AI Article Synopsis
Article Abstract
A detailed analysis procedure is described for evaluating rates of volumetric change in brain structures based on structural magnetic resonance (MR) images. In this procedure, a series of image processing tools have been employed to address the problems encountered in measuring rates of change based on structural MR images. These tools include an algorithm for intensity non-uniformity correction, a robust algorithm for three-dimensional image registration with sub-voxel precision and an algorithm for brain tissue segmentation. However, a unique feature in the procedure is the use of a fractional volume model that has been developed to provide a quantitative measure for the partial volume effect. With this model, the fractional constituent tissue volumes are evaluated for voxels at the tissue boundary that manifest partial volume effect, thus allowing tissue boundaries be defined at a sub-voxel level and in an automated fashion. Validation studies are presented on key algorithms including segmentation and registration. An overall assessment of the method is provided through the evaluation of the rates of brain atrophy in a group of normal elderly subjects for which the rate of brain atrophy due to normal aging is predictably small. An application of the method is given in Part II where the rates of brain atrophy in various brain regions are studied in relation to normal aging and Alzheimer's disease.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/s0730-725x(02)00466-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Idiopathic Optic Nerve Glioma: A Case Report.
Cureus
December 2024
Department of Ophthalmology, Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, IND.
Optic nerve gliomas are tumors that develop along the optic nerve pathway, most often classified as pilocytic astrocytomas. These growths are typically benign, especially in young children between the ages of one and six years, while the rarer malignant types are generally more aggressive and tend to appear in adults. Characteristically slow-growing, optic nerve gliomas are commonly located in the pre-chiasmal part of the optic nerve but can extend to post-chiasmal regions and into the brain if left untreated.
View Article and Find Full Text PDFFavorable response to ketogenic diet therapy in a patient with -related epilepsy.
Epilepsy Behav Rep
March 2025
Section of Pediatric Neurology, Department of Pediatrics, The University of Chicago, Chicago, IL, United States.
Dynein Cytoplasmic 1 Heavy chain 1 (-related disorders are a spectrum of conditions including neurodevelopmental disorders, congenital brain malformations, and neuromuscular diseases. These clinical features may co-occur, with four main disease entities including epilepsy with developmental epileptic encephalopathy such as infantile epileptic spasms syndrome (IESS) and Lennox-Gastaut syndrome (LGS), axonal Charcot-Marie-Tooth disease type 2O, spinal muscular atrophy with lower extremity-predominance (SMALED), and congenital cortical malformations. Epilepsy associated with this disorder often becomes drug-resistant and requires multiple medications and, in some cases, non-pharmacological treatments.
View Article and Find Full Text PDFAge-related disturbances in rest-activity rhythms and integrity of the hippocampal network: An exploratory study.
Neurobiol Sleep Circadian Rhythms
May 2025
INCIA, EPHE, Université PSL, Univ Bordeaux, CNRS, 146, Rue Léo Saignat, 33076, Bordeaux, France.
To better understand the relationship between the rest-activity rhythms and cognitive impairments during aging, we assessed the longitudinal changes in the rest-activity rhythms in an elderly population and their possible detrimental effect on the hippocampal network. This was done longitudinally in a rural cohort with two actigraphic assessments and brain imaging examinations, seven years apart. A segmentation of the hippocampus and its related structures was used to assess volumes and functional connectivity in this network based on anatomical and resting state functional data.
View Article and Find Full Text PDFNovel peptidomimetic compounds attenuate hypoxic-ischemic brain injury in neonatal rats.
Exp Neurol
January 2025
Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA. Electronic address:
Hypoxic-ischemic (HI) brain injury is a common neurological problem in neonates. The postsynaptic density protein-95 (PSD-95) is an excitatory synaptic scaffolding protein that regulates synaptic function, and represents a potential therapeutic target to attenuate HI brain injury. Syn3 and d-Syn3 are novel high affinity cyclic peptides that bind the PDZ3 domain of PSD-95.
View Article and Find Full Text PDFRelationship Between Structural and Functional Network Connectivity Changes for Patients With Traumatic Brain Injury and Chronic Health Symptoms.
Eur J Neurosci
January 2025
WRIISC-Women, VA Palo Alto Health Care System, Palo Alto, California, USA.
Combination of structural and functional brain connectivity methods provides a more complete and effective avenue into the investigation of cortical network responses to traumatic brain injury (TBI) and subtle alterations in brain connectivity associated with TBI. Structural connectivity (SC) can be measured using diffusion tensor imaging to evaluate white matter integrity, whereas functional connectivity (FC) can be studied by examining functional correlations within or between functional networks. In this study, the alterations of SC and FC were assessed for TBI patients, with and without chronic symptoms (TBIcs/TBIncs), compared with a healthy control group (CG).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!