Multislice first-pass myocardial perfusion imaging on a conventional clinical scanner

Area of Science:

• Cardiovascular Imaging
• Magnetic Resonance Imaging
• Medical Physics

Background:

• Myocardial perfusion imaging is crucial for diagnosing cardiac conditions.
• Traditional techniques can be limited by acquisition speed and resolution.
• Advanced magnetic resonance imaging (MRI) methods are needed to improve diagnostic capabilities.

Purpose of the Study:

• To demonstrate a modified keyhole imaging technique for multislice, first-pass contrast-enhanced myocardial perfusion.
• To evaluate the feasibility and accuracy of this novel MRI approach.

Main Methods:

• Utilized a modified keyhole imaging technique sampling limited k-space segments.
• Employed alternate sampling of keyhole data with Fourier interpolation for missing data.
• Applied time-domain Fourier filtering for motion artifact reduction due to respiration.
• Conducted studies on 46 patients at 1.5 T using gadoteridol contrast agent.

Main Results:

• Successfully acquired and processed multislice, first-pass contrast-enhanced perfusion images.
• Demonstrated visualization of contrast agent accumulation via image subtraction.
• Achieved fully concordant results with radionuclide imaging in 27 out of 46 patients.
• Identified discordance in remaining studies due to inherent differences between MRI and radionuclide contrast agents.

Conclusions:

• The modified keyhole technique is a viable method for myocardial perfusion imaging.
• This approach offers potential for improved visualization and diagnostic accuracy in cardiac MRI.
• Further research may be needed to fully reconcile findings with radionuclide imaging due to contrast agent characteristics.