Chest MRI Using Multivane-XD, a Novel T2-Weighted Free Breathing MR Sequence

Area of Science:

• Radiology and Medical Imaging
• Magnetic Resonance Imaging (MRI)
• Thoracic Imaging

Background:

• Conventional MRI sequences for chest imaging present limitations in image quality and artifact reduction.
• The development of advanced MRI techniques is crucial for improving diagnostic accuracy in thoracic imaging.
• Free-breathing sequences are desirable for chest MRI to minimize motion artifacts.

Purpose of the Study:

• To compare the image quality of free-breathing T2-weighted MultiVane-XD (MVXD) sequence with conventional MRI sequences in chest imaging.
• To evaluate the performance of MVXD in visualizing mediastinal structures, airways, and pulmonary lesions.
• To assess the presence and severity of artifacts across different sequences.

Main Methods:

• Twenty-one patients underwent chest MRI at 1.5 T, including T2W MVXD, STIR, BTFE, T1 FFE, and T1PG sequences.
• Two experienced reviewers assessed image quality, sharpness, visualization of mediastinal and intrapulmonary vessels and airways, lesion detection, and artifacts using 5-point scales.
• Statistical analysis involved pairwise comparisons using unpaired Student's t-test.

Main Results:

• T2W MVXD demonstrated significantly superior overall image quality and sharpness compared to STIR, T1 FFE, and T1PG sequences (P < 0.01).
• MVXD provided significantly better visualization of mediastinal airways and improved intrapulmonary lesion detection compared to all conventional sequences (P < 0.03).
• While BTFE and T1PG were superior for great vessel visualization, MVXD showed comparable overall quality to BTFE and significantly better quality than STIR, T1 FFE, and T1PG.

Conclusions:

• The T2-weighted MultiVane-XD sequence offers enhanced overall image quality, sharpness, and improved visualization of mediastinal airways and pulmonary lesions.
• MVXD represents a promising advancement for thoracic radiologists, potentially improving diagnostic capabilities in chest MRI.
• The free-breathing nature and improved image characteristics of MVXD make it a valuable addition to the thoracic imaging toolkit.