Browsing by Author "Nezafat, Reza"
Now showing items 1-20 of 24
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Accelerated Cardiovascular Magnetic Resonance Imaging Using Radial Acquisition with Compressed Sensing
Nam, Seung Hoon (2012-12-13)Magnetic resonance imaging (MRI) is a medical imaging technique that can visualize internal organs for examination and diagnosis. It is non-invasive and ionizing radiation-free, and provides good contrast between different ... -
Accelerated free breathing ECG triggered contrast enhanced pulmonary vein magnetic resonance angiography using compressed sensing
Roujol, Sébastien; Foppa, Murilo; Basha, Tamer A; Akçakaya, Mehmet; Kissinger, Kraig V; Goddu, Beth; Berg, Sophie; Nezafat, Reza (BioMed Central, 2014)Background: To investigate the feasibility of accelerated electrocardiogram (ECG)-triggered contrast enhanced pulmonary vein magnetic resonance angiography (CE-PV MRA) with isotropic spatial resolution using compressed ... -
Accelerated three-dimensional free-breathing first pass cardiac perfusion at 1.5T
Akcakaya, Mehmet; Basha, Tamer; Foppa, Murilo; Kissinger, Kraig V; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2013) -
An Augmented Lagrangian Based Compressed Sensing Reconstruction for Non-Cartesian Magnetic Resonance Imaging without Gridding and Regridding at Every Iteration
Akçakaya, Mehmet; Nam, Seunghoon; Basha, Tamer A.; Kawaji, Keigo; Tarokh, Vahid; Nezafat, Reza (Public Library of Science, 2014)Background: Non-Cartesian trajectories are used in a variety of fast imaging applications, due to the incoherent image domain artifacts they create when undersampled. While the gridding technique is commonly utilized for ... -
Characterization of Respiratory and Cardiac Motion from Electro-Anatomical Mapping Data for Improved Fusion of MRI to Left Ventricular Electrograms
Roujol, Sébastien; Anter, Elad; Josephson, Mark E.; Nezafat, Reza (Public Library of Science, 2013)Accurate fusion of late gadolinium enhancement magnetic resonance imaging (MRI) and electro-anatomical voltage mapping (EAM) is required to evaluate the potential of MRI to identify the substrate of ventricular tachycardia. ... -
Comparison of respiratory navigator techniques for interleaved high-resolution coronary vessel wall imaging
Akcakaya, Mehmet; Henningsson, Markus; Nezafat, Reza; Botnar, Rene M (BioMed Central, 2013) -
Feasibility of real time integration of high-resolution scar images with invasive electrograms in electro-anatomical mapping system in patients undergoing ventricular tachycardia ablation
Roujol, Sebastien; Basha, Tamer; Tan, Alex Y; Anter, Elad; Buxton, Alfred E; Josephson, Mark; Nezafat, Reza (BioMed Central, 2013) -
Free-Breathing Late Gadolinium Enhancement CMR with a Fixed Short Scan Time Using CosMo
Moghari, Mehdi H.; Rayatzadeh, Hussein; Hong, Susie; Chan, Raymond H.; Akcakaya, Mehmet; Goddu, Beth; Goepfert, Lois A; Kissinger, Kraig V; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2012)To evaluate the performance of compressed sensing for motion correction (CosMo) [1] in compensating the respiratory motion of the heart in 3D late gadolinium enhancement (LGE) CMR. -
Heart-rate independent myocardial T1-mapping using combined saturation and inversion preparation pulses
Weingärtner, Sebastian; Akcakaya, Mehmet; Berg, Sophie; Kissinger, Kraig V; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2013) -
Highly conductive, stretchable and biocompatible Ag–Au core–sheath nanowire composite for wearable and implantable bioelectronics
Choi, Suji; Han, Sang Ihn; Jung, Dongjun; Hwang, Hye Jin; Lim, Chaehong; Bae, Soochan; Park, Ok Kyu; Tschabrunn, Cory M.; Lee, Mincheol; Bae, Sun Youn; Yu, Ji Woong; Ryu, Ji Ho; Lee, Sang-Woo; Park, Kyungpyo; Kang, Peter; Lee, Won Bo; Nezafat, Reza; Hyeon, Taeghwan; Kim, Dae-Hyeong (Springer Science and Business Media LLC, 2018-08-13)Wearable and implantable devices require conductive, stretchable and biocompatible materials. However, obtaining composites that simultaneously fulfil these requirements is challenging due to a trade-off between conductivity ... -
