Results 71 to 80 of about 209,944 (308)

Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain

Advanced Materials, EarlyView.
A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha, Bilguun Nurzed, Mostafa Berangi, Andre Kuehne, Helmar Waiczies, Igor Fabian Tellez Ceja, Xiang Hu, Thomas Gladytz, Lisa Krenz, Dave Huebler, Beate Endemann, Claudia Brockmann, Ebba Beller, Oliver Stachs, Thoralf Niendorf   +14 more
wiley   +1 more source

A novel, hands-free ultrasound patch for continuous monitoring of quantitative Doppler in the carotid artery

Scientific Reports, 2021
Quantitative Doppler ultrasound of the carotid artery has been proposed as an instantaneous surrogate for monitoring rapid changes in left ventricular output. Tracking immediate changes in the arterial Doppler spectrogram has value in acute care settings
Jon-Émile S. Kenny, Chelsea E. Munding, Joseph K. Eibl, Andrew M. Eibl, Bradley F. Long, Aaron Boyes, Jianhua Yin, Pietro Verrecchia, Matthew Parrotta, Ronald Gatzke, Paul A. Magnin, Peter N. Burns, F. Stuart Foster, Christine E. M. Demore   +13 more
doaj   +1 more source

One year in review: ultrasound in arthritis [PDF]

, 2016
Musculoskeletal ultrasound (MSUS) has become a relevant part of rheumatology practice and research because it substantially allows us to optimize management of rheumatic and musculoskeletal diseases. This non-invasive imaging modality is a valuable point-
IAGNOCCO, Annamaria, Naredo, Esperanza
core  

Acute fetal anemia diagnosed by middle cerebral artery Doppler velocimetry in stage v twin-twin transfusion syndrome. [PDF]

, 2011
In stage V twin-twin transfusion syndrome (TTTS), up to 50% of surviving twins die or experience permanent disabilities, likely due to acute intertwin hemorrhage resulting in sudden severe anemia of the survivor.
Friedrich, Esther, Porto, Manuel, Salcedo, Jennifer, Wing, Deborah A   +3 more
core   +2 more sources

Doppler ultrasound evaluation in preeclampsia [PDF]

BMC Research Notes, 2013
Abstract Background Worldwide preeclampsia (PE) is the leading cause of maternal death and affects 5 to 8% of pregnant women. PE is characterized by elevated blood pressure and proteinuria. Doppler Ultrasound (US) evaluation has been considered a useful method for prediction of PE; however, there is no complete data ...
Maria A Lopez-Mendez, Victoria Martínez-Gaytán, Raúl Cortés-Flores, René Ramos-González, Mauro Ochoa-Torres, Idalia Garza‐Veloz, Mónica Martínez-Acuña, Jose Isaias Badillo-Almaraz, Margarita L. Martínez‐Fierro   +8 more
openaire   +2 more sources

Characterization of Droplet Formation in Ultrasonic Spray Coating: Influence of Ink Formulation Using Phase Doppler Anemometry and Machine Learning

Advanced Materials Technologies, EarlyView.
This study explores how machine learning models, trained on small experimental datasets obtained via Phase Doppler Anemometry (PDA), can accurately predict droplet size (D32) in ultrasonic spray coating (USSC). By capturing the influence of ink complexity (solvent, polymer, nanoparticles), power, and flow rate, the model enables precise droplet control
Pieter Verding, Danny E. P. Vanpoucke, Yunus T. Aksoy, Tobias Corthouts, Maria R. Vetrano, Wim Deferme   +5 more
wiley   +1 more source

3D‐Printed Dynamic Heart Model With Left‐Side Anatomy and Integrated Sensor for Edge‐to‐Edge Repair and Regurgitation Reduction

Advanced Materials Technologies, EarlyView.
This work presents a fully synthetic, 3D‐printed dynamic heart model with left‐side anatomy featuring sutured mitral valve chordae tendineae analogs, embedded actuators for physiologic wall contraction, and customized flexible pressure sensors for the left ventricle.
Alejandro Guillen Obando, Hongyi Shen, Myles McGovern, Yusen Zhang, Vivien Lin, Darryl Fu, Ryan Baumwart, Kaiyan Qiu   +7 more
wiley   +1 more source

Physical Examination Of Arteriovenous Fistula: A Basic Approach In AV Fistula Stenosis Detection

Journal of Bahria University Medical and Dental College, 2013
Objectives: To determine the accuracy and equivalence of physical examination, MDCTA and Doppler ultrasound in detection of arteriovenous fistula (AVF) stenosis. Materials and Methods: We conducted a pilot study in hemodialysis department of PNS Shifa
Aisha Bibi, Sohail Sabir, Irfanul Haq
doaj  

Use of Doppler Ultrasound in Perinatal Care: Maternal and Neonatal Care

Journal of Education, Health and Sport
Introduction and purpose Doppler ultrasound has become a milestone in monitoring maternal and fetal health, offering critical information about blood flow in the placenta, umbilical cord, and fetal organs.
Karolina Zalewa, Joanna Olszak, Marta Kaus, Dominika Orłowska, Lidia Bartoszek, Mikołaj Poleszczuk, Karol Poleszczuk, Anna Czuba, Alicja Milewska, Natalia Klepacz   +9 more
doaj   +1 more source

Discrimination between pleural thickening and minimal pleural effusion using color Doppler chest ultrasonography

Egyptian Journal of Chest Disease and Tuberculosis, 2013
Background: The discrimination of pleural thickening from minimal pleural effusion may be difficult as both lesions appear as anechoic on grayscale ultrasound, hence, free of “echoes” does not confirm the presence of pleural fluid.
Ali A. Hasan, Hoda A. Makhlouf, Alaa R.M. Mohamed   +2 more
doaj   +1 more source