Figure 2
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F2193-1801-2-101/MediaObjects/40064_2012_Article_162_Fig2_HTML.jpg)
Serial chest HRCT images in relation to the suspected AE-IPF. HRCT performed during the exacerbation (c) and (d) demonstrates diffuse ground glass opacity with marked progression of the underlying fibrosis and honeycombing compared with 3 months prior (a) and (b).