Marks, W M Real-time evaluation of pleural lesions: new observations regarding the probability of obtaining free fluid. [electronic resource] - Radiology Jan 1982 - 163-4 p. digital Publication Type: Journal Article ISSN: 0033-8419 Standard No.: 10.1148/radiology.142.1.7053526 doi Subjects--Topical Terms: DrainageHumansPleural Diseases--diagnosisPleural Effusion--diagnosisUltrasonics--methodsUltrasonography