Which of the following chest projections/positions would best demonstrate fluid in the right lung?
AP supine
PA upright
left lateral decubitus
lateral
PA upright
Rationale: Air-fluid levels will be best demonstrated with upright positioning or horizontal beam use during decubitus positions. Supine imaging will not allow a fluid line to develop. Lateral chest imaging isn't the most ideal to isolate fluid in a single lung because of right and left lung superimposition.
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