Abstract #1654
High speed, high sensitivity MR thermometry using a balanced steady-state free precession pulse sequence
Yuan Zheng 1 and G. Wilson Miller 2
1
Physics, University of Virginia,
Charlottesville, VA, United States,
2
Radiology
and Medical Imaging, University of Virginia,
Charlottesville, VA, United States
We have developed a proton resonance frequency shift (PRFS)
based MR thermometry technique that collects
temperature-sensitive phase images using a balanced
steady-state free precession (bSSFP) pulse sequence. Our
technique makes use of the sharp phase transition of
bSSFP images over a narrow frequency range near
resonance. Although the phase transition is non-linear,
the phase change can be accurately mapped to PRFS (and
thus temperature) using a pre-scanned phase transition
curve. We performed phantom experiments using MR-guided
focused ultrasound, to demonstrate the advantages of our
bSSFP technique over conventional GRE-based methods for
measuring small, fast temperature changes at the
ultrasound focus.
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.
