chest x-ray - appear as sharply described round or lobulated densities within the lung parenchyma. Dilated (feeder) vessels may be observed connecting the malformation to the hilum
Valsalva and Muller manoevures - size of lesion changed by alteration in intrathoracic pressure during fluoroscopy; can suggest the diagnosis
CT scanning with bolus contrast injection and rapid sequence imaging - accurate method of diagnosis
pulmonary angiography - method of choice; necessary to confirm the diagnosis
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