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Using a 3D Radiological Planning Software to Predict the Intraoperative Surgical View.

Adrian Felix Balciunas¹, Annika Gebel¹, Jonghui Kim¹

¹Department of Otorhinolaryngology and Head and Neck Surgery, University of Witten/Herdecke, St.-Josefs Hospital Hagen, Hagen, Germany.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology

|May 27, 2025

Summary

This summary is machine-generated.

This study found that 3D radiological planning software accurately predicts the necessary posterior tympanotomy (PT) opening length for cochlear implant surgery, aiding in round window (RW) visualization. The software assists in anticipating RW visibility, improving surgical planning.

Keywords:

Cochlear implant Surgical anatomy Temporal bone

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Area of Science:

Neurosurgery
Medical Imaging
Otolaryngology

Background:

A novel 3D radiological planning software for otology aids preoperative planning using CT/MRI scans.
The software provides anatomical measurements for cochlear implant candidates.

Purpose of the Study:

To evaluate the software's usability in predicting posterior tympanotomy (PT) opening length.
To ensure adequate visualization of the round window (RW) during cochlear implant surgery.

Main Methods:

CT scans of 30 petrous bone specimens were analyzed.
Correlations were assessed between software-calculated distances and intraoperatively measured PT opening length (PTW).
Facial nerve exposure and electrode insertion feasibility were also analyzed.

Main Results:

The mean PTW length was 7.31 mm.
Intraoperative PTW significantly correlated with software-calculated distances to the chorda tympani and facial nerve, and facial recess size.
Electrode insertion was feasible in all specimens.

Conclusions:

The 3D software is a valuable tool for preoperative planning in cochlear implant surgery.
The software assists in anticipating RW visualization, potentially through the chorda-facial angle.