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Ecg-Gated C-Arm Computed Tomography Using L1 Regularization

Vincent Auvray, Loic Boussel, Philippe Douek, Michael Grass, Cyril Mory, Francoise Peyrin, Simon Rit, Dirk Schäfer, Bo Zhang
2012 Zenodo  
CONCLUSION We have presented and described in details a reconstruction algorithm designed for ECG-gated cardiac C-arm CT, and shown how replacing total variation by another regularization term can lead  ...  Regularization terms involve the L1 norm of the image in a basis where it is supposed to be sparse.  ... 
doi:10.5281/zenodo.52226 fatcat:jv7mlzis5fd73gjmrbsozchiyy

Total Variation Regularization Method for 3D Rotational Coronary Angiography [chapter]

Haibo Wu, Christopher Rohkohl, Joachim Hornegger
2011 Bildverarbeitung für die Medizin 2011  
To reduce the under-sampling artifacts, we apply an iterative method that makes use of total variation regularization.  ...  Due to the cardiac motion, only limited number of projections can be used to reconstruct coronary arteries for each heart phase, which makes the reconstruction problem ill-posed.  ...  The projection data for 3D reconstruction of the coronary arteries reconstruction is acquired on an X-ray C-arm system. Simultaneously, the electrocardiogram (ECG) is recorded.  ... 
doi:10.1007/978-3-642-19335-4_89 dblp:conf/bildmed/WuRH11 fatcat:grrojqu4hfbxlisvbk4ixpsgwe

ECG gated tomographic reconstruction for 3-D rotational coronary angiography

Yining Hu, Lizhe Xie, J C Nunes, J J Bellanger, M Bedossa, C Toumoulin
2010 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology  
Several regularizers are investigated L0-norm, L1 and L2 -norm in order to take into account the sparsity of the data.  ...  the 3 regularizer: L2, L1 and L0 norm.  ...  We present a modified version of an ECG gated statistic based iterative reconstruction method [3] .  ... 
doi:10.1109/iembs.2010.5627449 pmid:21096844 pmcid:PMC3017785 fatcat:yzvtpgyiezaedfwkvlhfg7ujo4

Removing streak artifacts from ECG-gated reconstructions using deconvolution

Cyril Mory, Vincent Auvray, Bo Zhang, Michael Grass, Dirk Schäfer, Simon Rit, Françoise Peyrin, Philippe Douek, Loïc Boussel
2014 Journal of X-Ray Science and Technology  
4D cardiac computed tomography aims at reconstructing the beating heart from a series of 2D projections and the simultaneously acquired electrocardiogram.  ...  The second one is an iterative deconvolution method, and turns out equivalent to an ECG-gated Iterative Filtered Back Projection (ECG-gated IFBP).  ...  -C-Arm CT settings: 300 projections of size 500*300 computed through a phantom that beats at 60 bpm. -The source trajectory covered 240 • in 10 s, which is close to a real C-Arm acquisition.  ... 
doi:10.3233/xst-140423 pmid:24699351 fatcat:m4wtpp237bhp3c3jm4bsrlhtq4

A blob-based tomographic reconstruction of 3D coronary trees from rotational x-ray angiography

Jian Zhou, Alexandre Bousse, Guanyu Yang, Jean-Jacques Bellanger, Limin Luo, Christine Toumoulin, Jean-Louis Coatrieux, Jiang Hsieh, Ehsan Samei
2008 Medical Imaging 2008: Physics of Medical Imaging  
It deals with multiple views extracted from a time-stamped image sequence through ECG gating.  ...  A Bayesian maximum a posteriori (MAP) estimation is used with a Poisson distributed projection data instead of the Gaussian approximation often used in tomography reconstruction.  ...  The imaging protocol used in this paper was adapted from the C-arm rotational X-ray coronary angiography Siemens AXIOM-Artis system.  ... 
doi:10.1117/12.769478 fatcat:mlkdyhe2crd57mppuid6z5ooz4

Lesion quantification and detection in myocardial 18F-FDG PET using edge-preserving priors and anatomical information from CT and MRI: a simulation study

