Infection
Aspergillus
Candida
Candida
Inflammation
Malignancy
Halo Sign Around a Malignant Mass
Mechanical/Atelectasis
Trauma
Pulmonary Hemorrhage Hematoma Fissural Displacement
Halo Sign – Surrounding Ground Glass Changes
Metabolic
Circulatory- Hemorrhage
Immune
Immune Deficiency CLL Likely Infection
Infiltrative Idiopathic Iatrogenic Idiopathic