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Lower hippocampal volume in patients suffering from depression: a meta-analysis.
TLDR
A meta-analysis of studies that used magnetic resonance imaging to assess the volume of the hippocampus and related structures in patients with major depressive disorder found inclusion of the amygdala with the hippocampus appears to have decreased the likelihood of detecting volumetric differences in either structure.
Course of illness, hippocampal function, and hippocampal volume in major depression
TLDR
Comparing hippocampal function, as assessed by performance on hippocampal-dependent recollection memory tests, and hippocampal volumes, as measured in a 1.5-T magnetic resonance imager, in depressed subjects experiencing a postpubertal onset of depression revealed a significant logarithmic association between illness duration and hippocampusal volume.
Slower progression of Parkinson's disease with ropinirole versus levodopa: The REAL‐PET study
TLDR
Ropinirole is associated with slower progression of PD than levodopa as assessed by 18F‐dopa PET, and this prospective, 2‐year, randomized, double‐blind, multinational study compared the rates of loss of dopamine‐terminal function in de novo patients with clinical and 18F-dopaPET evidence of early PD.
Simultaneous MR/PET imaging of the human brain: feasibility study.
TLDR
Simultaneous MR/PET imaging is feasible in humans, opening up new possibilities for the emerging field of molecular imaging.
Reproducibility of Standardized Uptake Value Measurements Determined by 18F-FDG PET in Malignant Tumors
TLDR
This study demonstrates that repeated measurements of SUVmean performed a few days apart are highly reproducible and a decrease of 0.5 in the SUV is statistically significant.
Dopamine visualized in the basal ganglia of living man
TLDR
It is shown here that L-3,4-dihydroxyphenylalanine (L-dopa) labelled in the 6-position with the positron-emitting radionuclide fluorine-18, localizes specifically in the dopaminergic pathways of the human brain where its turnover could be measured atraumatically by positron emission tomography.
Course of Illness, Hippocampal Function, and Hippocampal Volume in Major Depression
TLDR
Comparing hippocampal function, as assessed by performance on hippocampal-dependent recollection memory tests, and hippocampal volumes, as measured in a 1.5-T magnetic resonance imager, in depressed subjects experiencing a postpubertal onset of depression revealed a significant logarithm...
Where the imaginal appears real: a positron emission tomography study of auditory hallucinations.
TLDR
Inappropriate activation of the right anterior cingulate may lead self-generated thoughts to be experienced as external, producing spontaneous auditory hallucinations.
Enhanced salience and emotion recognition in Autism: a PET study.
TLDR
It is suggested that the recognition of emotion by adults with autism is achieved through recruitment of brain regions concerned with allocation of attention, sensory gating, the referencing of perceptual knowledge, and categorization.
Neural network based segmentation of magnetic resonance images of the brain
TLDR
This study presents the application of a Learning Vector Quantization (LVQ) Artificial Neural Network for the multispectral supervised classification of MR images and shows that tissue segmentation using LVQ ANN also performs better and faster than that using back-propagation ANN.
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