All CT scans were performed using post-64-detector row CT scanners from Siemens (Somatom Definition Flash, Somatom Force, or Somatom Drive, Forchheim, Germany) and GE (Revolution CT, Discovery CT750 HD, or 64-slice LightSpeedVCT, GE Medical Systems, Milwaukee, WI, USA). Every scan started with non-contrast scanning from the thoracic inlet to the pubic symphysis to cover the entire aorta. Subsequently, contrast-enhanced CT was performed over the same area during the systemic arterial phase. The slice thickness was 1–5 mm for NCCT images and 1–1.5 mm for contrast-enhanced CTA images. The other scanning parameters were as follows: rotation time, 0.5 s; pitch, 1.2–1.375; matrix, 512 × 512; standard resolution algorithms; and tube voltage, 80–100 kV (Somatom Definition Flash or Somatom Force or Somatom Drive, Germany) and 120 kVp (Revolution CT or Discovery CT750 HD or 64-slice LightSpeedVCT, GE Healthcare, USA). The tube current was adjusted automatically using the noise index mode.
Revolution ct
Manufactured by GE Healthcare
Sourced in United States, Germany, Japan
The Revolution CT is a computed tomography (CT) imaging system developed by GE Healthcare. It is designed to provide high-quality medical imaging for various clinical applications. The core function of the Revolution CT is to capture detailed cross-sectional images of the body, which can be used by healthcare professionals for diagnosis, treatment planning, and monitoring.
Automatically generated - may contain errors
Lab products found in correlation
Lightspeed vct, by GE Healthcare (22 mentions)
Somatom definition flash, by Siemens (22 mentions)
Discovery ct750 hd, by GE Healthcare (20 mentions)
Somatom force, by Siemens (7 mentions)
Ultravist, by Bayer (7 mentions)
Brilliance ict, by Philips (6 mentions)
Aquilion 64, by Toshiba (6 mentions)
Somatom definition, by Siemens (5 mentions)
Omnipaque, by GE Healthcare (4 mentions)
Optima ct660, by GE Healthcare (4 mentions)
Gsi assist, by GE Healthcare (4 mentions)
Smartprep, by GE Healthcare (4 mentions)
Asir 5, by GE Healthcare (4 mentions)
Brilliance 64, by Philips (3 mentions)
Somatom definition flash ct, by Siemens (3 mentions)
Synapse, by Fujifilm (3 mentions)
Omnipaque 350, by GE Healthcare (3 mentions)
Aquilion one, by Canon (3 mentions)
Somatom definition as, by Siemens (3 mentions)
Somatom sensation 16, by Siemens (3 mentions)
232 protocols using revolution ct
1
Standardized Aortic CT Angiography Protocol
2
Multimodal Chest CT Imaging Protocols
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Chest CT images were acquired using one of the nine different systems (Sensation 64, Somatom Definition Flash, Somatom Force, Somatom Definition AS+; Siemens Healthineers; Discovery CT750 HD, Revolution EVO, Revolution CT, LightSpeed VCT: GE Healthcare, and iCT 256, Philips Healthcare). Images were obtained by modulating the tube voltage (usually at 120 kVp) and current (standard mAs and low mAs), leading to two different categories of radiation doses: standard and low dose. In addition, the slice thickness (thin sections [1 or 1.25 mm], medium sections [2 or 3 mm], and thick sections [5 mm]) and image reconstruction algorithms (filtered back projection and iterative reconstruction) varied. Detailed imaging parameters and their modulations are presented in Supplementary Table 1 .
Non-contrast cardiac CT for calcium scoring was acquired using one of eight different systems (Somatom Definition Flash, Somatom Force, Somatom Definition AS+; Siemens Healthineers; Revolution EVO, Revolution CT, LightSpeed VCT; GE Healthcare; iCT 256: Philips Healthcare; and Aquilion ONE: Toshiba). Detailed imaging parameters and their modulations are presented inSupplementary Table 2 .
Non-contrast cardiac CT for calcium scoring was acquired using one of eight different systems (Somatom Definition Flash, Somatom Force, Somatom Definition AS+; Siemens Healthineers; Revolution EVO, Revolution CT, LightSpeed VCT; GE Healthcare; iCT 256: Philips Healthcare; and Aquilion ONE: Toshiba). Detailed imaging parameters and their modulations are presented in
3
Bovine Stifle Joint CT Assessment
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After diffusion time was investigated from micrographs, millimeter-scale assessments were performed using a clinical computed tomography apparatus (RevolutionTM CT, GE Healthcare, Waukesha, WI, USA), on distal-end tibiae of bovine stifle joints (n = 3).
