Somatom definition flash dual source ct

Manufactured by Siemens

Sourced in Germany

The SOMATOM Definition Flash dual-source CT is a computed tomography (CT) scanner manufactured by Siemens. It is designed to capture high-quality images of the human body. The device utilizes two X-ray sources and detectors to enable faster scanning speeds and improved image quality.

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3 protocols using somatom definition flash dual source ct

Dual-Source CT Dual-Energy Diagnosis

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This study was approved by the medical ethics Committee of Shanghai Universal Medical Imaging Diagnostic Center (approval number: SHQJ-2022-12) on 27^th December 2022, and all patients signed informed consent.
The examination instrument was Siemens SOMATOM Definition Flash dual-source CT. All the patients underwent pathological diagnosis, conventional CT plain scan and dual-source CT dual-energy diagnosis. Siemens SOMATOM Definition Flash dual-source CT was used. The bulb voltage was set to 100 kvp and 140 kvp respectively, and the bulb current was set to 230 mAs and 172 m respectively. The FOV was set at 50 cm × 50 cm and 33 cm × 33 cm, and the scanning Angle was set at 94°C. The CARE Dose 4D dynamic exposure dose regulator was started. The collimation, rotation speed and sweep pitch were set to 0.6 mm × 128 mm, 0.5 s/week and 0.6, respectively. Routine plain scan was performed first. The scanning staff instructed the patient to inhale and exhale correctly, set the scanning layer thickness to 5 mm, and scan the thoracic entrance to the diaphragmatic area. The scanning layer thickness and scanning range of dual-energy enhanced scan were the same as that of conventional scan. Iohexol was used as the contrast agent. According to the dose of 350 mgI/mL, the scanning flow rate was set to 3.0 mL/s, and the scanning delay was 35s.

Liu L., Ni Z., Zhang J., Zhao J, & Shen J. (2024). Application of artificial intelligence-based dual source CT scanning in the differentiation of lung adenocarcinoma in situ and minimally invasive adenocarcinoma. Pakistan Journal of Medical Sciences, 40(3Part-II), 271-276.

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CT Imaging Characteristics of Pulmonary Ground-Glass Nodules

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All patients in the training data set underwent a non-enhanced HRCT scan with an image slice thickness of 1 mm using Siemens Somatom Definition Flash Dual-Source CT. All nodules were pGGNs with a size ≤3 cm. All the CT data were recorded as Digital Imaging and Communications in Medicine (DICOM) data, and the images were lung algorithmically rebuilt. The pGGN features assessed included the nodule size (average of the long and short diameters), maximal CT value, and morphological characters of the pGGNs. Vessels were avoided when measuring the CT value. The CT morphological characters of pGGNs included signs of lobulation, spiculation and pleura indentation, vacuole sign, vessel abnormality, and nodule vessel penetration. An abnormal vessel was defined as “vessel curve” or “vessel enlargement”. The CT images of the training data set were read, analyzed, and diagnosed with PneuView lung DICOM analysis software 2.3 (Intrasense Corp., Ltd., France) by two attending doctors at the Zhongshan Hospital with more than 15 years of experience in imaging diagnosis who were blind to the pathological results. If any disagreement arose between the doctors, the issue was discussed until a consensus was reached.

Hu F., Huang H., Jiang Y., Feng M., Wang H., Tang M., Zhou Y., Tan X., Liu Y., Xu C., Ding N., Bai C., Hu J., Yang D, & Zhang Y. (2021). Discriminating invasive adenocarcinoma among lung pure ground-glass nodules: a multi-parameter prediction model. Journal of Thoracic Disease, 13(9), 5383-5394.

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Multi-Center Thoracic CT Imaging Protocol

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All CT scans were performed on one of three scanners – SOMATOM Definition Flash Dual Source CT, 80 and 140 kV, 2 × 128 slice (Siemens Healthcare, Forchheim Germany), SOMATOM Definition Flash Single source CT (Siemens Healthcare, Forchheim, Germany) and SOMATOM Definition AS Single source CT (Siemens Healthcare, Forchheim, Germany).
All images were acquired with patients in supine position, during a single inspiratory breath-hold. The scan area was from lung apices to costophrenic angles, with collimation of 1.2 mm.

Singh S., Bhalla A.S., Naranje P, & Mohan A. (2022). Computed tomography in secondary spontaneous pneumothorax: Reading the fine print. Lung India : Official Organ of Indian Chest Society, 39(4), 319-324.

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