Somatom definition or force

Given the duration of the period of investigation, different CT scanners and protocols were used. Our current CTA protocol is performed with a 128- or 384-detector row scanner (Somatom Definition or Force, Siemens, Erlangen, Germany) with a scan range from the apex of the lung to its base.
Approximately 80 to 100 mL of contrast agent (Omnipaque 300 mgI/mL; GE Healthcare, Oslo, Norway) is injected at 4 mL/s through the antecubital vein, followed by 30 mL (2 mL/s) of saline solution.
Automatic bolus-triggering software is used, with a circular region of interest positioned at the level of the pulmonary trunk for pulmonary artery evaluation and at the level of the descending aorta for systemic artery evaluation. Post-processing is performed on conventional dedicated software.

Electrocardiogram-gated MDCT examinations were performed with a 128-slice or a 384-slice dual-source scanner (SOMATOM® Definition or Force; Siemens Healthineers, Forchheim, Germany) as previously described [13 (link)]. Reconstructions were carried out using a cardiac-gated B26f or I26f algorithm with a slice thickness of 0.6 mm in systole at 35% and in diastole at 70% of the cardiac cycle [12 ].