Somatom force ct

Manufactured by Siemens

Sourced in Germany

The SOMATOM Force CT is a high-performance computed tomography (CT) scanner developed by Siemens. It is designed to provide fast, accurate, and low-dose imaging for a wide range of medical applications. The SOMATOM Force CT features dual-source technology, which allows for efficient and high-quality image acquisition.

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Lab products found in correlation

Iodixanol, by GE Healthcare (2 mentions) Brilliance ict, by Philips (1 mentions) Iopromide, by Bayer (1 mentions) Revolution ct, by Siemens (1 mentions) Somatom definition 128 slice, by Siemens (1 mentions) Revolution ct, by GE Healthcare (1 mentions) Somatom definition, by Siemens (1 mentions) Ingenia 3.0t cx, by Philips (1 mentions) Magnetom skyra 3t scanner, by Siemens (1 mentions) Ultravist 300, by Bayer (1 mentions) Definition flash ct, by Siemens (1 mentions) Somatom sensation 64 slice spiral ct, by Siemens (1 mentions) Female balb c nude mice, by Charles River Laboratories (1 mentions)

21 protocols using somatom force ct

CT-based Tumor Segmentation Protocol

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Two CT systems were adopted for CT image acquisition: United Imaging uCT780 and Siemens SOMATOM Force CT. The parameters for CT image acquisition were as follows: 110–120 kV; 116–168 mAs; detector collimation: 192 × 0.6 mm or 160 × 0.25 mm; rotation time: 1.0 s; slice thickness: 1–2.5 mm; field of view: 250 × 250 mm; matrix: 512 × 512.
Axial venous phase CT images (DICOM format) were prepared for tumor segmentation. An open-source software ITK-SNAP (www.itk-snap.org) was applied for the three dimensional manual segmentation. Tumor region in each layer was outlined by a radiologist with 12 years of experience in head and neck cancer, and then validated by a senior radiologist with 20 years of experience in head and neck cancer. The regions of interest covering the entire tumor were used for subsequent feature extraction.

Wang F., Zhang B., Wu X., Liu L., Fang J., Chen Q., Li M., Chen Z., Li Y., Dong D., Tian J, & Zhang S. (2019). Radiomic Nomogram Improves Preoperative T Category Accuracy in Locally Advanced Laryngeal Carcinoma. Frontiers in Oncology, 9, 1064.

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Three-Phase CECT Imaging Protocol

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In center A, all patients were examined using a Philips Brilliance 256-slice helical CT scanner (Brilliance ICT, Philips, Netherlands) for three-phase CECT scans before surgery. In center B, all patients received preoperative CECT scans with multidetector row CT scanners (Somatom Force CT, Siemens, Germany). The scanning parameters were as follows: tube voltage 120 kV, variable tube current (160–600 mA) depending on the size of the patient, collimation 128×0.625 mm, rotation time 0.5 s, and layer thickness 1 mm. After unenhanced scanning, patients received approximately 65–75 mL of iopromide (350 mg I/mL, Bayer Medical, Berlin, Germany) through the cubital vein at 2.5–3.0 mL/s. CT scans of the arterial phase (AP), portal venous phase (PVP), and delay phase (DP) were performed at 25–30 s, 60–70 s, and 110–180 s after injection.

Wang F., Zhao Y., Xu J., Shao S, & Yu D. (2022). Development and external validation of a radiomics combined with clinical nomogram for preoperative prediction prognosis of resectable pancreatic ductal adenocarcinoma patients. Frontiers in Oncology, 12, 1037672.

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Automated Lung Cancer Nodule Analysis

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Each nodule was automatic segmented by running on lungCAD software (Siemens SOMATOM Force CT). Firstly, two thoracic radiologists (author 2 and author 3 with 8-years and 6-years of experience in chest imaging, respectively) who were blinded to the pathologic result independently placed the longest diameter of the lesion. Secondly, precise edge of the entire-tumor volume of interest (VOI) was autosegmented by lungCAD. Visually identified mismatching, blood vessels and the chest wall adjacent to the margin of nodule were manually adjustment. Three-dimensional longest diameter and other 7 morphological features were computed separately by lungCAD (Fig. 4).Figure 4

Example computed tomography (CT) images in a patient with stage IB lung adenocarcinoma. Axial longest diameter of the lesion was placed manually and the contour of entire-tumor volume of interest (VOI) was automatic segmented by LungCAD. Morphological features were extracted from the defined tumor contour on CT images.

