Before surgery, all patients underwent CTA examination of the left atrium using a 64‐slice SOMATOM definition flash dual‐source computed tomography (CT) scanner (Siemens). The temporal resolution was 330 ms and, the detector collimation was 64 × 0.6 mm. Iodixanol diluted with normal saline was injected through the elbow vein at the rate of 5 ml/s as the contrast agent. Following injection, scans were performed after a delay of 60 s to ensure adequate circulation of the contrast agent. Images of the left atrium were obtained in the end‐diastolic phase. The LAA orifice diameter was measured in the coronal, sagittal, and transverse positions, and the maximum value was recorded as the CTA measurement (Figure 1H–J ). All images were analyzed by two independent, experienced radiologists. The average value of the measurement was taken as the result.
Somatom definition flash dual
Manufactured by Siemens
Sourced in United Kingdom
The SOMATOM Definition Flash is a dual-source computed tomography (CT) scanner developed by Siemens. It is designed to provide high-quality imaging with fast scanning speeds.
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Lab products found in correlation
2 protocols using somatom definition flash dual
1
Measuring Left Atrial Appendage Diameter via CTA
2
Preoperative CT Examination Protocol
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All 62 patients received preoperative CT examination before surgery. CT examination was performed on a GE Light speed 64 slice spiral CT (GE Medical System, Chalfont St Giles, UK) or a Siemens Somatom Definition Flash dual-source CT (Siemens, Erlangen, Germany), with tube voltage of 120 kV, tube current of 200–300 mAs. The collimator width was 0.625 and 0.60 mm, respectively; the pitch was 1.0; the slice thickness of reconstruction was 3 mm; the interlayer distance was 3 mm.
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