Figures & data
Figure 1. Quantitative CT measurements of emphysema. A three-dimensional rendering of the lung registered to the three dimensional reconstruction of the airway tree (A), two-dimensional axial CT image with the CT densitometry values below −950 HU highlighted in red (B), and the three-dimensional low attenuation cluster analysis of emphysema with colored regions represented as connected regions of the lung with CT densitometry values below −950 HU registered to the three-dimensional reconstruction of the airway tree (C) for a COPD subject. Images A and C were generated using Apollo image analysis software (VIDA Diagnostics, Coralville, IA) and Image B was generated using MATLAB R2007b (The Mathworks, Natick, MA).
