Spatial and temporal joint, partially-joint and individual sources in independent component analysis: Application to social brain fMRI dataset

ConclusionsExtracting temporal and spatial joint and partially-joint sources in a unified algorithm improves the accuracy of joint analysis of the multi-subject fMRI dataset.
Source: Journal of Neuroscience Methods - Category: Neuroscience Source Type: research

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Authors: Farhat NS, Theiss R, Santini T, Ibrahim TS, Aizenstein HJ Abstract Cerebral small vessel disease is associated with late-life depression, cognitive impairment, executive dysfunction, distress, and loss of life for older adults. Late-life depression is becoming a substantial public health burden, and a considerable number of older adults presenting to primary care have significant clinical depression. Even though white matter hyperintensities are linked with small vessel disease, white matter hyperintensities are nonspecific to small vessel disease and can co-occur with other brain diseases. Advanced neuroi...
Source: Advances in Experimental Medicine and Biology - Category: Research Tags: Adv Exp Med Biol Source Type: research
In this study, we used magnetic resonance imaging (MRI) of distal radius ossification to obtain data for age estimation. Wrist MRI scans from 338 individuals, aged 10 –29 years, were examined retrospectively using the staging system of Schmidt et al. and the extension of the stages as described by Timme et al. The results revealed that the minimum ages for stage 4a ossification were 16.0 years in women and 17.7 years in men, whereas those for stage 4b ossificat ion were 16.6 and 18.2 years in women and men, respectively. Stage 5 was not detected in any patient. These results were comparable with those of a previous s...
Source: International Journal of Legal Medicine - Category: Medical Law Source Type: research
AbstractIn a case of a fatal traffic accident, a suspicious finding was identified in the muscular tissue of the left thigh by whole-body postmortem computed tomography. To better interpret the finding, the lower extremities were investigated by magnetic resonance imaging (MRI) and proton magnetic resonance spectroscopy (1H-MRS). MRI revealed the presence of an evenly distributed intramuscular fluid and1H-MRS of a volume within the fluid detected concentrations of acetate and lactate. The fluid was assumed to be an extravasation of an intraosseous infusion, erroneously administered to the intermediate vastus of the left th...
Source: International Journal of Legal Medicine - Category: Medical Law Source Type: research
ConclusionStandard clinical MRI investigations may result in pronounced heating at the tip of epicardial electrodes. Epicardial leads, which are not connected to a pacemaker and thus mimicking abandoned leads, may even result in a more pronounced rise in temperature at the lead tip. Therefore, current epicardial pacing systems may carry a substantial risk of inducing thermal damage of the neighboring tissue during MRI scanning.
Source: Journal of Interventional Cardiac Electrophysiology - Category: Cardiology Source Type: research
Conclusions: Use of the FD with adjunctive loose coil embolization might help to alleviate the compressional symptoms caused by intracranial aneurysms. Shrinkage of the aneurysm, a short duration of symptoms, and younger patient age might contribute to favorable outcomes of mass effect-related symptoms.
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Publication date: Available online 10 November 2019Source: Journal of NeuroradiologyAuthor(s): Yeonah Kang, Kuo-Chen Wei, Cheng Hong TohAbstractPurpose: To evaluate the potential of quantitative dynamic susceptibility contrast (DSC) perfusion MR imaging parameters as imaging biomarkers for predicting intraoperative blood loss in meningioma.Methods: Fifty-one non-embolized meningioma patients who had undergone preoperative DSC perfusion MR imaging were retrospectively included. The corrected relative cerebral blood volume (rCBV) and leakage coefficient (K2) of the entire enhanced tumor were obtained using leakage correction...
Source: Journal of Neuroradiology - Category: Radiology Source Type: research
Publication date: Available online 10 November 2019Source: NeuroImageAuthor(s): Eulanca Y. Liu, Jia Guo, Aaron B. Simon, Frank Haist, David J. Dubowitz, Richard B. BuxtonAbstractQuantitative functional magnetic resonance imaging methods make it possible to measure cerebral oxygen metabolism (CMRO2) in the human brain. Current methods require the subject to breathe special gas mixtures (hypercapnia and hyperoxia). We tested a noninvasive suite of methods to measure absolute CMRO2 in both baseline and dynamic activation states without the use of special gases: arterial spin labeling (ASL) to measure baseline and activation c...
Source: NeuroImage - Category: Neuroscience Source Type: research
The brain is an energy-hungry organ, and is sensitive to reductions in the blood supply of oxygen and nutrients. Cardiovascular aging can reduce that supply, whether through conditions such as heart failure, or the progressive loss of density in capillary networks that occurs throughout the body with advancing age, or an accelerated pace of rupture of tiny vessels in the brain, or disruption of the blood-brain barrier, allowing unwanted molecules and cells to enter the brain. Thus, as researchers here note, we would expect to see correlations between cardiovascular disease, or risk factors for cardiovascular disease, and d...
Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs
Publication date: Available online 9 November 2019Source: NeuroImageAuthor(s): Raihaan Patel, Christopher J. Steele, Anthony Chen, Sejal Patel, Gabriel A. Devenyi, Jürgen Germann, Christine L. Tardif, M. Mallar ChakravartyAbstractIn this work we use non-negative matrix factorization to identify patterns of microstructural variance in the human hippocampus. We utilize high-resolution structural and diffusion magnetic resonance imaging data from the Human Connectome Project to query hippocampus microstructure on a multivariate, voxelwise basis. Application of non-negative matrix factorization identifies spatial componen...
Source: NeuroImage - Category: Neuroscience Source Type: research
This study was registered with Japan Registry of Clinical Trials (jRCTs052190026). PMID: 31701044 [PubMed]
Source: Clinical Prostate Cancer - Category: Cancer & Oncology Authors: Tags: Contemp Clin Trials Commun Source Type: research
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