The study was performed using three CT-scanners: Canon Aquilion Prime (Canon Medical Systems Corporation, Otawara Tochigi, Japan), GE Revolution CT (GE Healthcare, Waukesha, WI, USA) and Siemens Somatom Flash (Siemens Healthcare GmbH, Erlangen, Germany). All scans were performed using standard clinical chest protocols, with and without organ based tube current modulation. The technical settings for the scan protocols are listed in table 2. The scanners were all calibrated according to department quality assurance protocols and the scans were repeated five times at each setting to allow averaging of dose measurements and to compensate for generator instability, tube fluctuations and variation in X-ray tube position during helical rotations.
Somatom flash
Manufactured by Siemens
Sourced in Germany, United States
The Somatom Flash is a computed tomography (CT) scanner manufactured by Siemens. It is designed to capture high-quality images of the human body. The Somatom Flash utilizes advanced imaging technology to provide detailed visual information for medical diagnostic purposes.
Automatically generated - may contain errors
Lab products found in correlation
Somatom force, by Siemens (7 mentions)
Ultravist, by Bayer (3 mentions)
Somatom sensation, by Siemens (2 mentions)
Ge revolution ct, by GE Healthcare (1 mentions)
Aquilion prime, by Canon (1 mentions)
Iomeron, by Bracco (1 mentions)
Syngo via workstation, by Siemens (1 mentions)
Somatom emotion, by Siemens (1 mentions)
Revolution ct, by GE Healthcare (1 mentions)
Somatom drive, by Siemens (1 mentions)
Ultravist 370 mg 1 ml, by Bayer (1 mentions)
Optima 660, by GE Healthcare (1 mentions)
Ict sp 128 slice, by Philips (1 mentions)
Discovery hd 750, by GE Healthcare (1 mentions)
3.0 t mri, by GE Healthcare (1 mentions)
Magnetom aera, by Siemens (1 mentions)
Hd750, by GE Healthcare (1 mentions)
Iopamiro 300, by Bracco (1 mentions)
Iomeron 400 mg ml, by Bracco (1 mentions)
Aquilion one, by Toshiba (1 mentions)
35 protocols using somatom flash
1
Multi-Scanner CT Dose Optimization
2
High-Pitch Dual-Source CT Cardiac Imaging
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A 128 slice high pitch capable dual source computed tomography scanner (Siemens Somatom Flash, Siemens Healthcare, Forchheim, Germany) was used for all experiments. The high pitch scans were performed using a dedicated high pitch cardiac protocol (dual source, 100 and 120 kV, 320 mAs/rot, pitch 3.4, prospective ECG trigger, collimation 128 × 0.6 mm, FoV 190 × 190 mm, scan length 90.0 mm, rotation time 0.28s) and a retrospectively ECG gated protocol (100 and 120 kV, 320 mAs/rot, retrospective ECG gating after pulsing at 50-100%, collimation 128 × 0.6 mm, pitch 0.19, rotation time 0.28s). Reconstructions were performed according to the vendor’s specifications, identically for both modes with B26f, B46f, B70f standard kernels and iterative I26f and I70f kernels with a field of view of 190 × 190 mm and slice thicknesses of 0.6 mm (B26f, B46f, B70f) and 0.75 mm (I26f, I70f) avoiding undersampling of the acquired data.
3
Long-term Coronary Graft Patency Evaluation
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The first follow-up at a mean of 36 months was performed with conventional angiography in 99 patients (92%). The second and current follow-up was performed at 97 months using computed tomography (CT) angiography with a Somatom Flash dual-source CT scanner (Siemens, Erlangen, Germany). All subjects received 0.25 mg of nitroglycerin sublingually. Those with a heart rate >70 bpm and no contraindications were also given up to 10 mg of metoprolol intravenously before the examination. Contrast media (60-70 mL of Iomeron 400 mg/mL; Bracco, Milan, Italy) was administered with a pressure injector at a flow rate of 6 mL/s, followed by a 60-mL saline bolus. Scanning started at the left subclavian artery and ended at the base of the heart. The images were reviewed on a Siemens SyngoVia workstation. All images were independently reviewed by 2 thoracic radiologists who were blinded to group assignment. Disagreements were resolved by consensus. Where possible, the studies were compared with reports and images from previous coronary angiographies. A graft was judged as occluded when the graft was not opacified by contrast media. Graft stenosis was deemed significant when the narrowing of the lumen diameter was >50% relative to the adjacent parts of the vessel.
4
CT Imaging for CRC Evaluation
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Computed tomography (CT) examinations were performed with a multi‐detector CT scanner (Somatom Emotion or Somatom Flash, Siemens Healthineers, Erlangen, Germany) as part of standard CT protocols for CRC patients. CT scans were analyzed by the respective on‐call radiologist and reviewed by a consultant radiologist. Imaging studies were reviewed according to Response Evaluation Criteria in Solid Tumors (recist ), version 1.1 [29 (link)], and a clinical significant response was defined as a complete response (CR), partial response (PR), or stable disease (SD).