The used CT apparatus relied upon fast X-ray tube voltage switching technology and was capable of acquiring multiple images simultaneously at two different tube voltages (80/140 kVp, slice thickness 0.625 mm) in single source-detector configuration. Additionally, virtual monochromatic reconstruction images ranging from 40 to 140 keV could be obtained, exploiting the Gemstone Spectral Imaging (GSI) Xtream image generation flow [37 ].
The used CT apparatus relied upon fast X-ray tube voltage switching technology and was capable of acquiring multiple images simultaneously at two different tube voltages (80/140 kVp, slice thickness 0.625 mm) in single source-detector configuration. Additionally, virtual monochromatic reconstruction images ranging from 40 to 140 keV could be obtained, exploiting the Gemstone Spectral Imaging (GSI) Xtream image generation flow [37 ].
4
CT Imaging Analysis of Pulmonary Lesions
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High-resolution CT (HRCT) or chest CT scans were evaluated while screening for pulmonary lesions. All images were obtained via a 256-slice CT device (RevolutionTM CT; General Electric Healthcare Company, Chicago, Illinois, USA) with patients at the end of inspiration and in the supine position. The axial images were obtained craniocaudally and included the body parts from the thoracic inlet to the diaphragm. No contrast media was used during the scans. The scans were performed with the following technical parameters: HRCT and chest CT: 120 kV, 250 mA, 0.625 slice thickness, 512×512 matrix. The reconstructed images were also obtained and used in the current study. Chest radiology specialist (Aydin AM, who had 23 years of experience in the profession) reviewed the chest CT images. Chest CT images were evaluated with both mediastinal (width: 350 HU, level: 40 HU) and lung (width: 1400 HU, level: -500 HU) window level settings.
In the study, we especially evaluated the two most common imaging features that were defined in previous studies. These included ground-glass opacities (GGO) and consolidation (7, 8) . The presence of a single lobe lesion was considered as limited involvement while multiple lobe lesions were considered as diffuse involvement for both GGO and consolidation.
In the study, we especially evaluated the two most common imaging features that were defined in previous studies. These included ground-glass opacities (GGO) and consolidation (7, 8) . The presence of a single lobe lesion was considered as limited involvement while multiple lobe lesions were considered as diffuse involvement for both GGO and consolidation.
5
CT Imaging Protocol for Body Composition
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CT examination was performed with various scanners, including Revolution CT (GE Healthcare, Waukesha, WI, USA), Brilliance Ict (Philips Healthcare, Cleveland, OH, USA), and SOMATOM Definition Flash (Siemens Healthcare, Forchheim, Germany). The scan range was set from the level of the thoracic inlet to the pubic symphysis. All scans were reconstructed with 0.625, 0.75, 1, or 1.5 mm slices. A tube potential of 120, 100, and 80 kV was used for patients with a body mass index (BMI) >30, 20–30, and <20 kg/m2, respectively. The X-ray tube current was adjusted automatically. The contrast-enhanced acquisition was performed with an intravenous bolus injection of iodinated contrast medium (iopromide 370 mgI/mL; Ultravist, Bayer Healthcare, Leverkusen, Germany) at a volume of 1 mL/kg body weight with a saline chaser of 40 mL at a rate of 4–5 mL/s. Automated bolus tracking was applied with a circular region of interest positioned at the level of the descending aorta. Data acquisition was started 6 seconds after the CT value reached a threshold of 100 HU. The raw data of the scans were transferred to the workstation (Advantage Workstation Release 4.6 software, GE Healthcare) for 3-dimensional image reconstruction and measurement.
6
Imaging Evaluation of Diving-Related Lung Abnormalities
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Images were obtained using a low-dose GE Revolution CT multi-slice scanner (slice thickness 0, 625/mm). Pathological findings were analyzed in terms of emphysematous, cystic, bronchial (bronchial dilatation, bronchial syndrome, bronchial thickening) and parenchymal (nodules with distinction concerning nodules larger than 6 mm, granulomas, atelectasis, ground glass abnormalities, ventilatory disorders) abnormalities. The radiologists working in the hospital are trained in imaging related to diving medicine.