Anna Turco, Johan Nuyts, Olivier Gheysens, Jürgen Duchenne, Jens-Uwe Voigt, Piet Claus, Kathleen Vunckx
2016 EJNMMI Physics  
In this work, we investigate and compare the regularizing effect of different anatomical and non-anatomical priors applied during maximum-a-posteriori (MAP) reconstruction of cardiac PET datasets.  ...  However, several concerns linked to the use of any kind of anatomical information for PVC on cardiac datasets arise.  ...  This corresponds to taking a single cardiac gate from an ECG-gated PET scan lasting 30 min using ten cardiac gates, for an equivalent scan duration of 180 s (instead of 36 s).  ... 
doi:10.1186/s40658-016-0145-4 pmid:27316644 pmcid:PMC4912507 fatcat:y3gxnevis5hubfe6azkaxxss5y

Reconstruction of coronary arteries from X-ray angiography: A review

Serkan Çimen, Ali Gooya, Michael Grass, Alejandro F. Frangi
2016 Medical Image Analysis  
To provide clinicians with 3D/3D+time information of coronary arteries, methods computing reconstructions of coronary arteries from X-ray angiography are required.  ...  Acknowledgements Serkan Ç imen holds a Ph.D. scholarship from the Department of Electronic and Electrical Engineering, The University of Sheffield, UK.  ...  Missing or unusable ECG (e.g. due to mislocation of electrodes), and irregular heartbeats pose further challenges for retrospective gating of images collected using a C-Arm system (Rohkohl et al., 2008b  ... 
doi:10.1016/j.media.2016.02.007 pmid:27054277 fatcat:vdk6373ndjdq7cnkytpckgubxe

Proceedings Of The 18Th International Conference On Biomedical Applications Of Electrical Impedance Tomography [article]

Alistair Boyle, Ryan Halter, Ethan Murphy, Andy Adler
2017 Zenodo  
Proceedings of the 18th International Conference on Biomedical Applications of ELECTRICAL IMPEDANCE TOMOGRAPHY Edited by Alistair Boyle, Ryan Halter, Ethan Murphy, Andy Adler June 21-24, 2017 Thayer School  ...  Engineering at Dartmouth, Hanover, New Hampshire, USA This document is the collection of papers accepted for presentation at the 18th International Conference on Biomedical Applications of Electrical Impedance Tomography  ...  Abstract: We investigated a new measurement modality by combining forced oscillation technique (FOT) and electrical impedance tomography (EIT).  ... 
doi:10.5281/zenodo.601555 fatcat:qhwameib6rd43krznqytsaeju4

Proceedings Of The 18Th International Conference On Biomedical Applications Of Electrical Impedance Tomography [article]

Alistair Boyle, Ryan Halter, Ethan Murphy, Andy Adler
2017 Zenodo  
Proceedings of the 18th International Conference on Biomedical Applications of ELECTRICAL IMPEDANCE TOMOGRAPHY Edited by Alistair Boyle, Ryan Halter, Ethan Murphy, Andy Adler June 21-24, 2017 Thayer School  ...  Engineering at Dartmouth, Hanover, New Hampshire, USA This document is the collection of papers accepted for presentation at the 18th International Conference on Biomedical Applications of Electrical Impedance Tomography  ...  Abstract: We investigated a new measurement modality by combining forced oscillation technique (FOT) and electrical impedance tomography (EIT).  ... 
doi:10.5281/zenodo.557093 fatcat:qn6cu4oazrefhmqgo6ykd4jxma

Towards Omni-Tomography—Grand Fusion of Multiple Modalities for Simultaneous Interior Tomography

Ge Wang, Jie Zhang, Hao Gao, Victor Weir, Hengyong Yu, Wenxiang Cong, Xiaochen Xu, Haiou Shen, James Bennett, Mark Furth, Yue Wang, Michael Vannier (+1 others)
2012 PLoS ONE  
We recently elevated interior tomography from its origin in computed tomography (CT) to a general tomographic principle, and proved its validity for other tomographic modalities including SPECT, MRI, and  ...  Over the past decade, two approaches have been used for multimodality fusion: Software based image registration and hybrid scanners such as PET-CT, PET-MRI, and SPECT-CT among others.  ...  To demonstrate the feasibility of interior CT, an ECG-gated CT scan was retrospectively selected on a GE Discovery CT750 HD scanner [41] .  ... 
doi:10.1371/journal.pone.0039700 pmid:22768108 pmcid:PMC3387257 fatcat:y3rybizkhjf4lkhxim6bycuiia

