In 16 PASC patients, CE-CT was performed in our institution. In the remaining 15 PASC patients, CE-CT was performed in the other two institutions. Among the 31 PASC patients, CT was performed (a) with SOMATOM Definition (Siemens Healthcare, Germany) in 12, (b) with Optima 670 (GE Healthcare, Tokyo, Japan) in eight, (c) with Philips Brilliance 64 (Philips Healthcare, DA Best, Netherlands) in seven, and (d) with GE Lightspeed 64 VCT (GE Healthcare, United States) in four. Among the 81 PDAC patients, 63 patients underwent CE-CT in our institution (a) with Optima 670 (GE Healthcare, Tokyo, Japan) and (b) with Philips Brilliance 64 (Philips Healthcare, DA Best, Netherlands). The remaining 18 patients underwent CE-CT in the other two institutions (a) with SOMATOM Definition (Siemens Healthcare, Germany) and (b) with GE Lightspeed 64 VCT (GE Healthcare, United States). Similar protocols were adopted during the CT examinations: 120 kVp, 200–400 mAs, gantry rotation time of 0.5 s, helical pitch of 1.375, matrix of 512, and slice thickness of 1.0 mm, with a reconstruction interval of 1.0 mm. For multiphase imaging, 100–120 ml of non-ionic intravenous contrast media (Omnipaque, 350 mg I/ml, GE Healthcare) was administrated at a fixed rate of 3.0 ml/s. The scanning time delay was 40 s for the late arterial phase and 70 s for the portal venous phase.
Ge lightspeed vct 64
Manufactured by GE Healthcare
Sourced in United States, Japan, Germany, Netherlands
The GE LightSpeed VCT 64 is a 64-slice computed tomography (CT) scanner. It is designed to capture high-quality images of the body's internal structures, enabling healthcare professionals to diagnose and monitor various medical conditions. The system features a 64-slice data acquisition system and advanced imaging technology to provide fast, comprehensive scans with high spatial resolution.
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Lab products found in correlation
Sensation 64, by Siemens (6 mentions)
Ge 750hd 64, by GE Healthcare (5 mentions)
Brilliance 64, by Philips (4 mentions)
Ge lightspeed 16, by GE Healthcare (3 mentions)
Somatom sensation 64, by Siemens (3 mentions)
Ge optima 680, by GE Healthcare (3 mentions)
Somatom definition flash, by Siemens (2 mentions)
Aquilion 64, by Toshiba (2 mentions)
Somatom spirit, by Siemens (2 mentions)
Somatom as, by Siemens (2 mentions)
Brilliant 16, by Philips (2 mentions)
Omnipaque, by GE Healthcare (1 mentions)
Somatom definition, by Siemens (1 mentions)
Optima 670, by GE Healthcare (1 mentions)
Omnipaque 350, by Bayer (1 mentions)
Bright speed 16, by GE Healthcare (1 mentions)
Emotion 16, by Siemens (1 mentions)
Sensation 16, by Siemens (1 mentions)
Sensation 40, by Siemens (1 mentions)
Aquilion 16, by Toshiba (1 mentions)
25 protocols using ge lightspeed vct 64
1
Multi-institution CE-CT Imaging in PASC and PDAC
2
Standardized Abdominal CT Imaging Protocol
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Computed tomography (CT) examination was performed using a GE 64-layer spiral CT scanner (GE Light speed 64 VCT, United States). All patients underwent abdominal CT planar scanning first. The following CT scan parameters were set: tube tension 120 kV, tube current 36 mAs, collimation 40 mm, rack rotation time 0.6 s/circle, pitch 1.375 : 1, and slice thickness 3.0 mm. Then enhancement was achieved with 1.5 ml/kg body weight intravenous non-ionotropic contrast agent (Ultravist 370) injected at a rate of 3.5-4.5 ml/s to a peripheral vein.
3
Triple-Phase CT Liver Imaging Protocol
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All patients underwent triple-phase CT scan including unenhanced, late arterial, and portal venous phases. CT scanning was completed using one of the following scanners: (1) GE Optima 670 (GE Healthcare, Tokyo, Japan); (2) GE Lightspeed 64 VCT (GE Healthcare); (3) SIMENS SOMATOM Definition; and (4) Philips Brilliance 64 (Philips Healthcare, DA Best, the Netherlands). The following scan parameters were used: Tube voltage, 120Kvp; tube current, 200-400 mAs; helical pitch, 0.984-1.375; and 1.0 mm reconstruction slice thickness with an interval of 1.0 mm. An administration of 100-120 mL nonionic contrast media (Omnipaque 350, Bayer Pharmaceuticals) at a rate of 3.0-4.0 mL/s was performed after the unenhanced CT scan. The late arterial and portal venous phases were acquired at 35 s and 70 s, respectively.
4
Evaluating CT Imaging Performance Across Healthcare System
5
HRCT Evaluation of Interstitial Lung Disease
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HRCT was performed with 1.0 mm thick sections throughout the entire lung during inspiration and expiration in the supine position. All CT scans were performed in 64MDCT GE LightSpeed 64 VCT (GE Healthcare, Waukesha, Wisconsin). The CT scanning protocol was spiral mode, 120 kVp, 2000 mA, 0.5- s rotation time, 0.5-mm collimation and HRCT kernel was applied. CT images were reconstructed with 1-mm slice thickness in axial, coronal and sagittal.
