Diffuse Ground glass infiltrates

This is a 57 year old black female who had been a smoker but stopped 1 yr ago . She complained of increasing shortness of breath over 1 year.  She had undergone PFT’s that showed reduced FVC (59%) predicted and FEV1 (72% predicted).  Her total lung capacity was 71 % predicted.  She was unable to do a diffusion capacity.  The intial chest radiograph was read as normal.  Representative images from her CT scan are above

Do you think this is an abnormal scan? Would you perform a diagnositic procedure? If abnormal, suggest a diagnosis compatible with the CT scan.

 

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