The Effect of Lung Volume on the Size and Volume of Pulmonary Subsolid Nodules on CT: Intraindividual Comparison Between Total Lung Capacity and Tidal Volume

Overview

Journal Taehan Yongsang Uihakhoe Chi

Specialty Radiology

Date 2022 Oct 14

PMID 36238880

Authors

Hyunji Lee

Chansik An

Seok Jong Ryu

Affiliations

Soon will be listed here.

Abstract

Purpose: To examine the effect of lung volume on the size and volume of pulmonary subsolid nodules (SSNs) measured on CT.

Materials And Methods: A total of 42 SSNs from 31 patients were included. CT examination was first performed at total lung capacity (TLC), and a section containing the nodule was additionally scanned at tidal volume (TV). The diameter and volume of each SSN, as well as the cross-sectional lung area containing the nodule, were measured. The significance of the changes in measurements between TLC and TV within the same individuals was evaluated.

Results: The lung area and the diameter and volume of SSNs decreased significantly at TV by 12.7 cm, 0.5 mm, and 46.4 mm on average, respectively ( < 0.001), compared to those at TLC. Changes in lung area between TV and TLC were positively correlated with the change in SSN diameter ( = 0.027) and volume ( = 0.014). However, after correction (by considering the change in lung area), the changes in SSN diameter ( = 0.124) and volume ( = 0.062) were not significantly different.

Conclusion: SSN size and volume can be significantly affected by lung volume during CT scans of the same individuals.

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