Yuan M., Liu J.Y., Zhang T., Zhang Y.D., Li H, & Yu T.F. (2018). Prognostic Impact of the Findings on Thin-Section Computed Tomography in stage I lung adenocarcinoma with visceral pleural invasion. Scientific Reports, 8, 4743.

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Chest CT Imaging Protocol for COVID-19

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All patients underwent a chest CT examination and regular reexamination, with an interval range from 3 to 10 days. CT examinations were performed using a single inspiratory phase in 2 commercial multidetector CT scanners (GE Revolution CT or Siemens SOMATOM Force CT). All patients were in the supine position placed in the middle of the examination bed and raised arms on the head. The imaging parameters were as follows: a tube voltage of 120 kV, a tube current of 50 to 200 mA with automatic tube current modulation techniques, rotation time of 0.5 to 1.0 s, the pitch of 1.0 to 1.5, and acquisition section thickness of 1 mm. Lung window was built by high-resolution algorithm. Conventional image reconstruction: the images of 5 mm thick were reconstructed to images with lung window (window width: 1200–1500 Hu, window position: −750 to −650 Hu) and mediastinal window (window width: 300–350 Hu, window position: 50–70 Hu). Thin section image reconstruction: the images of 5 mm thick were rebuilt to thin section images (high resolution) with lung window (lung window algorithm, window width 1000–1500 Hu, window position −750 to −600 Hu).

Liang P., Wang R., Ren X.C., Huang W.P, & Gao J.B. (2021). Disease state prediction for 2019 novel coronavirus (COVID-19) pneumonia using CT manifestations and body temperature dynamic analysis: A SQUIRE-compliant study. Medicine, 100(27), e25938.

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Standardized Cardiac CT Angiography Protocol

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Each CCTA examination was conducted using a 3rd-generation dual-source CT manufactured by Siemens (SOMATOM Force CT, Germany). The procedure for the CCTA examination was as follows: (I) pre-scan preparation: to dilate the coronary arteries and reduce the respiratory motion artifacts, sublingual nitroglycerin spray was used on all patients, except hypotensive patients, and the patients were trained to hold their breath before the examination; (II) contrast injection: the contrast agent (30.0–55.0 mL of non-ionic iohexol) and 0.90% sodium chloride (30.0–55.0 mL) were intravenously injected into the back of the hand of the scanned patient at a 3.5–5.5 mL/s flow rate; (III) scanning: Bolus tracking was used to trigger the acquisition 5 s after an attenuation threshold of 100 Hounsfield units (HU) was reached into the aortic arch. Prospective or retrospective cardiac gating was chosen for use based on the heart rate and respiration of each patient. The scanning parameters were as follows: layer thickness: 0.75 mm; tube voltage: 70–120 kV; and (IV) image post-processing: the best diastolic and systolic phase were automatically reconstructed.

Zhang R., Ju Z., Li Y., Gao Y., Gu H, & Wang X. (2022). Pericoronary fat attenuation index is associated with plaque parameters and stenosis severity in patients with acute coronary syndrome: a cross-sectional study. Journal of Thoracic Disease, 14(12), 4865-4876.

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MDCT Thoracic Angiography Protocol

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The non-ECG-gated MDCT thoracic angiographic studies were acquired on one of the 2 MDCT scanners available, which included Somatom Definition 128-slice (Siemens) and Philips Brilliance iCT 256-slice (Philips Healthcare) scanners from January 2020 to November 2020, before the installation of the Somatom Force CT (Siemens) at our institute.

Sodhi K.S., Bhatia A., Rana P., Farook S., Saxena A.K., Baryah H.S., Mishra A.K, & Manoj R. (2022). Evaluation of coronary arteries in congenital heart disease in children: diagnostic comparison of electrocardiogram-gated and non-electro-cardiogram-gated computed tomography cardiac angiography. Polish Journal of Radiology, 87, e688-e693.

