Determination of intracerebral structures using osseous reference points for computer-aided stereotactic operations

Area of Science:

• Neurosurgery
• Medical Imaging
• Biomechanical Engineering

Background:

• Stereotactic neurosurgery often requires precise localization of subcortical targets.
• Current methods may involve invasive procedures or less accurate estimations.
• Computer-aided techniques offer potential for improved accuracy and reduced invasiveness.

Purpose of the Study:

• To develop a simplified method for calculating subcortical target points in computer-aided stereotactic neurosurgery.
• To avoid the need for air-filling of the ventricles during neurosurgical planning.
• To establish reliable craniocerebral parameters for accurate anatomical localization.

Main Methods:

• Analysis of 403 random pneumo-encephalographic studies.
• Measurement of craniocerebral parameters, correlated with patient age and sex.
• Development of a formula and table to determine the foramen of Monro entrance and intracerebral baseline inclination from plain X-rays.

Main Results:

• Established a correlation between the bony cranium and the brain axis.
• Developed a formula and table to determine the foramen of Monro entrance with a standard deviation of +/- 1.5 mm.
• Enabled determination of various subcortical targets using computer programs based on these parameters.

Conclusions:

• Craniocerebral parameters offer a simplified approach to computer-aided stereotactic neurosurgery.
• The developed formula and table enhance the accuracy of subcortical target localization.
• This method reduces the need for ventricular air-filling, potentially improving patient safety and procedural ease.