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The advantages of ultrasound imaging include bedside availability and the relative ease of performing repeated examinations. Imaging is real-time and free of harmful radiation. There are no documented side effects and discomfort is minimal. Despite the absence of randomized, controlled trials, ultrasonographic guidance for interventional procedures in the thorax is likely to improve diagnostic yield and reduce complications by providing visual guidance.[60] Bedside ultrasonography enables clinicians who understand the clinical context of patients to perform the most appropriate scans directed to address clinically relevant questions.

The disadvantages of ultrasonography are primarily related to the fact that it is heavily operator-dependent. Retrospective review of images provides only limited quality control. There is no scout scan to give a global picture for orientation. In addition, the basic ultrasound evaluation cannot determine the exact …