3D Whole-heart free-breathing qBOOST-T2 mapping

Area of Science:

• Cardiovascular Magnetic Resonance Imaging
• Medical Imaging Technology
• Quantitative MRI

Background:

• Accurate myocardial T2 mapping is crucial for diagnosing and monitoring cardiovascular diseases.
• Current methods for cardiac MRI often require long scan times or separate acquisitions for different image contrasts.

Purpose of the Study:

• To develop and evaluate an accelerated, motion-corrected 3D whole-heart imaging technique (qBOOST-T2).
• To enable simultaneous high-resolution bright-blood and black-blood cardiac MR imaging.
• To achieve quantitative myocardial T2 characterization in a single scan.

Main Methods:

• Acquisition of three undersampled interleaved balanced steady-state free precession cardiac MR volumes with different magnetization preparations.
• Use of image navigators for respiratory motion correction.
• Low-rank patch-based reconstruction for 3D volume generation.
• Phase-sensitive reconstruction for black-blood imaging and dictionary matching for T2 map generation.

Main Results:

• High linear correlation (R² = 0.99) between qBOOST-T2 and T2 spin echo measurements in phantom studies.
• Good in vivo image quality with 4x undersampling.
• Comparable in vivo T2 values between qBOOST-T2 (55.8 ± 2.7 ms) and standard 2D methods (53.1 ± 2.1 ms) with good correlation (R² = 0.61).

Conclusions:

• The qBOOST-T2 sequence successfully acquires co-registered 3D bright- and black-blood volumes and T2 maps in approximately 11 minutes.
• The technique demonstrates promising results for accurate T2 quantification in cardiac MRI.
• This accelerated approach offers potential for improved clinical cardiovascular assessment.