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Topographic maps represent the Earth's surface features using contour lines, which connect points of equal elevation to create a two-dimensional representation of three-dimensional terrain. Creating a topographic map requires a systematic approach.Begin by plotting a scaled grid and marking intersections corresponding to the survey's elevation data points. Assign elevation values at these intersections to build the base map. Next, determine contour levels using a consistent contour interval,...
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Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
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Related Experiment Video

Updated: Jan 21, 2026

Cardiac Magnetic Resonance for the Evaluation of Suspected Cardiac Thrombus: Conventional and Emerging Techniques
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Cardiac T1 mapping: Techniques and applications.

Emily Aherne1, Kelvin Chow1,2, James Carr1

  • 1Department of Radiology, Northwestern University, Chicago, Illinois, USA.

Journal of Magnetic Resonance Imaging : JMRI
|July 24, 2019
PubMed
Summary
This summary is machine-generated.

Cardiac magnetic resonance (CMR) T1 mapping offers quantitative tissue characterization for cardiomyopathies. This advanced technique aids in identifying and quantifying myocardial edema, fibrosis, and infiltrative diseases.

Keywords:
ECVT1 mappingcardiac magnetic resonancemagnetic resonance imaging

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Area of Science:

  • Cardiovascular Imaging
  • Magnetic Resonance Imaging
  • Quantitative Myocardial Assessment

Background:

  • Cardiac magnetic resonance (CMR) imaging excels in tissue characterization.
  • Advanced CMR sequences enable reproducible, quantitative tissue analysis.
  • T1 mapping quantifies T1 relaxation time pixel-by-pixel for soft tissue interrogation.

Purpose of the Study:

  • To review the principles and techniques of T1 mapping in CMR.
  • To explore clinical applications of T1 mapping for myocardial diseases.
  • To discuss current limitations and future developments in T1 mapping.

Main Methods:

  • Review of T1 mapping principles and techniques.
  • Description of native T1, postcontrast T1, and extracellular volume mapping.
  • Analysis of clinical applications in cardiomyopathies.

Main Results:

  • T1 mapping is a promising technique for characterizing diseased myocardium.
  • Applications include identification and quantification of myocardial edema, fibrosis, and infiltrative diseases.
  • Illustrative clinical examples demonstrate the technique's utility.

Conclusions:

  • T1 mapping provides valuable quantitative insights into myocardial tissue.
  • The technique has broad clinical applications in diagnosing and managing cardiomyopathies.
  • Ongoing developments aim to address current limitations and enhance capabilities.