Air trapping is a prominent finding in small airway disease (SAD)
of the lungs. To investigate the feasibility of accurate, automated assessment of air-trapping from low-dose CT, we compare visual scoring by expert radiologists to a conventional method of automated assessment as well as two novel methods. The conventional method,
the "density mask" method, has been reported to correlate
weakly but significantly with visual scoring on normal-dose CT.
While we were unable to reproduce these results on our low-dose scans, our two novel methods showed some promise. More study on larger data sets is required to determine the optimal analysis method.