Coronary MR angiography during peak-systole: work in progress

Area of Science:

• Cardiovascular Imaging
• Magnetic Resonance Imaging
• Medical Diagnostics

Background:

• Coronary artery imaging is crucial for diagnosing cardiovascular diseases.
• Two-dimensional (2D) breath-hold coronary MR angiography (CMRA) is a non-invasive technique.
• Optimizing imaging timing during the cardiac cycle is essential for diagnostic image quality.

Purpose of the Study:

• To compare the image quality of coronary arteries using 2D breath-hold CMRA.
• To evaluate image quality during peak systole versus mid-diastole.
• To determine the optimal cardiac phase for diagnostic CMRA.

Main Methods:

• Eight healthy volunteers underwent 2D CMRA using a 1.5-T MR imager.
• An ultrafast gradient-echo sequence with specific parameters was employed.
• Image quality, length, and proximal diameter of coronary arteries were assessed at peak systole and mid-diastole.

Main Results:

• High-quality CMRA images were obtained in 87.5% of visualized coronary vessels.
• No significant image degradation was observed in 57% of vessels when comparing systolic and diastolic images.
• Mild degradation occurred in 29% of vessels, with significant degradation in only 7%.

Conclusions:

• Existing 2D breath-hold CMRA provides diagnostic quality MR images in both peak systole and mid-diastole.
• There is little to no perceptible difference in image quality between these two cardiac phases.
• The technique offers consistent visualization of coronary arteries regardless of the breath-hold timing within systole or diastole.