Results 181 to 190 of about 74,974 (232)

Validation of Intravoxel Incoherent Motion MRI Using Perfused Explanted Human Livers

open access: yesMagnetic Resonance in Medicine, Volume 95, Issue 4, Page 2291-2304, April 2026.
ABSTRACT Purpose Evaluate the feasibility of using perfused explanted human livers for validating intravoxel incoherent motion (IVIM). Methods Eight (n = 8) explanted livers from deceased donors were obtained. The portal vein and hepatic artery of each explanted liver were connected to a perfusion system.
Gregory Simchick   +6 more
wiley   +1 more source

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

open access: yesMagnetic Resonance in Medicine, Volume 95, Issue 4, Page 2063-2077, April 2026.
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 T 2$$ {}_2 $$. Increasing voxel volume improves SNR but reduces spatial sensitivity and introduces physiological bias.
Ariel J. Hannum   +3 more
wiley   +1 more source

Nanoscale Graphene‐Based Ballistic Rectifiers for Detection of High Terahertz Frequency Optical Signals

open access: yesSmall Science, Volume 6, Issue 4, April 2026.
Ballistic graphene rectifier capable of operating at frequencies up to 3 THz, engineered through asymmetric nanojunction geometries in high‐mobility monolayer graphene encapsulated in hexagonal boron nitride Graphene exhibits the longest carrier mean free path of any known electronic material, yet only a few device concepts have successfully leveraged ...
Lili Shi   +4 more
wiley   +1 more source

ULF Wave Modulation of Energetic Electron Precipitation Caused by the Self‐Limiting of Space Radiation: May 2024 Superstorm Observations

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The May 2024 geomagnetic superstorm provided the opportunity to explore how strong wave‐particle interactions affect energetic electron precipitation under intense driving. Using coordinated measurements from a balloon‐borne Timepix‐based X‐ray detector, ground‐based riometers and magnetometers, and Arase satellite observations, we identified ...
L. Olifer   +22 more
wiley   +1 more source

Monitoring Groundwater Pumping Using Time‐Lapse Tomography From Ambient Seismic Noise

open access: yesWater Resources Research, Volume 62, Issue 4, April 2026.
Abstract Management of water resources will be of critical importance as the effects of climate change accelerate. This implies the need to monitor water resources with high spatial and temporal resolution. One way to meet this need could be passive seismic methods using ambient seismic noise. In this study, we present a novel approach using time‐lapse
Richard Kramer   +5 more
wiley   +1 more source

A remotely operated blood sampling and sedative administration device in freely moving pinnipeds

open access: yesMethods in Ecology and Evolution, Volume 17, Issue 4, Page 1175-1187, April 2026.
Abstract A remotely operated device for use with freely moving pinnipeds was designed and successfully developed for the collection of blood samples and the administration of sedatives via an indwelling, venous catheter. The performance of the sampler, called the ‘Mossquito’, was demonstrated on six wild caught, young‐of‐the‐year grey seals ...
Joanna L. Kershaw   +10 more
wiley   +1 more source

Corticospinal, reticulospinal and motoneuronal contributions to fatigability during a sustained contraction of the elbow flexors

open access: yesExperimental Physiology, Volume 111, Issue 4, Page 2190-2199, 1 April 2026.
Abstract Synaptic input to the motoneuron pool is altered during fatiguing muscle contractions. In humans, the corticospinal tract is often studied, with equivocal findings regarding its role in the reduction of force. To date, the involvement of the reticulospinal tract during states of fatigue has not been explored.
Oliver Hayman   +8 more
wiley   +1 more source

Phase angle, impedance ratio, and athletic performance of young adult Japanese track and field throwers

open access: yesPhysiological Reports, Volume 14, Issue 7, April 2026.
Abstract This study investigated the relationship between World Athletics (WA) points and body size, body composition, phase angle (PhA), and impedance ratio (IR) among young adult Japanese university track and field throwing athletes. Twenty‐five female and 39 male athletes (11 and 14 javelin throwers, 5 and 13 discus throwers, 6 and 7 hammer throwers,
Akihisa Hikita   +3 more
wiley   +1 more source

Changes in the mechanical properties of tendon structures in lower limbs during repetitive contractions in male long‐distance runners

open access: yesPhysiological Reports, Volume 14, Issue 7, April 2026.
Abstract The purposes of this study were to compare mechanical properties of tendon structures during single and repetitive contractions between long‐distance runners (LDR) and untrained males (UTM) and to verify the relationship between changes in mechanical properties of tendon structures during repetitive contractions and running performance in LDR.
Shuhei Sasajima   +3 more
wiley   +1 more source

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