Somatom force dual source mct system

The CCTA was acquired the same day as the PET scan for 13 patients, while the remaining cases (n=10) had the CCTA within 21 days (range=2–21 days). All patients were scanned with arms positioned above the head in a 192-slice Somatom Force Dual Source mCT system (Siemens Healthineers, Knoxville, TN, USA). The CCTA imaging parameters included prospective gating, 250 ms rotation time, body-mass index (BMI) dependent voltage (<25 kg/m², 100 kV; ≥25 kg/m², 120 kV), and tube-current time product of 160–245 mAs. Patients were administered beta-blockers (orally or intravenously) to achieve a target heart rate of <60 beats/min, followed by a BMI-dependent bolus-injection of contrast media (400 mg/mL) with a flow of 5–6 mL/s after determining the appropriate trigger delay defined by a test bolus of 20 mL of contrast material.

Thirteen of the twenty-three patients had coronary CTA acquired on the same day as the ¹⁸F-NaF PET/CT examination, while the remaining ten patients had their CTA images acquired within 21 days (range=2–21 days). CTA images were acquired using prospective ECG-gating during an inspiratory breath-hold on a 192-slice Somatom Force Dual Source mCT system (Siemens Healthineers, Knoxville, TN, USA), with patients instructed to elevate their arms above the head. The CTA imaging parameters have been described previously^{11 (link)}. In brief end-systolic prospective gating was utilized. The dose administered to the patients from the CTA was 8mSv.