Abstract #3408
Extended Phase Graphs: Understanding a Common Misconception of the Framework which Leads to the Failure of Programming It Correctly
Matthias Weigel 1
1
Radiological Physics, Dept. of Radiology and
Nuclear Medicine, University of Basel Hospital, Basel,
Switzerland
The extended phase graph (EPG) concept is a favorite
approach for the rapid quantitation of magnetization
response. However, users frequently have problems to
properly program the framework. One major reason may be
that care has to be taken with the complex Fourier
domains of the transverse magnetization and their
inherent symmetry relations. The present educational
abstract depicts these issues and shows how RF pulses
and gradients act differently on the magnetization
components. Solutions to overcome the described issues
are presented and discussed. Additionally, the author
provides representative EPG software demonstrating the
solutions.
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