Paired inspiratory and expiratory images were independently evaluated by two thoracic radiologists with more than 8 years of experience. All cases had their HRCT patterns reviewed and reclassified into the three groups of UIP according to the new criteria in the 2018 ATS/ERS/JRS/ALAT guideline.(3 (link)) A UIP pattern was defined by the presence of basal and subpleural predominance plus honeycombing with or without peripheral traction bronchiectasis or bronchiolectasis. The criterion of indeterminate for UIP, according to the guideline, was the presence of basal and subpleural fibrosis with mild reticulation, ground-glass opacities and/or distortion and other findings that do not suggest a specific etiology.(3 (link)) Radiologists interobserver agreement was assessed by calculating the kappa statistic (κ) and was interpreted according to a previous study.(6 (link))
Paired inspiratory and expiratory images were independently evaluated by two thoracic radiologists with more than 8 years of experience. All cases had their HRCT patterns reviewed and reclassified into the three groups of UIP according to the new criteria in the 2018 ATS/ERS/JRS/ALAT guideline.(3 (link)) A UIP pattern was defined by the presence of basal and subpleural predominance plus honeycombing with or without peripheral traction bronchiectasis or bronchiolectasis. The criterion of indeterminate for UIP, according to the guideline, was the presence of basal and subpleural fibrosis with mild reticulation, ground-glass opacities and/or distortion and other findings that do not suggest a specific etiology.(3 (link)) Radiologists interobserver agreement was assessed by calculating the kappa statistic (κ) and was interpreted according to a previous study.(6 (link))
6
Bifurcated Stent-Graft Imaging Study
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AngioCT data (GE Light-Speed 64 VCT; GE Healthcare, Fairfield, CT, USA) were collected from 27 patients aged 55–78 years who underwent treatment in the Barlicki Hospital No. 2 in Lodz (Poland) between 2007–2012. All participants gave written informed consent to the study. The collected data were from three different types of bifurcated stent-grafts: 16 patients were implanted with Zenith made by COOK (Cook Medical, USA), 8 patients were implanted with Endurant made by Medtronic (Medtronic, USA) and 3 patients were implanted with Excluder made by Gore (Gore, USA). The study was approved by the Local Ethic Committee on Medical University of Lodz (RNN/126/07/KE).
7
Non-Contrast Abdominal CT Imaging for NAFLD
8
Quantitative CT Imaging of NAFLD
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The CT protocol included the heart and abdomen using a non-contrast CT scan performed using GE (GE 750HD 64 and GE LightSpeed VCT 64 Birmingham and Oakland Centers, respectively; GE Healthcare, Waukesha, Wisconsin) or Siemens (Sensation 64, Chicago and Minneapolis Centers; Siemens Medical Solutions, Erlangen, Germany) multidetector CT scanners and has been described previously(7 (link)). Quality control and image analysis was performed at a core reading center (Wake Forest University Health Sciences, Winston-Salem, North Carolina).
NAFLD was defined as liver attenuation (LA) < 51 Hounsfield Units (HU, equivalent to a liver/spleen ratio < 1.0) after exclusion of other causes of liver fat (Figure 2 )(7 (link), 8 (link)). Measurement of LA was performed in the right lobe of the liver using CT slices through the upper abdomen and was reported as the average of nine measurements on three slices using circular regions of interest of 2.6 cm2. The interclass correlation coefficient between different readers on a random selected sample of 156 participants was 0.975 for LA, indicating high reproducibility of CT measured LA in this study. The methods for assessment of adiposity within the CARDIA study have also been described previously(7 (link)).
NAFLD was defined as liver attenuation (LA) < 51 Hounsfield Units (HU, equivalent to a liver/spleen ratio < 1.0) after exclusion of other causes of liver fat (
9
Pelvic and Sacral Osteosarcoma and Ewing's Sarcoma Imaging
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This study was conducted in accordance with the Declaration of Helsinki (as revised in 2013) and was approved by the Ethics Committee of Peking University People’s Hospital. The requirement for written informed consent for this retrospective analysis was waived. A total of 201 patients with pathologically confirmed pelvic and sacral OS or ES in Peking University People’s Hospital from June 2007 to June 2020 were retrospectively analyzed. All patients underwent CT examination within 1 month before the first operation. A total of 16 patients were excluded due to obvious artifacts on the CT images. Age, sex, maximal tumor size, tumor location (zones I–IV) (27 (link)), and the history of malignancy of the patients were also analyzed.
All CT images were obtained using multi-detector row CT systems (Philips iCT 256; Philips Medical Systems, Best, Netherlands; GE Lightspeed VCT 64; GE Medical Systems, Chicago, IL, USA). The scanning parameters were as follows: 120 kV, 100–370 mAs, slice thickness = 5 mm, field of view = 350 mm × 350 mm, and matrix = 512 mm × 512 mm. The reconstruction methods were soft tissue and bone kernel algorithms.
All CT images were obtained using multi-detector row CT systems (Philips iCT 256; Philips Medical Systems, Best, Netherlands; GE Lightspeed VCT 64; GE Medical Systems, Chicago, IL, USA). The scanning parameters were as follows: 120 kV, 100–370 mAs, slice thickness = 5 mm, field of view = 350 mm × 350 mm, and matrix = 512 mm × 512 mm. The reconstruction methods were soft tissue and bone kernel algorithms.
10
Quantitative CT Imaging of NAFLD
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