Abstract #1494

Hybrid Proton Resonance Frequency Shift and Variable Flip Angle T1 Temperature Mapping using a Golden-Angle 3D Stack-of-Radial Technique

Le Zhang¹, Tess Armstrong^1,2, Samantha Mikaiel^1,2, Alan Priester³, Rory Geoghegan⁴, Shyam Natarajan^3,4, and Holden Wu^1,2,4

¹Radiological Sciences, University of California Los Angeles, Los Angeles, CA, United States, ²Physics and Biology in Medicine, University of California Los Angeles, Los Angeles, CA, United States, ³Urology, University of California Los Angeles, Los Angeles, CA, United States, ⁴Bioengineering, University of California Los Angeles, Los Angeles, CA, United States

Proton resonance frequency shift (PRF) is widely used for MR temperature mapping, but is not applicable in adipose tissues. T₁ measurement is an alternative MR temperature mapping method that can be applied in adipose tissues. Combined PRF-T₁ mapping has been evaluated for Cartesian MRI, but there is a lack of research for non-Cartesian techniques. In this work, we propose a new multi-echo 3D stack-of-radial technique that combines PRF and variable-flip-angle T₁ measurement for MR temperature mapping. Preliminary results from laser ablation in phantoms demonstrate good agreement between temperature derived from both PRF and T₁ compared to readings of temperature probes.

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.