Morphologic measure of retrosigmoid approach using volume rendering with thin-section computed tomography.

Area of Science:

• Neurosurgery
• Radiology
• Anatomy

Background:

• The jugular foramen and internal auditory pore are critical anatomical structures.
• Understanding their spatial relationships is vital for neurosurgical procedures.
• The retrosigmoid approach requires precise knowledge of these landmarks.

Purpose of the Study:

• To investigate the jugular foramen, internal auditory pore, and their connecting points.
• To utilize imageological methods for detailed anatomical research.
• To establish a theoretical foundation for the retrosigmoid surgical approach.

Main Methods:

• Computed tomographic (CT) scans of 100 adult hip cases were reconstructed.
• Key measurements included angles (α, β) and distances (AC, AB, BC, shortest distance).

Main Results:

• Angle α measured 39.50° (±4.74°), angle β measured 46.35° (±5.51°).
• Distances AC, AB, and BC were measured as 44.94 mm (±3.84 mm), 43.68 mm (±4.56 mm), and 6.15 mm (±2.04 mm) respectively.
• The safe distance was measured at 5.21 mm (±0.23 mm).

Conclusions:

• The quantitative data obtained aids in locating these anatomical structures.
• Measurements provide essential references for surgical planning and execution.
• This research supports improved outcomes for retrosigmoid surgeries.