Results 141 to 150 of about 112,515 (371)

Multi‐Frame Image Registration for Automated Ventricular Function Assessment in Single Breath‐Hold Cine MRI Using Limited Labels

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose This study aims to develop an automated framework for operator‐independent assessment of cardiac ventricular function from highly accelerated images. Methods We introduce a deep learning framework that generates reliable ventricular volumetric parameters and strain measures from fully sampled and retrospectively accelerated MR images ...
Aya Ghoul, Paxstan Cassal Paulson, Andreas Lingg, Patrick Krumm, Kerstin Hammernik, Daniel Rueckert, Sergios Gatidis, Thomas Küstner   +7 more
wiley   +1 more source

Personalized auricular vagus nerve stimulation: beat-to-beat deceleration dominates in systole-gated stimulation during inspiration - a pilot study

Frontiers in Physiology
Neuromodulation comes into focus as a non-pharmacological therapy with the vagus nerve as modulation target. The auricular vagus nerve stimulation (aVNS) has emerged to treat chronic diseases while re-establishing the sympathovagal balance and activating
Johannes Tischer, Jozsef Constantin Szeles, Eugenijus Kaniusas   +2 more
doaj   +1 more source

Asymptotic properties of the set of systoles of arithmetic Riemann surfaces [PDF]

, 2017
Cayo Dória
openalex   +1 more source

Versatile and Highly Efficient MRI Simulation of Arbitrary Motion in KomaMRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To extend the KomaMRI simulator with motion capabilities that enable the simulation of both simple, parametrizable motion patterns and arbitrarily complex spin trajectories. Additionally, we introduce a novel file format for storing and sharing dynamic digital phantoms.
Pablo Villacorta‐Aylagas, Carlos Andrés Castillo‐Passi, Ryan Anders Kierulf, Rosa María Menchón‐Lara, Justino R. Rodríguez‐Galván, José Benito Sierra‐Pallares, Pablo Irarrazaval, Carlos Alberola‐López   +7 more
wiley   +1 more source

Coronary Artery Blood Flow Imaging Using 3D Flow MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose In this work, a 3D phase contrast (PC) technique is presented, which enables flow velocity measurements in three spatial directions, simultaneously covering the proximal left (LCA) and right (RCA) coronary arteries and yielding both morphological and flow information.
Denise Lichthardt, Michaela Schmidt, Jens Wetzl, Peter Speier, Manuel Hein, Christopher Schuppert, Armin M. Nagel, Daniel Giese   +7 more
wiley   +1 more source

Free‐Breathing Multi‐Slice Co‐Registered Cardiac T1, T2, and ADC Mapping With Spin‐Echo Echo Planar Imaging

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a free‐breathing method for multi‐slice co‐registered cardiac T1, T2, and ADC maps using single‐shot spin‐echo echo planar imaging (SE‐EPI). Methods T1, T2, and diffusion weighted images in five slices were acquired with SE‐EPI readouts during free breathing using interleaved acquisition of slices, non‐selective inversion ...
Dingheng Mai, Danielle Kara, Yuchi Liu, Tassia R. S. Moura, Mehdi Sadighi, Fayez Kanj, Emma Wexler, David Sosnovik, Mazen Hanna, Pasquale Santangeli, Hiroshi Nakagawa, Oussama Wazni, David Chen, W. H. Wilson Tang, Animesh Tandon, Deborah Kwon, Christopher Nguyen   +16 more
wiley   +1 more source

The Effect of Voxel Volume and Voxel Shape on Cardiac Diffusion Tensor Imaging Metrics

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Cardiac diffusion tensor imaging (cDTI) is signal‐to‐noise ratio (SNR)‐limited due to diffusion signal attenuation, long echo times from gradient moment nulling, and moderate myocardial T2$$ {}_2 $$. Increasing voxel volume improves SNR but reduces spatial sensitivity and introduces physiological bias.
Ariel J. Hannum, Tyler E. Cork, Kawin Setsompop, Daniel B. Ennis   +3 more
wiley   +1 more source

Altered sense of agency in schizophrenia: the aberrant effect of cardiac interoceptive signals

Frontiers in Psychiatry
BackgroundSchizophrenia (SZ) is characterized by abnormalities in self-representation, including a disturbed sense of agency (SoA). The continuous processing of sensory information concerning the internal state of the body (interoception) is argued to be
Akihiro Koreki, Akihiro Koreki, Akihiro Koreki, Yuri Terasawa, Atsuo Nuruki, Hiroki Oi, Hugo Critchley, Mahinda Yogarajah, Mitsumoto Onaya   +8 more
doaj   +1 more source

Feasibility Study for Dual Phase Free Breathing 3D bSSFP MRA With Preserved Eddy‐Current Tolerance With Adaptive k‐Space Lengths (PETAL) Acquisition

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To demonstrate the feasibility of a novel dual‐phase self‐navigated, free‐breathing balanced steady‐state free‐precession whole‐heart MRA acquisition for aortic annulus size measurement using a Cartesian trajectory that mitigates eddy‐current artifacts by minimizing k‐space jumps between consecutive readouts with predictable scan times.
Tassia Ribeiro Salles Moura, Dingheng Mai, Emma Wexler, Lydia P. Lewis, Wajeh Abuirmaileh, Angel Houston, Kathy Kohut, Eric Roselli, Deborah Kwon, David Chen, Danielle Kara, Christopher T. Nguyen   +11 more
wiley   +1 more source

AURICULAR PREMATURE SYSTOLES: THE DURATION OF THE ELECTRICAL SYSTOLE [PDF]

Heart, 1946
openaire   +3 more sources