Mesenteric circulation: three-dimensional MR angiography with a gadolinium-enhanced multiecho gradient-echo technique

Area of Science:

• Medical Imaging
• Radiology
• Vascular Imaging

Background:

• Mesenteric circulation assessment is crucial for diagnosing various abdominal conditions.
• Traditional imaging methods may have limitations in visualizing the complex mesenteric vasculature.

Purpose of the Study:

• To evaluate the efficacy of a specific magnetic resonance (MR) angiography technique for visualizing mesenteric and portal circulation.
• To assess the resolution and speed of MR angiography in depicting mesenteric arteries and veins.

Main Methods:

• Utilized a gadolinium-enhanced, breath-hold, fat-saturated, multiecho, three-dimensional, gradient-echo MR angiography sequence.
• Examined 16 individuals (12 patients, 4 volunteers), performing 20 examinations.
• Assessed image quality using a five-point scale (grades 3 or 4 considered good visualization).

Main Results:

• Excellent visualization (grades 3-4) was achieved in 85% of superior mesenteric artery trunks and veins, and portal veins.
• Good visualization rates decreased for more distal branches: 75% for celiac arteries, 25% for inferior mesenteric arteries, 75% for first-order branches, 60% for second-order, and 50% for third-order branches.
• The MR angiography technique provided excellent resolution in a short examination time.

Conclusions:

• Gadolinium-enhanced, breath-hold, fat-saturated, multiecho, 3D gradient-echo MR angiography is a valuable tool for evaluating mesenteric and portal venous systems.
• The technique demonstrates high efficacy in visualizing major mesenteric arteries and veins, with decreasing visualization of smaller branches.
• This MR angiography approach offers a rapid and high-resolution method for assessing mesenteric vascular anatomy.