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Updated: May 20, 2026
07:31
Image Acquisition using Portable Sonography for Emergency Airway Management
Published on: September 28, 2022
A new method for determining the optimal CT threshold for extracting the upper airway.
1Department of Oral and Maxillofacial Surgery, Yamaguchi University Graduate School of Medicine, Minami-kogushi 1-1-1, Ube City, Yamaguchi 755-8505, Japan.
Dento Maxillo Facial Radiology
|July 31, 2012
Summary
This study determined the optimal upper threshold for airway extraction using the calculation of CT value disparities (CCTD) technique. The ideal range for airway segmentation was found to be -460 to -470 HU.
Area of Science:
- Medical Imaging
- Radiology
- Anatomy
Background:
- Accurate segmentation of airways in medical imaging is crucial for diagnosis and treatment planning.
- Previous methods for determining airway thresholds have limitations in precision.
Purpose of the Study:
- To evaluate optimal upper threshold levels for airway extraction.
- To determine the most suitable upper threshold for airway segmentation using a novel technique.
Main Methods:
- Utilized a phantom model and ten female patients with jaw deformities.
- Employed the "calculation of CT value disparities" (CCTD) technique to determine optimal threshold levels.
- Calculated mean CT values along air space and soft tissue lines to find the maximal difference at the air-space border.
Main Results:
- Phantom hole optimal upper thresholds were -434 HU (front-on) and -456 HU (side-on).
- The optimal upper threshold for patients was -472 HU.
- No error values for volume measurements were observed between -460 HU and -470 HU.
Conclusions:
- The most suitable upper threshold level for extracting the airway is between -460 HU and -470 HU.
- The CCTD technique provides a precise method for determining airway segmentation thresholds.
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