The PA (posterior-anterior) film is obtained with the patient facing the cassette and the x-ray tube 6 feet away. This distance diminishes the magnification of structures closer to the x-ray tube. Heart is close to normal size as possible.
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It's a good example of what he called cross-domain expansion, merging field artillery and air defense artillery platforms. Cross-domain expansion uses existing platforms in new ways, Rossi said, and is an important part of the Army Operating Concept. A battle-tested example of this is the C-RAM, he said.