Septic emboli

*diagnosis may be first suggested at chest CT as abnormalities may be seen on CT even before blood cultures become positive

     CXR and CT appearance-
1) Multiple pulmonary opacities - may occur in any portion of lung (but usually maximal in lower zones)
-Either round (nodular) in shape or wedge shaped densities based on pleura and pointing towards hilum (like an infarct)
-Frequently cavitate
Air bronchograms frequently seen in all types of opacity including nodular lesions on CT

2) feeding vessel sign-
  Common CT finding of both sterile and infected infarcts
  It is a distinct vessel leading to apex of  a peripheral area of consolidation
  Not specific for embolic sequelae  but seen more frequently with septic emboli and sterile thrombo-embolic infarctions than in other conditions

3) Pleural effusion and empyema - common features