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ECG-Gated Thoracic MDCT Angiographic Protocols

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The ECG-gated thoracic MDCT angiographic studies were acquired on a Somatom Force CT (Siemens) scanner from December 2020 to December 2021. All the studies were prospectively gated with turbo flash spiral data acquisition. Automated selection of mAs (milliampere-seconds) was done with CARE dose 4D dose modulation software, which is inbuilt in the scanner.
The specific thoracic MDCT parameters for the 3 different MDCT scanners used are summarized in Table 1.

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CT-Guided Airway Stent Placement Protocol

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Routine clinical and laboratory examinations were performed before the procedure. A 64-slice unenhanced CT (SOMATOM Force CT, SIEMENS, Germany) was used for chest CT with scanning points from neck to thorax. The raw data was reconstructed by ADMIRE (strength = 3) with a slice thickness of 1 mm. The DICOM data were sent to a singo.via (VB10b) workstation (Siemens Heathineers). The diameter and length of the trachea and bronchi were measured in the singo.via workstation by two doctors with more than 10 years’ experience in airway disease. All of the Y stents were designed and manufactured according to individual airway dimensions (Micro-Tech Co. Ltd., Nanjing, China). Stents were woven with a nickel–titanium wire, with a diameter 10–20% larger than the airway diameter. The main body of the stent and its bronchial limbs were covered with polyethylene membranes. Antibiotic treatment was given for 3 to 7 days to control lung infection according to the results of bacterial culture and sensitivity testing.

Bi Y., Zhu X., Yu Z., Wu G., Han X, & Ren J. (2019). Clinical outcomes of metallic Y-shaped covered stents for bronchopleural fistula around upper carina after lobectomy. BMC Pulmonary Medicine, 19, 199.

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Coronary CT Angiography Protocol

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CCTA examinations were performed using a third-generation, 64-row multidetector, dual-source CT scanner (SOMATOM Force CT; SIEMENS, Munich, Germany) with a detector collimation of 2 mm × 96 mm × 0.6 mm, a rotation time of 250 ms, tube voltage of 120 kV, and tube current of 350 − 650 mA. The standard scanning protocol was used during this study. When patients had a heart rate < 80/min and ≥ 80/min, prospective high-pitch spiral scanning mode (65% of relative risk interval) and sequence scanning mode (30-70% of relative risk interval) were performed, respectively. In total, 898 patients underwent prospective high-pitch spiral scanning mode with a radiation dose (dose length product, DLP) of 43.7±13.0 mGycm and 271 patients underwent sequence scanning mode with a radiation dose (DLP) of 303.1±135.0 mGycm. Volume rendering and curve planner reformation were performed using SIEMENS Syngo. A postprocessing workstation (SIEMENS).

Wu M., Feng J., Zhang Z., Zhang N., Yang F., Li R., Men Y, & Li D. (2023). Sex-specific associations of cardiovascular risk factors and coronary plaque composition for hemodynamically significant coronary artery stenosis: a coronary computed tomography angiography study. BMC Cardiovascular Disorders, 23, 423.

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Chest CT Scan Protocol for Lung Imaging

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A chest CT scan (supine position, ranging from the apex to the base of the lung) without contrast media was performed with a 16 or 64-detector CT system (Revolution CT, GE Healthcare, or SOMATOM Force CT, SIEMENS Healthineers) using the following scan parameters: tube voltage of 120 kV, tube current of 50–200 mA, rotation time was 0.5–1.0 s, a pitch of 1.0–1.5, conventional layer thickness of 5.0 mm, reconstruction layer thickness of 1.0–1.5 mm. All CT images were reviewed with the lung window (window width, 1500 HU; window level, −500 HU) and the mediastinal window (window width, 350 HU; window level, 40 HU).

Fang W., Zhang G., Yu Y., Chen H, & Liu H. (2022). Identification of pathological subtypes of early lung adenocarcinoma based on artificial intelligence parameters and CT signs. Bioscience Reports, 42(1), BSR20212416.

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