Results 171 to 180 of about 103,955 (369)

Evaluation of Real‐Time Cardiovascular Flow MRI Using Compressed Sensing in a Phantom and in Patients With Valvular Disease or Arrhythmia

Journal of Magnetic Resonance Imaging, EarlyView.
Background Real‐time (RT) phase contrast (PC) flow MRI can potentially be used to measure blood flow in arrhythmic patients. Undersampled RT PC has been combined with online compressed sensing (CS) reconstruction (CS RT) enabling clinical use. However, CS RT flow has not been validated in a clinical setting.
Tania Lala, Lea Christierson, Petter Frieberg, Daniel Giese, Peter Kellman, Nina Hakacova, Pia Sjöberg, Ellen Ostenfeld, Johannes Töger   +8 more
wiley   +1 more source

MDCT evaluation of dynamic changes in aortic root parameters during the cardiac cycle in patients with aortic regurgitation

Scientific Reports
Objectives: To investigate the dynamic changes in multiple planes and parameters of the aortic root region at different phases of the cardiac cycle in patients with aortic regurgitation (AR) using multi-detector row computed tomography (MDCT). To provide
Shuai Zhang, Ting Huang, Yun Lu, Xi Guo, Quanliang Shang   +4 more
doaj   +1 more source

OBSERVATIONS ON THE CHANGE OF VENTRICULAR SYSTOLE (QT INTERVAL) DURING EXERCISE 1 [PDF]

, 1950
Paul N. Yu, Robert A. Bruce, Frank W. Lovejoy, R. S. B. Pearson   +3 more
openalex   +1 more source

Effect of Body Position on Dynamic Apparent Diffusion Coefficient Changes During the Cardiac Cycle in the Human Brain

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Dynamic changes in the apparent diffusion coefficient (ΔADC) during the cardiac cycle reflect water molecule fluctuations in the brain and intracranial conditions. While body position strongly affects intracranial conditions, the relationship between ΔADC and body position has been less explored, as conventional MRI is typically ...
Naoki Ohno, Tosiaki Miyati, Masatomo Uehara, Riho Okamoto, Mitsuhito Mase, Satoshi Kobayashi   +5 more
wiley   +1 more source

Deep learning framework for interpretable quality control of echocardiography video

Medical Physics, EarlyView.
Abstract Background Echocardiography (echo) has become an indispensable tool in modern cardiology, offering real‐time imaging that helps clinicians evaluate heart function and identify abnormalities. Despite these advantages, the acquisition of high‐quality echo is time‐consuming, labor‐intensive, and highly subjective.
Liwei Du, Wufeng Xue, Zhanru Qi, Zhongqing Shi, Guanjun Guo, Xin Yang, Dong Ni, Jing Yao   +7 more
wiley   +1 more source

Normal ultrasound measurements of atria and heart ventricles of 25–64 years old people

Сеченовский вестник, 2022
This article presents the results of research of the ultrasound dimensions of the atria and heart ventricles in 80 healthy subjects reached by using an ultrasonic machine SSD-630 (the company ≪Aloka≫, Japan).
A. K. Shadmanov, I. K. Kasym-Hodzhaev, D. A. Iminova, A. Abdullaev, D. I. Kurbanova   +4 more
doaj  

Aortic velocity measurements derived from phase-contrast MRI are influenced by a cardiac implantable electronic device in both adult and pediatric human subjects. [PDF]

Magn Reson Med
Abstract Purpose Overall there is a lack of evidence on the accuracy and precision of phase‐contrast (PC) MRI in patients with cardiac implantable electronic devices (CIEDs). The purpose of this study is to determine whether aortic velocity measurements are influenced by a CIED.
Yang H, Aboyewa OB, Webster G, Shah D, Golestanirad L, Baraboo JJ, Markl M, Collins JD, Knight BP, Hong K, Patel AR, Lee DC, Kim D.   +12 more
europepmc   +2 more sources

TagGen: Diffusion‐based generative model for cardiac MR tagging super resolution

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose The aim of the work is to develop a cascaded diffusion‐based super‐resolution model for low‐resolution (LR) MR tagging acquisitions, which is integrated with parallel imaging to achieve highly accelerated MR tagging while enhancing the tag grid quality of low‐resolution images.
Changyu Sun, Cody Thornburgh, Yu Wang, Senthil Kumar, Talissa A. Altes   +4 more
wiley   +1 more source

Systolic geometry and regularization technique [PDF]

arXiv, 2015
The aim of this text is to present the concept of systole of a compact riemannian manifold and to give an overview of systolic geometry. I will also present the "regularization technique", which leads to major results in systolic geometry. I will detail how this technique allows to link the systolic volume of some closed riemannian manifolds to ...
arxiv  

Improving ungated steady‐state cardiac perfusion using transition bands

Magnetic Resonance in Medicine, EarlyView.
Abstract Purpose Although gated first‐pass contrast‐enhanced sequences are the clinical standard for cardiovascular MR perfusion, some patient conditions necessitate using ungated steady‐state sequences. However, through‐plane cardiac motion and blood flow into the left ventricle can disrupt the magnetization steady state of the tissue, and perfusion ...
Jason K. Mendes, Johnathan V. Le, Andrew E. Arai, Ravi Ranjan, Edward V. R. DiBella, Ganesh Adluru   +5 more
wiley   +1 more source