Anatomical Mri
Anatomical Mri - Related Videos
06:06
Optogenetic Functional MRI
0 Views •
Cited by 15 •
2016
This protocol describes the steps and data analysis required to successfully perform optogenetic functional magnetic resonance imaging (ofMRI). ofMRI is a novel technique that combines high-field fMRI readout with optogenetic stimulation, allowing for cell type-specific mapping of functional neural circuits and their dynamics across the whole living brain.
08:20
MRI-guided dmPFC-rTMS as a Treatment for Treatment-resistant Major Depressive Disorder
0 Views •
Cited by 31 •
2015
Here we outline the procedure for MRI-guided repetitive transcranial magnetic stimulation to the dorsomedial prefrontal cortex as an experimental treatment for major depressive disorder.
09:06
Whole-brain Segmentation and Change-point Analysis of Anatomical Brain MRI—Application in Premanifest Huntington's Disease
0 Views •
Cited by 4 •
2018
This paper describes a statistical model for volumetric MRI data analysis, which identifies the "change-point" when brain atrophy begins in premanifest Huntington's disease. Whole-brain mapping of the change-points is achieved based on brain volumes obtained using an atlas-based segmentation pipeline of T1-weighted images.
10:35
Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
0 Views •
Cited by 4 •
2015
The method presented here uses simultaneous positron emission tomography and magnetic resonance imaging. In the cerebral hypoxia-ischemia model, dynamic changes in diffusion and glucose metabolism occur during and after injury. The evolving and irreproducible damage in this model necessitates simultaneous acquisition if meaningful multi-modal imaging data are to be acquired.
01:11
Anatomical Positions
0 Views •
2023
In anatomy, several standard anatomical positions are used as references for describing the position and orientation of different body parts. These positions help provide a common frame of reference when discussing anatomical structures. The anatomical position is the standard reference point for describing the body's position and orientation. In this position: The body is upright, facing forward, and standing erect. The feet are parallel and flat on the floor. The arms are hanging by the...
FAQs
T1 and T2 relaxation describe how hydrogen nuclei return toward equilibrium after radiofrequency stimulation. Because tissues differ in these relaxation properties, the measured signals vary across regions and produce distinct levels of contrast. Selecting or interpreting contrast related to T1 or T2 therefore helps distinguish anatomical structures and improves the usefulness of brain images for structural assessment.
Its high-resolution structural views allow researchers to examine the arrangement and boundaries of brain regions rather than treating the brain as a single uniform volume. This distinction supports assessment of cortical and subcortical anatomy, helps identify where a lesion is located, and provides a structural basis for studying brain organization.
Tissue properties influence how hydrogen nuclei respond to the magnetic field and radiofrequency pulses and how their signals change during relaxation. Those differences determine the contrast recorded in the final image. Consequently, image appearance reflects tissue-specific behavior, not simply the physical size or shape of a brain region.
Alignment places results from different imaging approaches into a shared anatomical framework. Structural images can therefore provide the brain-region reference needed to interpret findings from functional or diffusion-based scans. In neuroscience, this combination connects measurements from different modalities with cortical and subcortical anatomy, strengthening analysis of brain organization and abnormalities.
Researchers can use the images to assess cortical and subcortical structures, localize lesions, and measure brain volume. These outputs support both qualitative examination of anatomy and quantitative evaluation of structural differences. The resulting information can be related to brain organization, disease-associated changes, or patterns observed across development and aging.
Repeated or comparative structural assessments can reveal how brain anatomy varies across developmental stages and aging. Measurements of cortical and subcortical structures, brain volume, and lesion location provide outcomes that can be compared among groups or conditions. This makes the method useful for investigating structural organization and age-related neurological differences.