![]() ![]() The supine position results in physiological widening of the cardiomediastinal outline including superior mediastinum, as well as congestion of the pulmonary veins with upper lobe venous diversion It can be performed with the patient sitting up on the bed and even performed outside the radiology department using a mobile x-ray unitĪdvantages: more convenient for intubated and sick patients who will not be able to stand for a PA projectionĭisadvantages: mediastinal structures may appear magnified as the heart is further away from the detector, often poorly inspired, more likely to be rotated and to create skin folds, scapulae often cover some of the lungsĪ AP supine view is a further alternative frontal projection technique often used in trauma patients, or patients who can't sit up The anteroposterior (AP) erect view is an alternative frontal projection to the PA projection with the beam traversing the patient from anterior to posterior It is the best general radiographic technique to examine the lungs, bony thoracic cavity, mediastinum and great vesselsĪdvantages: technically excellent visualization of the mediastinum and lungs, with accurate assessment of heart sizeĭisadvantages: patient must be able to stand erect It is performed standing and in full inspiration with the patient hugging the detector to pull the scapulae laterally The x-ray beam traverses the patient from posterior to anterior The posteroanterior (PA) view is the standard frontal chest projection ![]()
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