Fast high-resolution T1 mapping using inversion-recovery Look-Locker echo-planar imaging at steady state:...

Area of Science:

• Magnetic Resonance Imaging
• Quantitative Imaging

Background:

• Accurate T(1) mapping is crucial for various MRI applications.
• Conventional T(1) measurement sequences can be time-consuming, limiting resolution and coverage.
• Optimizing sequence parameters is essential for reliable quantitative T(1) measurements.

Purpose of the Study:

• To present a fast T(1) measurement sequence, inversion recovery Look-Locker echo-planar imaging at steady state (IR LL-EPI SS).
• To optimize imaging parameters for accuracy and reliability in T(1) measurements.
• To evaluate the performance of IR LL-EPI SS compared to conventional methods.

Main Methods:

• Developed and implemented the IR LL-EPI SS sequence.
• Optimized sequence parameters to minimize bias and maximize accuracy.
• Compared IR LL-EPI SS with the conventional IR LL-EPI sequence.

Main Results:

• The IR LL-EPI SS sequence eliminates the need for full magnetization recovery delay, saving acquisition time.
• Optimized IR LL-EPI SS achieved similar accuracy and reliability to conventional IR LL-EPI.
• Acquisition time was reduced by 20% with the IR LL-EPI SS method.
• Quantitative T(1) mapping with 1 x 1 x 4 mm(3) resolution and whole-brain coverage was achieved in approximately 4 minutes.

Conclusions:

• IR LL-EPI SS is a fast and accurate method for high-resolution T(1) mapping.
• The sequence significantly reduces acquisition time, enabling efficient whole-brain coverage.
• Optimized IR LL-EPI SS offers a valuable tool for quantitative MRI applications.