196,421 research outputs found
The influence of the volumetric composition of the intracranial space on neural activity in healthy subjects: a resting-state functional magnetic resonance study
No full textBrain atrophy is a condition observed both with healthy aging and in association with neurologic pathological conditions. We investigated the role of the volumetric composition of the intracranial space (VOCICS) in terms of relative brain volume (BV%) and relative cerebrospinal fluid volume (CSFV%) on the neural activity measured by resting-state functional magnetic resonance imaging (rs-fMRI). We performed a group rs-fMRI analysis of a dataset of 192 healthy subjects derived by the publicly available Functional Connectome Project. Automatic volumetric analysis of structural data was performed in order to obtain BV% and CSFV% for every subject. Two fractional Amplitude of Low-Frequency Fluctuations (fALFF) and two region of interest-to-region of interest (ROI-to-ROI) analyses were then performed using BV% and CSFV% as second-level covariates, adopting a multiple regression statistic test in order to evaluate the effects of BV% and CSFV% on brain networks. The analyses revealed that VOCICS broadly influences brain networks. In conclusion, VOCICS significantly influences brain activity measured by rs-fMRI, and this parameter could represent an easy marker of brain connectivity in healthy young subjects
sj-docx-1-ine-10.1177_15910199231170411 - Supplemental material for Prediction of delayed cerebral ischemia after cerebral aneurysm rupture using explainable machine learning approach*
No full textSupplemental material, sj-docx-1-ine-10.1177_15910199231170411 for Prediction of delayed cerebral ischemia after cerebral aneurysm rupture using explainable machine learning approach* by Reza M Taghavi, Guangming Zhu, Max Wintermark, Gabriella M Kuraitis, Eric S Sussman, Benjamin Pulli, Brook Biniam, Sophie Ostmeier and
Gary K Steinberg, Jeremy J Heit in Interventional Neuroradiology</p
Variation of degree of stenosis quantification using different energy level with dual energy CT scanner
No full textPurpose: To investigate the variation in the quantification of the carotid degree of stenosis (DoS) with a dual energy computed tomography (CT), using different energy levels during the image reconstruction. Methods: In this retrospective study, 53 subjects (37 males; mean age 67 ± 11 years; age range 47–83 years) studied with a multi-energy CT scanner were included. Datasets were reconstructed on a dedicated workstation and from the CT raw data multiple datasets were generated at the following monochromatic energy levels: 66, 70, 77, and 86 kilo-electronvolt (keV). Two radiologists independently performed all measurements for quantification of the degree of stenosis. Wilcoxon test was used to test the differences between the Hounsifield unit (HU) values in the plaques at different keV. Results: The Wilcoxon analysis showed a statistically significant difference (p = 0.001) in the DoS assessment among the different keVs selected. The Bland-Altman analysis showed that the DoS difference had a linear relation with the keV difference (the bigger is the difference in keV, the bigger is the variation in DoS) and that for different keVs, the difference in DoS is reduced with its increase. Conclusion: A standardization in the use of the energy level during the image reconstruction should be considered
White-matter hyperintensities in patients with carotid artery stenosis: An exploratory connectometry study
No full textBackground: White-matter lesions (WMLs) are frequently found in magnetic resonance imaging (MRi), and the WML load tends to be higher in patients affected by cervical internal carotid artery (cICA) stenosis. Purpose: This study aimed to investigate whether and how WMLs influence cerebral networking in patients with asymptomatic cICA stenosis eligible for carotid endarterectomy (CEA) by exploiting the connectometry technique. Methods: The study was designed as a cross-sectional exploratory investigation, and 28 patients with cICA stenosis eligible for CEA were enrolled. All patients received an MRI scan, including a T1-weighted, a FLAIR and a diffusion-weighted (DW) sequence. The T1 and FLAIR sequences were analysed for quantification of WML burden (WMLB) and total number of WMLs (TNWMLs). The DW data were reconstructed in the MNI space using q-space diffeomorphic reconstruction, and were grouped to create a connectometry database. The connectometry analysis evaluated the influence of both the WMLB and TNWMLs to local connectivity in a multiple regression model that included age, WMLB and TNWMLs, adopting three different T-score thresholds (1, 2 and 3). A p-value corrected for false discovery rate of <0.05 was adopted as a threshold to identify statistically significant results. Results: The connectometry analysis identified several white-matter bundles negatively correlated with WMLB; no statistically significant correlation was found for TNWMLs. Conclusion: Results of our study suggest that WMLs influence brain connectivity measured by the connectometry technique in patients with cICA stenosis eligible for CEA. Further studies are warranted to understand the role of WMLs better as a marker of disease in patients with cICA stenosis
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Supplemental Material - Comparing blood biomarkers to clinical decision rules to select patients suspected of traumatic brain injury for head computed tomography
No full textSupplemental Material for Comparing blood biomarkers to clinical decision rules to select patients suspected of traumatic brain injury for head computed tomography by Ying Li, Victoria Y Ding, Hui Chen, Guangming Zhu, Bin Jiang, Derek Boothroyd, Paymon G Rezaii, Anthony M Bet, Amy D Paulino, Art Weber, Olena Y Glushakova, Ronald L Hayes, and Max Wintermark in The Neuroradiology Journal.</p
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