Computerized estimation of the lung volume removed during lung volume reduction surgery

Area of Science:

• Thoracic Surgery
• Medical Imaging
• Quantitative Analysis

Background:

• Lung volume reduction surgery (LVRS) is a treatment for severe emphysema.
• Accurate measurement of resected lung volume is crucial for assessing surgical outcomes.

Purpose of the Study:

• To develop an automated method for estimating lung volume removed during LVRS using computed tomography (CT).
• To provide an objective measure for investigating the relationship between lung volume removed and patient outcomes.

Main Methods:

• Analysis of CT scans from six patients undergoing bilateral LVRS.
• Development of an automated computer scheme using CT voxel values and resected lung specimen weight.
• Evaluation of computed lung volume removed across simulated surgical planes and CT reconstruction kernels.

Main Results:

• A linear correlation was found between the computed fraction of lung volume removed and resected lung tissue weight (r=0.697, P=.012).
• Computed lung volume removed ranged from 12.9% to 51.7%, significantly differing from surgeons' estimates (30%-33%).
• Mean absolute difference between computed and surgeon estimates was 29.7%.

Conclusions:

• The developed quantitative model offers an objective measure of lung volume removed during LVRS.
• This automated CT-based method can potentially improve the understanding of LVRS efficacy.