Abstract #4336
Encoding Methods for B 1 + Mapping in Parallel Transmission Systems at Ultra High Field
Desmond H. Y. Tse 1 , Michael S. Poole 1 , Arthur W. Magill 1 , Jrg Felder 1 , Daniel Brenner 1,2 , and N. Jon Shah 1,3
1
INM - 4, Research Centre Jlich GmbH,
Jlich, Germany,
2
German
Center for Neurodegenerative Diseases (DZNE), Bonn,
Germany,
3
Department
of Neurology, RWTH Aachen University, Aachen, Germany
Four different encoding methods for B
1
+
mapping
in parallel transmission system, namely 1-channel-on,
all-channels-on-except-1, all-channels-on-1-inverted and
RF phase encoding (PE), were evaluated using dual
refocusing acquisition mode (DREAM) at 9.4 T. RF PE,
which encodes each transmit channel by phase rotation,
was the least susceptible to artefacts caused by
destructive RF interference. It showed negligible
dependency on the initial RF phase setting and provides
a flexible way to increase the number of measurements to
increase SNR and reduce artefacts by weighted decoding.
These advantages of RF PE make it a good choice for B
1
+
mapping
at ultra high field.
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.
