 Computed tomographic pulmonary angiography A thoracic CT scan was performed using a 16-detector multi-sectional CT scanner Somatom Emotion 16-slice; CT2012E-Siemens AG, Berlin and München-Germany by injecting contrast agents intravenously, while the patient held her breath. Contrast-enhanced images were obtained 50-70 sec after IV administration of 120 ml of ionic iodinated contrast agent, iodiksanol Visipaque 320 mg100 ml, Opakim using a power injector at a rate of 2 mlsec. 