Abstract #3764
Highly dynamic k T -points to minimize the B 1 + inhomogeneity effects in T 2 -weighted imaging at 7T
Florent Eggenschwiler 1 , Kieran R. O'Brien 2 , Daniel Gallichan 1 , Rolf Gruetter 1,2 , and Jose P. Marques 3
1
Laboratory for Functional and Metabolic
Imaging, Ecole Polytechnique Fdrale de Lausanne,
Lausanne, Vaud, Switzerland,
2
Department
of Radiology, University of Geneva, Geneva, Geneva,
Switzerland,
3
Department
of Radiology, University of Lausanne, Lausanne, Vaud,
Switzerland
At ultra-high magnetic field, the inhomogeneous
distribution of the B
1
+
field
can significantly impair the quality of turbo spin echo
sequences. Static k
T
-points where a unique
pulse is designed in the STA regime and then dynamic k
T
-points
where a specific k
T
-point pulse is optimized
for each pulse of the turbo spin echo sequence were
proposed to generate T
2
-weighted images with
increasingly improved signal and contrast homogeneities.
In this work, the dynamic k
T
-point design is
further improved by allowing an increased flexibility
for the optimization of the excitation pulse and by
choosing carefully the cost function used in the
optimization algorithm.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Click here for more information on becoming a member.
