Table 1. Diagnosis of idiopathic pulmonary fibrosis based on patterns discovered in high-resolution computed tomography (HRCT) and histopathology investigations.

HRCT pattern	Histopathology pattern
	UIP	Probable UIP	Possible UIP	Non-classifiable fibrosis	Not UIP
UIP	Yes	Yes	Yes	Yes	No
Possible UIP	Yes	Yes	Probable	Probable	No
Not UIP	Possible	No	No	No	No

UIP: usual interstitial pneumonia.