CT for Assessment of Ventilation Distribution
The assessment of ventilation distribution is an important clinical parameter for many respiratory disorders. It yields additional information compared to pulmonary function tests, as morphological changes and regional distribution of disease can be visualized. Furthermore, dynamic assessment using paired inspiratory and expiratory imaging is capable of predicting lung function. Thus, ventilation computed tomography (CT) aims to determine the distribution of inspired air in a quantitative, time-resolved and regional fashion. The amount of air in the distal airways will result in changes in density, allowing quantification of air distribution on a regional basis and the assessment of small airway diseases as in spired air becomes trapped at expiration. It is this additional information that makes imaging of ventilation distribution so valuable.
KeywordsPulmonary Function Test Spiral Compute Tomography High Resolution Compute Tomography Dynamic Compute Tomography Electron Beam Compute Tomography
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