Actual Flip Angle Imaging to Improve T1 Measurement for Short T2 Tissues

A variable flip angle method is a rapid T ₁ mapping method by exploiting steady-state signals at multiple flip angles. When combined with ultrashort echo-time imaging, T ₁ measurement for short T ₂ * tissues is also possible. However, flip angle errors due to miscalibration or B ₁ inhomogeneities, and T ₂ * relaxation effects during RF excitation can degrade the accuracy of T ₁ quantification. In this work, we propose the use of the actual flip imaging technique to correct flip angles to improve T ₁ measurement for short T ₂ tissues. Ex vivo study on bovine cortical bone and in vivo study on the Achilles tendon are presented.

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.