Participants underwent thin-section, chest CT at full inspiration and expiration in the supine position. All chest CT examinations were performed using a Somatom Definition dual-source CT scanner (Siemens Healthcare, Forchheim, Germany) with the following parameters: 140 kVp, 100 mA, 09-1 beam pitch and 0.6 mm slice thickness. CT images were reconstructed with B30f.
Somatom definition dual source ct scanner
Manufactured by Siemens
Sourced in Germany
The Somatom Definition dual-source CT scanner is a medical imaging device manufactured by Siemens. It utilizes two X-ray sources and two corresponding detector arrays to capture images of the body. The core function of this equipment is to perform computed tomography (CT) scans, which produce detailed, cross-sectional images of internal structures.
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Lab products found in correlation
4 protocols using somatom definition dual source ct scanner
1
Thin-Section Chest CT Imaging
2
Atrial Volumes Measurement Techniques
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As a standard, all patients underwent a preprocedural computed tomography angiography (CTA) scan of the left atrium and right atrium using a SOMATOM Definition Dual Source CT scanner (Siemens, Munich, Germany). The shortest longitudinal atrial diameters (L) and end-systolic atrial area were measured on two- (A1) and four-chamber (A2) views of the CTA images using the Carestream version 11 software (Phillips, Amsterdam, The Netherlands). LA volume and RA volume (LAV/RAV ml) were calculated according to the following area-length method based on the literature (8/3π x [(A1) x (A2)/L]) [14 (link)–16 (link)]. Afterwards, the indexed LAV and RAV (LAVI/RAVI, ml/m2) were calculated based on the body surface area (BSA) of each patient. In addition, atrial volumes were also determined by the CARTO® 3 electroanatomical mapping system (Biosense Webster Inc., Diamond Bar, California, USA), based on the maps acquired by the fast anatomical mapping (FAM).
3
CT Scanning Protocol for Research
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All patients were scanned on a SIEMENS SOMATOM DEFINITION DUAL SOURCE CT scanner (manufacturer: SIEMENS) with a tube voltage of 120 kV and a tube current of 50–800 mA. The nominal slice thickness was 1 mm.
4
MDCT Imaging of Abdominal Aorta Contrast Enhancement
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In this study, 21,745 individuals underwent MDCT consisting of precontrast, arterial, and portal phases. CT scans were obtained using one of the following commercially available MDCT scanners: LightSpeed Ultra 8-channel CT scanner (GE Healthcare, Milwaukee, WI) and Somatom definition dual-source CT scanner (Siemens Medical Solutions, Malvern, PA). The images with 3-mm thick sections were acquired. Using a power injector (Multilevel CT; Medrad, Pittsburgh, PA), 120 mL of nonionic contrast material (Iopromide, Ultravist 370; Schering, Berlin, Germany) was administered at a rate of 3 mL/s through an 18-gauge, plastic, intravenous catheter placed in an antecubital vein, followed by a 20 mL flush of sterile saline. For arterial phase imaging, the scanning delay was determined using an automatic bolus tracking technique provided by the CT manufacturer. Contrast enhancement was automatically calculated by placing the region-of-interest cursor over the vessel of interest, that is, the abdominal aorta, and the level of the trigger threshold was set at an increase of 100 Hounsfield units.
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