Impact of motion correction on reproducibility and spatial variability of quantitative myocardial T2 mapping
Roujol, Sébastien; Basha, Tamer A.; Weingärtner, Sebastian; Akçakaya, Mehmet; Berg, Sophie; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2015)Background: To evaluate and quantify the impact of a novel image-based motion correction technique in myocardial T2 mapping in terms of measurement reproducibility and spatial variability. Methods: Twelve healthy adult ... -
Improved 3D late gadolinium enhancement MRI for patients with arrhythmia or heart rate variability
Weingärtner, Sebastian; Akcakaya, Mehmet; Berg, Sophie; Kissinger, Kraig V; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2013) -
Improved accelerated breath-hold radial cine image reconstruction by acquiring additional free-breathing data between breath-holds
Nam, Seunghoon; Akcakaya, Mehmet; Kwak, Yongjun; Goddu, Beth; Kissinger, Kraig V; Manning, Warren J.; Tarokh, Vahid; Nezafat, Reza (BioMed Central, 2012) -
Improved Data Acquisition Efficiency for Respiratory Motion Correction in Coronary MRI
Moghari, Mehdi H.; Roujol, Sébastien; Henningsson, Markus; Chan, Raymond Ho Ming; Hong, Susie; Goddu, Beth; Goepfert, Lois A; Kissinger, Kraig V; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2012)To investigate the performance of a novel algorithm for correcting respiratory-induced heart motion for whole-heart coronary MRI. -
Improved efficiency for respiratory motion compensation in three-dimensional flow measurements
Akcakaya, Mehmet; Gulaka, Praveen; Basha, Tamer; Hauser, Thomas Henry; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2013) -
Improved Fat Water Separation with Water Selective Inversion Pulse for Inversion Recovery-based Cardiac MRI Sequence
Havla, Lukas; Basha, Tamer A; Rayatzadeh, Hussein; Shaw, Jaime L; Manning, Warren J.; Reeder, Scott B; Kozerke, Sebastian; Nezafat, Reza (BioMed Central, 2012) -
Improved Late Gadolinium Enhancement Imaging of Left Ventricle with Isotropic Spatial Resolution
Akcakaya, Mehmet; Rayatzadeh, Hussein; Hong, Susie; Hauser, Thomas Henry; Chan, Raymond Ho Ming; Basha, Tamer; Kissinger, Kraig V; Goddu, Beth; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2012) -
Improved Navigator-Gated Motion Compensation in Cardiac MR Using Additional Constraint of Magnitude of Motion-Corrupted Data
Shaw, Jaime L; Moghari, Mehdi H.; Akcakaya, Mehmet; Chan, Raymond Ho Ming; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2012)Background. In conventional prospective respiratory navigator (NAV) acquisitions, 40-60% of the acquired data are discarded resulting in low efficiency and long scan times [1,2].Compressed-sensing Motion Compensation (CosMo) ... -
Left Atrial Scar Assessment Using Imaging With Isotropic Spatial Resolution and Compressed Sensing
Akcakaya, Mehmet; Hong, Susie; Chan, Raymond Ho Ming; Basha, Tamer; Moghari, Mehdi H.; Kissinger, Kraig V; Goddu, Beth; Josephson, Mark; Manning, Warren J.; Nezafat, Reza (BioMed Central, 2012)Summary. We assess left atrial scar using late gadolinium enhancement (LGE) with isotropic spatial resolution of \(1.4^3 mm^3\) by using highly accelerated LOST [1] reconstruction. Background. Atrial fibrillation (AF) is ... -
A medical device-grade T1 and ECV phantom for global T1 mapping quality assurance—the T1 Mapping and ECV Standardization in cardiovascular magnetic resonance (T1MES) program
Captur, Gabriella; Gatehouse, Peter; Keenan, Kathryn E.; Heslinga, Friso G.; Bruehl, Ruediger; Prothmann, Marcel; Graves, Martin J.; Eames, Richard J.; Torlasco, Camilla; Benedetti, Giulia; Donovan, Jacqueline; Ittermann, Bernd; Boubertakh, Redha; Bathgate, Andrew; Royet, Celine; Pang, Wenjie; Nezafat, Reza; Salerno, Michael; Kellman, Peter; Moon, James C. (BioMed Central, 2016)Background: T1 mapping and extracellular volume (ECV) have the potential to guide patient care and serve as surrogate end-points in clinical trials, but measurements differ between cardiovascular magnetic resonance (CMR) ...