Lung

On my CT it found a linear area of increased attenuation in the right lower lobe and that it would be consistent with subsegmental atelectasis or fibrosis. Could someone please explain what that means.

[National Jewish Health]

This is a common finding and almost always of no consequence to your health.  Your best bet would be to rely upon the opinion of a lung specialist, also called a pulmonologist.

[Apocalipsis]

A related discussion, lung linear fibrosis was started.