T2*-sensitized high-resolution magnetic resonance venography using 3D-PRESTO technique

Area of Science:

• Neuroradiology
• Medical Imaging
• Neuroscience

Background:

• Detecting small cerebral veins and microbleeds is crucial for diagnosing various neurological conditions.
• Conventional MRI techniques may have limitations in visualizing these subtle structures.

Purpose of the Study:

• To evaluate the efficacy of the 3D-PRESTO (principles of echo shifting with a train of observations) technique in revealing small veins and microbleeds in the human brain.
• To compare the contrast-to-noise ratio (CNR) of 3D-PRESTO with other MRI sequences.

Main Methods:

• A phantom study compared 3D-PRESTO, 3D-gradient recalled echo (GRE), and 3D-GRE echo-planar imaging (EPI) for CNR.
• Seven healthy volunteers and five patients with venous anomalies or brain injuries underwent 3D-PRESTO MRI.
• MR venograms were reconstructed using minimum-intensity-projection (MinIP) at varying slice thicknesses.

Main Results:

• 3D-PRESTO demonstrated the highest CNR in phantom studies.
• Deep brain venous anatomy was clearly visualized in all volunteers across different slice thicknesses.
• The number of visible left medullary veins increased significantly with thicker slices (P=0.02 for 10mm vs 20mm).
• Small venous diseases and microbleeds were clearly depicted in patient studies.

Conclusions:

• High-resolution MR venography using the 3D-PRESTO technique provides clear visualization of small cerebral veins and microbleeds.
• 3D-PRESTO is a valuable tool for neuroimaging, improving the detection of subtle vascular abnormalities and hemorrhages.