MIRA2002 Study Guide - Final Guide: Scoliosis, Costodiaphragmatic Recess, Mediastinum

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Document Summary

Area covered: lungs fields, apices, costophrenic angles, heart. Collimation: centre: t7 thoracic vertebra, shutter a: open to show the lung apices superiorly and the costophrenic angles inferiorly, shutter b: open to show the lung fields laterally. Exposure: there should be adequate exposure so that; the ribs and thoracic vertebrae are seen faintly through the heart, vascular lungs markings are shown. Where possible a pa erect should be done instead of the ap supine view. The ap supine chest view is taken when the patient is unable to be safely moved into the upright position. Differences or disadvantages of the ap supine chest view are: lung fields are shortened the heart is magnified the ribs may appear more horizontal air-fluid levels are not seen the clavicles are projected higher up. The ap view shows magnification of the heart and widening of the mediastinum because they are anterior structures. Area covered: lung fields, apices, costophrenic angles are shown.