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Multi-angle acquisition and 3D composite reconstruction for organ-targeted PET using planar detectors.
Med Phys
December 2024
Department of Physics, Lakehead University, Thunder Bay, Ontario, Canada.
Background: This study investigates a multi-angle acquisition method aimed at improving image quality in organ-targeted PET detectors with planar detector heads. Organ-targeted PET technologies have emerged to address limitations of conventional whole-body PET/CT systems, such as restricted axial field-of-view (AFOV), limited spatial resolution, and high radiation exposure associated with PET procedures. The AFOV in organ-targeted PET can be adjusted to the organ of interest, minimizing unwanted signals from other parts of the body, thus improving signal collection efficiency and reducing the dose of administered radiotracer.
View Article and Find Full Text PDFPerceived intrinsic 3D shape of faces is robust to changes in lighting direction, image rotation and polarity inversion.
Vision Res
December 2024
University of Essex, Department of Psychology, Wivenhoe Park, Colchester, CO4 3SQ, Essex, UK; University of Suffolk, Institute of Health and Wellbeing, Ipswich, IP4 1QJ, Suffolk, UK.
Face recognition from 2D images is influenced by various factors, including lighting conditions, viewing direction, rotation, and polarity inversion. It has been proposed that these techniques affect face recognition by distorting shape from shading. This study investigates the perception of 3D face shape in 2D images using a gauge figure task.
View Article and Find Full Text PDFCoevolution of marine phytoplankton and Alteromonas bacteria in response to pCO2 and co-culture.
ISME J
December 2024
Department of Biology, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States.
As a result of human activity, Earth's atmosphere and climate are changing at an unprecedented pace. Models based on short-term experiments predict major changes will occur in marine phytoplankton communities in the future ocean, but rarely consider how evolution or interactions with other microbes may influence these changes. Here we experimentally evolved several phytoplankton in co-culture with a heterotrophic bacterium, Alteromonas sp.
View Article and Find Full Text PDFFunctional network disruption in cognitively unimpaired autosomal dominant Alzheimer's disease: a magnetoencephalography study.
Brain Commun
November 2024
Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC Location VUmc, 1081 HZ Amsterdam, The Netherlands.
Understanding the nature and onset of neurophysiological changes, and the selective vulnerability of central hub regions in the functional network, may aid in managing the growing impact of Alzheimer's disease on society. However, the precise neurophysiological alterations occurring in the pre-clinical stage of human Alzheimer's disease remain controversial. This study aims to provide increased insights on quantitative neurophysiological alterations during a true early stage of Alzheimer's disease.
View Article and Find Full Text PDFHigh-Brightness Color-Tunable AC-Driven Quantum Dot Light-Emitting Diodes for Integrated Passive High-Electric-Field Contactless Detection.
ACS Appl Mater Interfaces
December 2024
Institute of Optoelectronics Technology, Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Beijing 100044, China.
This work explores the carrier recombination dynamics of AC-driven quantum dot (QD) light-emitting diodes (AC-QLEDs) and proposes their application in the field of electric field contactless detection. Different sequences of green QD (GQD)/red QD (RQD) bilayer thin films as the emission layer of AC-QLEDs were fabricated via film transfer printing to ensure the complete morphology of each layer. AC-QLEDs with the emission layer as the sequence of GQD + RQD (GR-QLEDs) show a significantly enhanced carrier recombination efficiency due to its stable energy level structure, achieving the highest peak brightness ever recorded for vertically emitting brightness of 1648.
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