Consolidation vs Collapse on Chest X-ray

A 65-year-old male presents with fever, cough with purulent sputum, and pleuritic chest pain. A chest X-ray reveals a dense, homogenous opacity in the right lower lobe, obscuring the right hemidiaphragm, with an air bronchogram. What is the most likely diagnosis?

Which of the following is a characteristic radiological sign of alveolar consolidation on a chest X-ray?

A patient undergoes a CT scan for persistent cough and fever. The scan shows an area of increased lung attenuation with preservation of lung volume, air bronchograms, and ill-defined margins. Which of the following statements regarding this finding is most accurate?

Which of the following conditions is LEAST likely to present as a typical lobar consolidation on chest imaging?

A patient with a history of aspiration develops a dense consolidation in the superior segment of the right lower lobe. Despite appropriate antibiotic therapy, follow-up imaging after two weeks shows a persistent consolidation with a new air-fluid level within the opacified area. What is the most likely complication?