T1 Mapping
T1 Mapping - Related Videos
06:58
Fate Mapping
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2023
Fate mapping is a technique used to understand how embryonic cells divide, differentiate, and migrate during development. In classic fate mapping experiments, cells in different areas of an embryo are labeled with a chemical dye and then tracked to determine which tissues or structures they form. Technological improvements now allow for individual cells to be marked and traced throughout embryonic development and adulthood. This video reviews the concepts behind fate mapping, and then details a...
11:03
Motor Maps
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California One principle of brain organization is the topographic mapping of information. Especially in sensory and motor cortices, adjacent regions of the brain tend to represent information from adjacent parts of the body, resulting in maps of the body expressed on the surface of the brain. The primary sensory and motor maps in the brain surround a prominent sulcus known as the central sulcus. The cortex...
06:48
Automated Segmentation of Cortical Grey Matter from T1-Weighted MRI Images
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2019
This protocol describes the process of applying seven different automated segmentation tools to structural T1-weighted MRI scans to delineate grey matter regions that can be used for the quantification of grey matter volume.
10:27
A Standardized Protocol for Functional Motor Mapping Using Navigated Transcranial Magnetic Stimulation
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2026
Here, we describe a standardized protocol for motor mapping using nTMS combined with diffusion tensor imaging (DTI)-based reconstruction of the corticospinal tract (CST). The protocol is reproducible, clinically feasible, and readily integrable into routine clinical workflows, providing a robust and valuable framework for motor pathway assessment, neuroplasticity research, and rehabilitation planning.
07:13
Using Topographic Maps to Generate Topographic Profiles
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2023
Source: Laboratory of Alan Lester - University of Colorado Boulder Topographic maps are "plan-view" representations of Earth's three-dimensional surface. They are a standard type of map-view that provides an overhead, or aerial, perspective. Among the defining features of a topographic map are the contour lines that indicate locations of constant elevation. The elevation interval between the contour lines is dependent on the level of detail provided by the map and the kind of topography present.
FAQs
Each delay samples the tissue’s signal at a different point during longitudinal recovery. Collecting images across multiple preparation or inversion delays creates a recovery pattern rather than relying on one image. The range of sampled delays therefore supplies the information needed to estimate a T1 value for each pixel and distinguish tissues with different relaxation behavior.
Fitting converts the series of changing signal measurements into a quantitative relaxation value for every image pixel. This provides numerical tissue information that conventional image contrast alone does not directly supply. The resulting map can reveal spatial differences in tissue properties, supporting characterization of abnormalities that may be diffuse rather than confined to an obvious focal lesion.
Conventional MRI primarily displays differences in image contrast, whereas T1 mapping assigns a calculated longitudinal relaxation value to each pixel. That quantitative representation makes tissue differences measurable rather than only visually apparent. In medical imaging, the distinction is important when altered edema, inflammation, fibrosis, fat, or extracellular composition produces subtle or widespread changes.
The workflow begins by acquiring images after different preparation or inversion delays. The signal values from corresponding image pixels are then organized as a recovery pattern and fitted to calculate the longitudinal relaxation time. Displaying those calculated values across the image produces a map that can be examined for regional or diffuse tissue variation.
T1 mapping is especially valuable for cardiac and abdominal imaging, where tissue abnormalities may be distributed broadly rather than appearing as a single conspicuous focus. Its quantitative measurements support noninvasive tissue characterization, helping identify changes linked to disease and providing a basis for assessing treatment-related changes and monitoring pathology over time.
Differences in mapped T1 values can reflect tissue changes associated with edema, inflammation, fibrosis, fat, or altered extracellular composition. These findings extend assessment beyond anatomy and visual image appearance by indicating that tissue properties have changed. In clinical research and imaging follow-up, the maps can therefore support detection, characterization, and monitoring of pathology.