Catheter-directed gadolinium-enhanced MR angiography.

Area of Science:

• Medical Imaging
• Interventional Radiology
• Cardiovascular Imaging

Background:

• Conventional digital subtraction angiography (DSA) using X-ray is standard for vascular imaging during interventions.
• MRI-guided interventions are advancing, necessitating compatible imaging techniques.
• Gadolinium-based contrast agents are crucial for Magnetic Resonance Angiography (MRA).

Purpose of the Study:

• To evaluate the utility of catheter-directed gadolinium-enhanced MRA in MRI-guided endovascular interventions.
• To compare the benefits of intra-arterial (IA) injections versus conventional intravenous (IV) injections of gadolinium contrast agents.

Main Methods:

• Utilized catheter-directed gadolinium-enhanced MRA during MRI-guided endovascular procedures.
• Administered gadolinium contrast via local IA injections.
• Assessed capabilities for blood vessel depiction and intervention guidance.
• Evaluated background suppression effects.

Main Results:

• Catheter-directed Gd-enhanced MRA demonstrated capabilities comparable to conventional X-ray DSA.
• IA injections allowed for rapid depiction of blood vessels, aiding interventional guidance.
• IA injections significantly reduced the required gadolinium contrast agent dose compared to IV injections.
• Facilitated enhanced background suppression, including adjacent vascular beds.

Conclusions:

• Catheter-directed Gd-enhanced MRA is a viable alternative to conventional DSA in MRI-guided interventions.
• IA contrast injection offers reduced dose and improved background suppression.
• The expanding use of MRI guidance is expected to increase the clinical application of catheter-based Gd injections.