derivative and eigenvalues obtained from the Hessian matrix.  ...  Medical Center Utrecht for making the DRIVE dataset publicly available.  ... 
doi:10.4103/2228-7477.161475 pmid:26284170 pmcid:PMC4528352 fatcat:hsbkhq6igrfxzlfzdw7twjtf5m

3D/2D Model-to-Image Registration Applied to TIPS Surgery [chapter]

Julien Jomier, Elizabeth Bullitt, Mark Van Horn, Chetna Pathak, Stephen R. Aylward
2006 Lecture Notes in Computer Science  
Registration optimization is driven by the intensity information from the projection pairs at sample points along the centerlines of the model.  ...  Our vascular registration method is used to intra-operatively initialize the alignment of a catheter and a preoperative vascular model in the context of image-guided TIPS (Transjugular, Intrahepatic, Portosystemic  ...  Then, a vessel extraction technique [8] is used to segment the main vascular tree.  ... 
doi:10.1007/11866763_81 fatcat:423ieegyevgmjgyoapqdfnbkqy
« Previous Showing results 1 — 15 out of 1,298 results