Abstract #5098

T1 and T2 measurement variability across commercial and prototype 0.55T systems

Kathryn E Keenan¹, Bilal Tasdelen², Adrienne E Campbell-Washburn³, Harish Sharma⁴, Ahsan Javed³, Rajiv Ramasawmy³, Michele N Martin¹, Nicole Seiberlich⁴, and Krishna Nayak²

¹NIST, Boulder, CO, United States, ²Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, ³Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, ⁴Department of Radiology, University of Michigan, Ann Arbor, MI, United States

Synopsis

Keywords: Quantitative Imaging, RelaxometryWe compare T1 and T2 measurements between the Free.Max and ramped-down Aera using the ISMRM/NIST system phantom at multiple sites. All 0.55T systems had comparable, to each other, measurements of T1 and T2 on both the NiCl2 and MnCl2 arrays. The T1 measurement of the NiCl2 array by VFA-GRE with B1+correction was overestimated compared to the site-reference by 1% to 92%. The rest of the measurements – MnCl2 T1, NiCl2 T2, and MnCl2 T2 – were within +/-20% of the site-reference and NMR-reference values. As adoption of 0.55T platforms increases, it is important to characterize and compare systems across sites.

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.