<num>. diffuse interstitial opacities with a bilateral lower lobe predominance, thought to be at least partially attributable to mild-to-moderate interstitial pulmonary edema. a coinciding underlying interstitial abnormality could be considered as well, however. correlation with any prior imaging is recommended to assess the degree of change from the patient's baseline. although doubted, an atypical infectious process cannot be completely excluded to explain a widespread interstitial abnormality. <num>. mild cardiomegaly.