Combined magnetic resonance imaging (MRI) and spectroscopy (MRS) allows unique experimental insights into the central nervous system (CNS) disorders. Clinical applications are forthcoming. In order to address the potential clinical uses of MRI/MRS, experimentally induced focal brain lesions were evaluated with this modality. Focal lesions more closely mirror clinical situations than do global insults, but have rarely been the focus of MRS studies. Fluid-percussion trauma in 48 rats, focal ischemia in 18 rats and in 16 mongrel dogs were produced, with various degrees of severity. A discrepancy between temporal evolution data of MRI and MRS was found: MRI always showed an increase in lesion extension over time while 31P and 1H MRS almost always showed improvement. The severity and evolution of these MRS findings was surprising, and differed from the results reported for global brain injuries. Besides possibly reflecting real improvement in the metabolic state, other explanations for the phenomena exist. Diffusion of inorganic phosphate out of the regional site of injury and its reincorporation for more prominent lactate build-up in regional injury are possible. Therefore the use of MRS to predict metabolic and clinical outcomes of regional brain injury requires methodologic caution, but its combination to MRI offers an unprecedented tool for studies of focal CNS pathology.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
ds-FCRN: three-dimensional dual-stream fully convolutional residual networks and transformer-based global-local feature learning for brain age prediction.
Brain Struct Funct
January 2025
Department of Biomedical Engineering, College of Chemistry and Life Sciences, Beijing University of Technology, Beijing, 100124, China.
The brain undergoes atrophy and cognitive decline with advancing age. The utilization of brain age prediction represents a pioneering methodology in the examination of brain aging. This study aims to develop a deep learning model with high predictive accuracy and interpretability for brain age prediction tasks.
View Article and Find Full Text PDFFlexible Tactile Sensors with Self-Assembled Cilia Based on Magnetoelectric Composites.
ACS Appl Mater Interfaces
January 2025
School of Precision Instrument and Optoelectronics Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, China.
Traditional tactile sensors are single-function, and it is difficult to meet the needs of applications in complex environments. This paper describes the development and applications of flexible tactile sensors with cilia based on magnetoelectric composites made of neodymium iron boron (NdFeB) microparticles with a silver (Ag) nanoshell in polydimethylsiloxane (PDMS). These sensors adopt the inherent magnetism of NdFeB microparticles and the excellent conductivity of the Ag coating.
View Article and Find Full Text PDFEasily Water-Synthesisable Iron-Chloranilate Frameworks as High Energy and High-Power Cathodes for Sustainable Alkali-Ion Batteries.
Angew Chem Int Ed Engl
January 2025
Universidad Complutense de Madrid Facultad de Ciencias Quimicas, Inorganic Chemistry Department, 28034, Madrid, SPAIN.
Achieving high battery performance from low-cost, easily synthesisable electrode materials is crucial for advancing energy storage technologies. Metal organic frameworks (MOFs) combining inexpensive transition metals and organic ligands are promising candidates for high-capacity cathodes. Iron-chloranilate-water frameworks are herein reported to be produced in aqueous media under mild conditions.
View Article and Find Full Text PDFSub-Microliter H Magnetic Resonance Spectroscopy for In Vivo High-Spatial Resolution Metabolite Quantification in the Mouse Brain.
J Neurochem
January 2025
Core Facility Small Animal MRI, Ulm University, Ulm, Germany.
Proton magnetic resonance spectroscopy (MRS) offers a non-invasive, repeatable, and reproducible method for in vivo metabolite profiling of the brain and other tissues. However, metabolite fingerprinting by MRS requires high signal-to-noise ratios for accurate metabolite quantification, which has traditionally been limited to large volumes of interest, compromising spatial fidelity. In this study, we introduce a new optimized pipeline that combines LASER MRS acquisition at 11.
View Article and Find Full Text PDF[Research progress on the diagnosis of pediatric heart failure].
Zhongguo Dang Dai Er Ke Za Zhi
January 2025
Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University/National Clinical Medical Research Centre for Children's Health and Diseases/National International Science and Technology Cooperation Base for Major Diseases of Children's Development/Key Laboratory of Children's Vital Organ Development and Diseases of Chongqing Municipal Health Commission/National Key Clinical Cardiovascular Specialty, Chongqing 400014, China.
Heart failure is a complex clinical syndrome and pediatric heart failure (PHF) has a high mortality rate. Early diagnosis is crucial for treatment and management of PHF. In clinical practice, various tests and examinations play a key role in the diagnosis of PHF, including continuously updated biomarkers, echocardiography, and cardiac magnetic resonance imaging.
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!