Rubens, D J Sonographic guidance of mediastinal biopsy: an effective alternative to CT guidance. [electronic resource] - AJR. American journal of roentgenology Dec 1997 - 1605-10 p. digital Publication Type: Journal Article ISSN: 0361-803X Standard No.: 10.2214/ajr.169.6.9393174 doi Subjects--Topical Terms: Biopsy, Needle--economicsCost-Benefit AnalysisFemaleHumansMaleMediastinal Diseases--diagnostic imagingMediastinal Neoplasms--diagnostic imagingMiddle AgedRetrospective StudiesTomography, X-Ray ComputedTriageUltrasonography, Interventional--economics