MRI venous architecture of insula

Area of Science:

• Neuroimaging
• Neuroanatomy
• Neurosurgery

Background:

• The insula's complex venous anatomy is critical for understanding brain function and pathology.
• Venous gliography, using MR imaging and reconstruction, aids in visualizing these intricate structures.

Purpose of the Study:

• To describe the venous anatomy of the insula.
• To utilize conventional MR brain imaging and confocal reconstructions for detailed anatomical assessment.
• To investigate venous anatomy in cases of glioma-induced venous dilatation.

Main Methods:

• Retrospective review of 19 patients with insular gliomas using thin-cut, post-contrast T1-weighted MRI.
• Application of reconstruction techniques (Anatom-e and Osirix) for enhanced visualization.
• Detailed analysis of insular and peri-insular venous structures.

Main Results:

• Identification of key insular and peri-insular veins: superficial middle cerebral vein (SMCV), peri-insular sulcus vein, vein of the anterior limiting sulcus, precentral, central, and posterior sulcus veins, communicating veins, and deep MCV.
• Demonstration of the utility of confocal imaging in delineating venous structures in multiple planes.
• Successful visualization of the relationship between superficial and deep middle cerebral veins and the insula.

Conclusions:

• The venous anatomy of the insula is intricate and frequently underestimated in standard MR brain imaging.
• Confocal imaging significantly aids in identifying insular veins and their spatial relationship to the insula.
• Accurate knowledge of insular venous architecture is vital for differentiating veins from arteries and for effective presurgical planning in insular glioma resection.