Related Experiment Video
Updated: Jul 11, 2026

Optimization, Test and Diagnostics of Miniaturized Hall Thrusters
Published on: February 16, 2019
A review of MR physics: 3T versus 1.5T
Brian J Soher1, Brian M Dale, Elmar M Merkle
1Center for Advanced MR Development, Duke University Medical Center, Box 3808, Durham, NC 27710, USA. brian.soher@duke.edu
Abstract:
This article illustrates changes in the underlying physics concepts related to increasing the main magnetic field from 1.5T to 3T. The effects of these changes on tissue constants and practical hardware limitations is discussed as they affect scan time, quality, and contrast. Changes in susceptibility artifacts, chemical shift artifacts, and dielectric effects as a result of the increased field strength are also illustrated. Based on these fundamental considerations, an overall understanding of the benefits and constraints of signal-to-noise ratio and contrast-to-noise ratio changes between 1.5T and 3T MR systems is developed.
Related Concept Videos
Comparison Between Electrical And Gravitational Forces
Since both are inverse square law forces, the distance gets canceled when the ratio of the two forces is considered. Instead, the ratio of the electrical and gravitational forces depends on...
Torque
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
Three-Dimensional Force System
Gravitation Between Spherically Symmetric Masses
Models, Theories, and Laws
Apparent Weight
Consider a person standing on a bathroom scale inside an elevator. If the scale is accurate at rest, its reading equals the...

