First-pass myocardial perfusion MR imaging with interleaved notched saturation: feasibility study

Area of Science:

• Cardiovascular Magnetic Resonance Imaging
• Medical Imaging Physics

Background:

• T1-weighted first-pass myocardial perfusion imaging is crucial for diagnosing heart conditions.
• Optimizing magnetization preparation is key to improving image quality and diagnostic accuracy.
• Existing methods may face limitations in achieving sufficient magnetization recovery and section coverage.

Purpose of the Study:

• To evaluate a novel magnetization preparation scheme with a "notched" section profile for T1-weighted first-pass myocardial perfusion MRI.
• To assess the feasibility and effectiveness of this technique in adult patients at 1.5 Tesla.

Main Methods:

• The study employed a pulse sequence combining a specific preparation sequence with a "notched" profile and an interleaved gradient-echo echo-planar imaging sequence.
• Image contrast was evaluated in a feasibility study involving 12 adult patients.

Main Results:

• The "notched" saturation pulse enabled extended magnetization recovery times.
• This approach successfully maintained comprehensive section coverage.
• Excellent image contrast was achieved between normal and ischemic myocardium.

Conclusions:

• The evaluated "notched" magnetization preparation scheme is effective for T1-weighted first-pass myocardial perfusion MRI.
• This technique offers improved image contrast, potentially enhancing diagnostic capabilities for myocardial ischemia.