40 year old farmer female reports with severe exertional dyspnoea ,worsening over past 2 months,patient is hypoxic ,SaO2 -74 % on room air. She is on ATTfor last two months prior to this CT, ATT was started as X ray had showed some infiltrates. Sputum AFB was not attempted.

She has shown no improvement on ATT.clinically there is no clubbing .There are bibasal rales .

What are the radiological findings? What is the likely diagnosis?

Radiologically there is some ground glass opacification,There are areas of traction bronchiectasis but the most striking are lot of noduar densities in cebtrilobular distribution.Most likeky diagnosis is hypersnsitivity pneumonitis.