This document provides instructions for performing a supine chest x-ray on a patient lying on a stretcher. It describes adjusting the patient's position, placing the x-ray cassette and grid behind their back, positioning the x-ray tube, giving exposure instructions, and completing the exam by returning the patient to a comfortable position and cleaning the equipment. Key steps include adjusting the patient by pulling them toward you while gripping the sheet, placing a lead shield on the patient before returning to the control panel, and exposing at 115 kVp and 12.5 mAs for a sthenic or average body type.
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