Syngo ct workplace 2012b

The DECT scans were performed using a SOMATOM Definition Flash CT scanner (Siemens Healthcare GmbH, Erlangen, Germany) with tube voltages of 100 and 140 kVp and a fixed current of 324 mA for both tubes. The dosage was 2.3 ± 0.1 mSv. This was a standard DECT protocol recommended by the vendor. The datasets were reconstructed with 1 mm slice thickness, 0.8 mm increment, H40f medium kernel, base orbit window, and a 200-mm field of view. A 50 % to 50 % weighted standard “brain window” (BW) series was reconstructed (slice thickness: 4 mm, increment: 4 mm, kernel: H30f medium smooth, field of view: 200 mm). Corresponding iodine map (IM) series and virtual non-contrast (VNC) series were reconstructed using the post-processing software “Brain Hemorrhage” (syngo CT Workplace 2012B, Siemens Healthcare GmbH, Erlangen, Germany). A H30f medium smooth kernel was also used for this.

As part of the standard care for patients with suspected cerebrovascular injury, DECT angiography (DE-CTA) included precontrast, arterial phase, and venous phase (45-second delay) images. All DE-CTA images were obtained using a dual-source multidetector-row CT scanner (Somatom Definition Flash 128-slice dual-source scanner; Siemens Healthcare, Forchheim, Germany). DE-CTA (DE-CTA) images were acquired from the skull base to the vertex and underwent detailed image parameters of precontrast, arterial, and 45-second delayed phase images (100/140 kVp, 110/110 ref. mAs; slice thickness, 0.6 mm; dose-length product [DLP], 392 mGy cm). Patients were injected with 80–100 mL intravenous contrast media (Omnipaque, 350 mg/100 mL; GE Healthcare, Piscataway, NJ, USA). Based on the obtained dataset, conventional-like images similar to the usual 120 kVp single-energy acquisition were generated from precontrast, arterial, and venous phase images. The iodine map series and virtual noncontrast (VNC) images were reconstructed using a Brain Hemorrhage post-processing software (Syngo. CT Workplace 2012 B, Siemens Healthcare GmbH; Erlangen, Germany). Fusion images were generated by registration and overlay of the iodine map with conventional-like mixed images. Subsequently, a follow-up precontrast brain CT was performed within 72 h, depending on the patient’s condition, to evaluate HE.