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Nyquist Ghost Elimination for Diffusion MRI by Dual-polarity Readout at Low b-values.
Biomed Phys Eng Express
January 2025
University of Gothenburg, Bruna stråket 13, Goteborg, 405 30, SWEDEN.
Dual-polarity readout is a simple and robust way to mitigate Nyquist ghosting in diffusion-weighted echo-planar imaging but imposes doubled scan time. We here propose how dual-polarity readout can be implemented with little or no increase in scan time by exploiting an observed b-value dependence and signal averaging. The b-value dependence was confirmed in healthy volunteers with distinct ghosting at low b-values but of negligible magnitude at b = 1000 s/mm2.
View Article and Find Full Text PDFPopulation encoding of observed and actual somatosensations in the human posterior parietal cortex.
Proc Natl Acad Sci U S A
January 2025
Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125.
Cognition relies on transforming sensory inputs into a generalizable understanding of the world. Mirror neurons have been proposed to underlie this process, mapping visual representations of others' actions and sensations onto neurons that mediate our own, providing a conduit for understanding. However, this theory has limitations.
View Article and Find Full Text PDFRepetitive and extensive focused ultrasound-mediated bilateral frontal blood-brain barrier opening for Alzheimer's disease.
J Neurosurg
January 2025
4Department of Neurosurgery, Korea University Anam Hospital, Seoul, Republic of Korea.
Objective: Focused ultrasound (FUS)-mediated blood-brain barrier (BBB) opening is safe and potentially beneficial in patients with Alzheimer's disease (AD) for the removal of amyloid-beta (Aβ) plaques. However, the optimal BBB opening intervals and number of treatment sessions for clinical improvement remain undefined. Therefore, the aim of this study was to evaluate the safety and benefits of repeated and more extensive BBB opening alone.
View Article and Find Full Text PDFRisk factors of short-term poor functional outcomes and long-term durability of ruptured large or giant intracranial aneurysms.
J Neurosurg
January 2025
13Department of Neurosurgery, Shimane Prefectural Central Hospital, Shimane, Japan.
Objective: Aneurysmal subarachnoid hemorrhage (SAH) is associated with high morbidity and mortality rates. In particular, functional outcomes of SAH caused by large or giant (≥ 10 mm) ruptured intracranial aneurysms are worsened by high procedure-related complication rates. However, studies describing the risk factors for poor functional outcomes specific to ruptured large/giant aneurysms are sparse.
View Article and Find Full Text PDFCorrection: Acceptability and Initial Adoption of the Heart Observation App for Infants With Congenital Heart Disease: Qualitative Study.
JMIR Form Res
January 2025
Department of Public Health Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway.
[This corrects the article DOI: 10.2196/45920.].
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