7
Coronary Artery Calcium Assessment using Cardiac CT
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All patients underwent a noncontrast multidetector cardiac CT (LightSpeed VCT or Revolution CT; GE Healthcare, Milwaukee, WI, USA) with standard ECG‐gated protocol. CAC was measured using a semi‐automatic software (syngo.via ct cascoring ; Siemens Healthcare, Forchheim, Germany) and assessed as a lesion with an area >1 mm2 and a peak intensity >130 Hounsfield Unit (HU) based on the Agatston method and expressed in Agatston units (AU) 15 . The Agatston score is a product of density (HU) and area (mm2) of the coronary calcification and is calculated using a weighted measurement to the highest density of calcification in a coronary artery. The density (HU) is scored as 1 = 130–199 HU, 2 = 200–299 HU, 3 = 300–399 HU and 4 = ≥400 HU. The Agatston score of each plaque is then summed for all image slices of the heart to determine the total CAC score. Total CAC score was defined as the sum of the CAC scores in the left main artery, the left anterior descending artery, the left circumflex artery and the right coronary artery.
8
Evaluating Neck Lymph Node Metastases in HNC
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Our investigation included patients diagnosed with head and neck cancer (HNC) who underwent neck lymph node dissection (LND) at our institute from January 2019 to March 2021. To minimize the impact of preoperative CT scans on diagnostic accuracy for cervical nodal metastases, we selected patients who had received a diagnostic intravenous contrast-enhanced CT scan of the neck within 30 days before LND. We gathered demographic, clinical, and pathological data, which featured the anatomical site, tissue dimensions, microscopic characteristics, and lymph node assessment for malignant cells. We collected paired preoperative contrast-enhanced CT scans from 156 individual HNC patients with corresponding pathological reports. These scans were conducted using three distinct CT scanners from two leading manufacturers: Revolution CT (GE Healthcare), Brilliance 64 (Philips Healthcare), and iCT 256 (Philips Healthcare). In adherence to the Helsinki Declaration’s ethical guidelines, our study received approval from the Institutional Review Board.
9
Whole-Brain CT Perfusion for Endovascular Treatment
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All patients underwent whole-brain CTP within 3 days before and 3 days after the
endovascular treatment. CTP images were acquired using a 256-slice axial CT
scanner (GE Revolution CT). Contrast agent, 50 ml (Omnipaque, 350 mg I/ml; GE
Healthcare, Shanghai, CN) was injected into the antecubital vein at a rate of
5 ml/s using an automated injector (Ulrich Injection System; Ulrich GMBH &
Co. KG, Germany). After a 5-s delay, CTP was performed with the following
acquisition parameters: 80 kV tube voltage, 150 mA, 5 mm slice thickness,
256 × 0.625 mm collimation, 0.5 s rotation time, 2.0 s cycle time, 25-cm field
of view (FOV), 512 × 512 image matrix size, and 32 slices. A total of 512 slices
were obtained with a 160 mm scan length and scan time of about 40 s.
endovascular treatment. CTP images were acquired using a 256-slice axial CT
scanner (GE Revolution CT). Contrast agent, 50 ml (Omnipaque, 350 mg I/ml; GE
Healthcare, Shanghai, CN) was injected into the antecubital vein at a rate of
5 ml/s using an automated injector (Ulrich Injection System; Ulrich GMBH &
Co. KG, Germany). After a 5-s delay, CTP was performed with the following
acquisition parameters: 80 kV tube voltage, 150 mA, 5 mm slice thickness,
256 × 0.625 mm collimation, 0.5 s rotation time, 2.0 s cycle time, 25-cm field
of view (FOV), 512 × 512 image matrix size, and 32 slices. A total of 512 slices
were obtained with a 160 mm scan length and scan time of about 40 s.
10
CTPA Examination Protocol with Contrast
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CTPA examinations were performed using a scanner of Brilliance iCT (Royal Philips, Amsterdam, Netherlands) or Revolution CT (GE Healthcare, Milwaukee, WI, USA), with the intravenous administration of iodinated contrast agent (iopamidol, 370 mg I/ml), which was modulated according to the patient weight. Non-enhanced and enhanced CT attenuation values (Hounsfield units, HU) were measured and the enhancement degree was described as mild or severe when the CT value increased (ΔCT value) by < 20 HU or ≥ 20 HU, respectively.
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