AAC was measured using electron-beam CT scanners at Northwestern University and University of California, Los Angeles (Imatron C-150) at settings previously described, using 25 6-mm slices with a 35-cm field of view and normal kernel.7 (link) Multidetector CT mode scanners (Sensation 64, GE LightSpeed, Siemens S4+ Volume Zoom and Siemens Sensation 16) using 5-mm slices with a 35-cm field of view were used at the remaining three field centers: Columbia University, Wake Forest University, and University of Minnesota. All scans were analyzed centrally using a standard protocol by the MESA CT Reading Center, and all scan scores were brightness-adjusted with a standard phantom. Calcification was identified as a plaque ≥1 mm2 with a density >130 Hounsfield units and quantified using the Agatston scoring method.20 (link) CAC was measured using the methodology for acquisition, interpretation, and reproducibility that has been previously described.21 (link) The Agatston score was calculated as above,20 (link) and scores were adjusted using a standard calcium phantom that was scanned along with the participant.22 (link) Any detectable calcium was defined as a CAC score >0.21 (link)
Sensation 64
Manufactured by GE Healthcare
Sourced in United States
The Sensation 64 is a computed tomography (CT) imaging system developed by GE Healthcare. It is designed to capture high-quality images of the body's internal structures. The system features a 64-slice configuration, allowing for rapid and efficient data acquisition during a CT scan.
Automatically generated - may contain errors
Lab products found in correlation
Sensation 16, by Siemens (1 mentions)
Somatom sensation 16, by GE Healthcare (1 mentions)
Definition as, by GE Healthcare (1 mentions)
Definition flash, by GE Healthcare (1 mentions)
Discovery 690, by GE Healthcare (1 mentions)
Ge discovery 750 hd, by GE Healthcare (1 mentions)
Discovery ct750 hd, by Philips (1 mentions)
Somatom definition, by GE Healthcare (1 mentions)
Brilliance 64, by Toshiba (1 mentions)
Somatom definition as, by GE Healthcare (1 mentions)
Somatom definition flash, by GE Healthcare (1 mentions)
Light speed 16, by Philips (1 mentions)
5 protocols using sensation 64
1
Coronary Artery Calcification Measurement
2
Three-Dimensional Visualization of Sphenoid Sinus Anatomy
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All data were collected from the department of radiology of the hospital. CTA images were acquired using a 64-slice multidetector scanner (Sensation 64, GE Healthcare, Madison, WI, USA). Imaging parameters for CT scanning and detailed procedures for postprocessing are listed in the supplementary materials. Thin-slice CT transverse images from all subjects were first uploaded to the picture archiving and communication system, with the CT data (Digital Imaging and Communications in Medicine 3.0) then inputted into a computer-aided clinical research platform using aw4.6 software (GE Healthcare) to analyse the images. The 3D structure of each of the sphenoid sinus bones was reconstructed transparently and fused with the 3D image of the optic nerve and the internal carotid-ophthalmic artery, using transparency, colour, and shading to enable better representation of the position and relationship of the optic nerve and internal carotid on the skull base.
3
Standardized Hip Imaging Protocol
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Imaging of the hips was acquired helically in the supine position on five different clinical whole-body multi-detector CT machines (Siemens SOMATOM Sensation 16, Sensation 64, Definition Flash, Definition AS+, and a GE Medical Systems Discovery 690). The acquisition protocol involved imaging inclusively from the superior margin of the acetabuli to the lesser trochanters. All acquisitions were processed with a standard smooth-edge body kernel and reconstructed with axial slice separation ranging from 0.75 to 1.5 mm, equivalent to slice thickness in all cases. In-plane pixel spacing varied from 0.59 to 0.78 mm, with field of view consistently 512 by 512 pixels. Peak kV was routinely 120 kV. When available from the fully anonymised metadata, recorded exposure ranged from 67-274 mAs, varying due to routine use of dose limiting.
4
Abdominal CT Scan Protocol
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Siemens Sensation 64 or GE Discovery 750HD scanners were used to perform the CT scan. The CT scanning parameters were as follows: tube voltage of 120 kV, tube current of 210 mA, layer thickness and layer spacing of equally 5 mm, and matrix size of 512 × 512. Fasting was essential 8–10 h before the examination and drinking of moderate amounts of water before the scan was permitted to keep the patient's bladder to be properly filled. During the examination, the patient was placed in a supine position, and the scan range was from the iliac crest to the lower edge of the pubic symphysis. If a lesion was not included, the scan range could be expanded. Perform conventional P-CT scan first, and then, inject the contrast agent, non-ionic contrast material iohexol (320 mg I/mL; Yangtze River Pharmaceutical) 90–100 mL, through the antecubital vein at a rate of 3–3.5 mL/s for the CE-CT scan. The scanning phase included P-CT scan, venous phase (with a delay of 70 s) CE-CT, and three-dimensional reconstruction of the venous phase was performed.
5
Multi-scanner CT Image Acquisition Protocol
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CT images were acquired from the Picture Archiving and Communication System of our institution and were saved in Digital Image and Communication in Medicine format. Because our institution is an academic medical center with many patients referred from several affiliated hospitals, imaging data were obtained from different scanners (Siemens SOMATOM Definition, SOMATOM Definition AS, SOMATOM Definition Flash, and Sensation 64; GE Medical System Optima CT 660, Discovery CT 750 HD, BrightSpeed S, and LightSpeed 16; Philips Brilliance 64; Toshiba Aquilion, Aquilion ONE, and Aquilion PRIME). The contrast-enhanced CT images were obtained after intravenous iodine contrast injection and reconstructed using a 5 mm slice thickness without gap.
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