Value of Volumetric Data Acquisition in Expiratory High-Resolution Computed Tomography of the Lung

Abstract

Volumetric expiratory HRCT allows for better identification of the airway conducting to the areas of air trapping compared with noncontiguous images as well as additional findings of diagnostic significance.

Paired Inspiratory/Expiratory Volumetric Thin-Slice CT Scan for Emphysema Analysis

“…All patients, even GOLD IV patients, were able to hold their breath during inspiration and expiration for the study as the longest examination time was as short as 13 s. Until now, the evaluation of the advantage of those 3D data sets comprised just the visual assessment of airtrapping. 20 The use of volumetric and advanced 3D analysis approaches for the segmentation and classification of different LVs, and the assignment to different emphysema clusters is unique in the literature.…”

“…18 This technique is particularly sensitive for the detection of diffuse lung diseases such as bronchiectasis, bronchial asthma, and bronchiolitis obliterans. 20 In some subjects, the inspiratory HRCT scan might give a false-positive finding for emphysema when the hyperaeration observed at inspiration is no longer observed at expiration. Therefore, expiratory HRCT scans have been reported 21,22 to be superior for quantitating emphysema and showed better correlation with PFTs than inspiratory scans.…”

Combined radiological diagnosis of chronic obstructive pulmonary disease

“…Экспираторная КТВР позволяет точнее оцени вать проводимость воздухоносных путей к участкам легкого, содержащим воздушные ловушки. Наибо лее информативными для оценки ПЛТ являются участки легких на уровне бифуркации трахеи (95 %) и дуги аорты (93 %), в меньшей степени -в базаль ных отделах (83 %) [24].…”