5
Dual-Energy CT Renal Imaging Protocol
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The Force CT (Somatom Force, Somatom Flash dual-source CT, Siemens, Germany) was used to perform the scan. Patients were instructed to hold their breath, fast for 4 hours before the procedure, and drink 500 ml of warm water before the scan. The non-ionic intravenous contrast (300 mg iodine/ml) was administered to all patients at a flow rate of 3.5 ml/sec, based on their weight (1.2 mL/kg body weight). The delay time of arterial phase (renal cortical phase) and venous phase (renal medullary phase) was 30 and 80 s, respectively. Additionally, the dual-energy mode and automatic exposure system were utilized with tube voltages of 100 kVp and Sn150 kVp, and tube currents of 130-180 mAs and 80-90 mAs, respectively.
6
Standardized CT Imaging Protocol
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This article is protected by copyright. All rights reserved Stavanger patients were scanned on the Siemens Somatom Flash CT-system. Patient position and scan FOV were the same as for Odense patients. 120 kV tube potential was used, and though the Siemens automatic tube current control system is different, the current was chosen to give similar visual image noise-levels.
Images were reconstructed with I50/s Kernel using 1 mm thickness in head and neck, and 2 mm thickness in chest, abdomen and thighs. Both regions were reformatted using double thickness in sagittal and coronal planes.
Images were reconstructed with I50/s Kernel using 1 mm thickness in head and neck, and 2 mm thickness in chest, abdomen and thighs. Both regions were reformatted using double thickness in sagittal and coronal planes.
7
Dual-Source CT Coronary Angiography Protocol
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All data were acquired on a dual-source computerized tomography (CT) scanner
(SOMATOM Flash or SOMATOM Force, Siemens Healthineers, Erlangen, Germany). All
acquisition and reconstruction protocols (spiral, sequential, or high pitch
spiral flash) adhered to the society of Cardiovascular Computed Tomography
guidelines for the performance and acquisition of coronary computed tomographic
angiography. Our CT laboratory clinical routine includes an initial calcium
score scan followed by CTA.
(SOMATOM Flash or SOMATOM Force, Siemens Healthineers, Erlangen, Germany). All
acquisition and reconstruction protocols (spiral, sequential, or high pitch
spiral flash) adhered to the society of Cardiovascular Computed Tomography
guidelines for the performance and acquisition of coronary computed tomographic
angiography. Our CT laboratory clinical routine includes an initial calcium
score scan followed by CTA.
8
Standardized Cardiac Imaging Protocol
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Image acquisitions were performed using 2 different vendors (Somatom Flash, Siemens Healthineers, Germany; Revolution CT, GE Healthcare, USA). Patients with heart rate ≥70 beats/min were given oral beta-blockers. Each patient received sublingual nitroglycerin before electrocardiograph (ECG)-triggered CACS scan and CCTA scan. The region of interest was located in the ascending aorta and a bolus-tracking technology was used, with contrast media (Ultravist, Bayer, Germany; Iodixanol, Nycomed, Norway) administered. Detailed scan parameters were displayed in Supplementary Table 1 .
Iterative reconstruction was applied to reconstruct CCTA images, with ECG editing used if necessary, and CCTA analysis used the phase with the optimal image quality.
Iterative reconstruction was applied to reconstruct CCTA images, with ECG editing used if necessary, and CCTA analysis used the phase with the optimal image quality.
9
Cardiac CT Imaging Protocol for Renal Function
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An electrocardiographically gated multidetector CT study was performed only if the patient’s renal function was considered satisfactory, as is routine clinical practice; this was generally when the serum creatinine was ≤ 2.0 mg/dL. Patients were evaluated using a Siemens Somatom Cardiac 64 or Siemens Somatom Flash scanner (Siemens Medical Solutions USA, Inc., Malvern, PA) using collimation of 0.6 mm at a fixed pitch of 0.2 with an injection of 50 to 110 mL of iopamidol (Isovue-370). A dedicated protocol was formulated, with 120 kV and tube current modified according to the patient’s size. Image acquisition was, for the most part, performed with retrospective electrocardiographic gating. CT Digital Imaging and Communications in Medicine (DICOM) data were analyzed by a dedicated advanced imaging core laboratory using TeraRecon Aquarius software (San Mateo, CA).
10
Comprehensive Cardiac Imaging with BSM
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All patients underwent a non-contrast computed tomography scan of the chest after BSM recordings with the array of BSM electrodes in situ (SOMATOM Flash, dual-source scanner, 128-slice; Siemens Healthineers, Erlangen, Germany). The resulting images were used subsequently for the reconstruction of patient-specific models, incorporating thorax, myocardial surface, blood cavities, and the 96 electrode positions of BSM.
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