Proceedings of the 20th International Conference on Biomedical Applications of Electrical Impedance Tomography

Alistair Boyle, Kirill Aristovich, Anna Witkowska-Wrobel, David Holder
2019 Zenodo  
is the collection of papers accepted for presentation at the 20th International Conference on Biomedical Applications of Electrical Impedance Tomography.  ...  Proceedings of the 20th International Conference on Biomedical Applications of Electrical Impedance Tomography Edited by Alistair Boyle, Kirill Aristovich, Anna Witkowska-Wrobel and David Holder This document  ...  The regularization functionals B and C were isotropic TV regularization functionals.  ... 
doi:10.5281/zenodo.2691704 fatcat:bbqzgi2rz5hgreqgswujj6gv2q

Abstracts Of The 16 Th International Conference On Electrical Bio-Impedance And 17 Th International Conference On Electrical Impedance Tomography [article]

Stig Ollmar, Farhad Abtahi, Björn-Erik Erlandsson, Birgitta Janerot-Sjöberg, Kaj Lindecrantz, Mannan Mridha, Ingrid Nicander, Fernand Seoane, Heikki Teriö
2016 Zenodo  
16 th International Conference on Electrical Bio-Impedance (ICEBI) 17 th International Conference on Electrical Impedance Tomography (EIT) Stockholm 19–23 June 2016 Book of Abstracts  ...  A CO monitoring device is in development that uses a custom smartphone application, wearable electrical impedance tomography (EIT) system, and synchronous ECG and respiratory-gated triggering.  ...  Compared to standard sparse regularization (upper row of subfigure (c)), wavelet based regularization obtains smoother images (lower row of subfigure (c)).  ... 
doi:10.5281/zenodo.55753 fatcat:fh3blon7kfhonbepjfllnwqjbq

Full Issue PDF

2020 JACC Case Reports  
C o r o n a r y, P e r i p h e r a l , a n d S t r u c t u r a l I n t e r v e n t i o n s  ...  This diagnosis was confirmed using contrast-enhanced multislice computed tomography (Figure 4).  ...  FIGURE 2 2 Computed Tomography Angiography of Left Superior Vena Cava (A) Multiplanar reconstruction computed tomography (CT).  ... 
doi:10.1016/s2666-0849(20)30758-0 fatcat:4btfdp2oyjchtg74wvfad7njna

Five-minute whole-heart coronary MRA with sub-millimeter isotropic resolution, 100% respiratory scan efficiency, and 3D-PROST reconstruction

Aurélien Bustin, Giulia Ginami, Gastão Cruz, Teresa Correia, Tevfik F. Ismail, Imran Rashid, Radhouene Neji, René M. Botnar, Claudia Prieto
2018 Magnetic Resonance in Medicine  
step implemented in Matlab (v7.1, MathWorks, Natick, MA) and the 3D denoising step in C to reduce the computational time.  ...  The proposed 3D-PROST reconstruction was compared to iterative SENSE (itSENSE) (37) and a CS reconstruction with l1-wavelet regularization, proposed 3D-PROST reconstruction was evaluated for undersampling  ... 
doi:10.1002/mrm.27354 pmid:30058252 pmcid:PMC6617822 fatcat:cbdqxiwohnhmvargrgd3khlqne

Modelling the physics in the iterative reconstruction for transmission computed tomography

Johan Nuyts, Bruno De Man, Jeffrey A Fessler, Wojciech Zbijewski, Freek J Beekman
2013 Physics in Medicine and Biology  
Beta-blockers are commonly administered prior to cardiac CT to reduce the heart rate and make the heart beat more regular. ECG gating is used to select the cardiac phase with least motion.  ...  ECG gating can be prospective: only a particular phase is scanned, or retrospective: only a specific phase is used for reconstruction.  ... 
doi:10.1088/0031-9155/58/12/r63 pmid:23739261 pmcid:PMC3725149 fatcat:zz5j4yzcofethaovzqbec4oxii
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