CTA neck studies were performed on one of our institution's CT scanners, including the Optima 660, Lightspeed Xtra, Lightspeed Pro‐16 or Discovery HD‐750 (GE Healthcare; Milwaukee, WI). CTA studies were acquired in helical scanning mode with coverage extending from the aortic arch to the C1 ring. Studies were collimated at 0.625 mm, with kVp of 120, auto‐mA, and with a rotation time of 0.5 s. For each study, ≈90 mL of nonionic iodinated contrast (iohexol, Omnipaque, GE Healthcare) was administered at a rate of 4 to 5 mL/s using a power injector and SmartPrep region‐of‐interest on the aortic arch via an 18‐gauge peripheral intravenous catheter.
Lightspeed xtra
Manufactured by GE Healthcare
Sourced in United States
The LightSpeed Xtra is a computed tomography (CT) imaging system developed by GE Healthcare. It is designed to capture high-quality, detailed images of the body's internal structures. The LightSpeed Xtra utilizes advanced X-ray technology to generate these images, which can be used by medical professionals for diagnosis and treatment planning purposes.
Automatically generated - may contain errors
Lab products found in correlation
Optima 660, by GE Healthcare (2 mentions)
Discovery hd 750, by GE Healthcare (2 mentions)
Omnipaque, by GE Healthcare (2 mentions)
Lightspeed pro 16, by GE Healthcare (2 mentions)
Lightspeed vct, by GE Healthcare (2 mentions)
Isovue 300, by Bracco (1 mentions)
Brilliance 16 ct, by Philips (1 mentions)
Excite hd, by GE Healthcare (1 mentions)
6 protocols using lightspeed xtra
1
CTA Neck Imaging Protocol
2
Standardized CTA Head and Neck Protocol
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CTA of the head and neck studies were performed using a standardized protocol performed on our hospital system's inpatient CT scanners, including the Optima 660, Discovery HD‐750, Lightspeed Pro‐16, and Lightspeed Xtra (GE Healthcare; Milwaukee, WI). Scan coverage extended from the aortic arch to the vertex. Studies were obtained in a helical scanning mode. Studies were collimated at 0.625 mm, with kVp of ≈120, auto‐mA, and with 0.5 s rotation time. For each CTA study, around 90 mL of nonionic iodinated contrast (iohexol, Omnipaque, GE Healthcare) was used. Contrast was administered at a rate of 4 to 5 mL/s using a power injector via an 18‐guage peripheral intravenous catheter.
3
CT Imaging for Radiotherapy Planning
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Computed tomography (CT) images were obtained using a scanner with 16 detector arrays (LightSpeed Xtra; GE Healthcare, Waukesha, WI, USA) while patients were in the supine position on a breast board with both arms above their heads. After radiopaque markers had been placed at the midline, the mid-axillary line, a site 1 cm below the infra-mammary fold, and at the level of the head of the clavicle, scanning was performed in 2.5-mm slices from the clavicle to the mid-abdomen during free breathing (FB). After the acquisition of the FBCT data set, 2 additional CT scans were obtained during a held breath after a light inhalation (IN) and a light exhalation (EX). All CT images were transferred to Eclipse External Beam Planning 6.5 software (Varian Medical Systems Palo Alto, CA, USA). We fused the IN-CT and EX-CT images with the FB-CT images according to the spine. Images fusion was easy and very precise because the CT scans were obtained continuously without any movement of the body.
4
CT Imaging Protocol for Detailed Visualization
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CT examinations were performed with 64-detector row CT scanners (LightSpeed VCT [GE Healthcare, Milwaukee, WI] LightSpeed Xtra [GE Healthcare, Milwaukee, WI]), or IQon [Philips Healthcare, Best, Netherlands]. Axial CT Images were acquired with the following parameters: 120 kVp; mAs 200–650 adjusted according to patient size; section thickness of 0.625 mm, table speed of 13.75 mm per rotation, pitch of 1.375. All images were reconstructed with a section thickness of 2.5–5 mm. Multiplanar reconstructed images were created in sagittal and coronal planes, with reconstructed section thickness of 3 mm. For contrast-enhanced studies, 90–120 mL of iopamidol (300 mg iodine per milliliter [Isovue 300] or 370 mg iodine per milliliter [Isovue 300]; Bracco Diagnostics, Monroe Township, NJ) was injected at a rate of 2–4 mL/s. Bolus-tracking software was used for image timing, depending on the protocol.
5
Contrast-Enhanced CT and MRI Imaging Protocol
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All CT studies were performed on one of the 64-detector row CT scanners (LightSpeed VCT [GE Healthcare, Milwaukee, WI] or LightSpeed Xtra [GE Healthcare, Milwaukee, WI]) or a 16-detector row scanner (Brilliance 16 CT [Philips Healthcare, Best, Netherlands]). Imaging parameters varied by scanners but included: 120 kV; effective tube current-time charge, 200-250 mAs per section; reconstruction thickness, 2-5 mm; reconstruction increment, 1 mm. The area scanned extended from the diaphragmatic domes to the ischium. CT examinations that were enhanced with contrast material, were performed after intravenous injection of 100-120 mL of iopamidol (300 mg iodine per milliliter, Isovue 300; Braco Diagnostics, Monroe Township, NJ) injected at a rate of 3 mL/s. . Axial T2-weighted without fat suppression, axial T2-weighted sequences with fat suppression (when available), pre-and post-contrast 3D T1-weighted GRE images (when available) were reviewed.
6
Phantom Imaging: MRI and CT Comparison
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A phantom was constructed from a porcine hoof specimen (length 16 cm, thickness 6.5 cm) embedded in 1% agarose gel (container height 20 cm, average diameter 11 cm) and, for comparison purposes, was imaged using an MR scanner (3T, GE Excite HD) and a clinical CT system (LightSpeed Xtra, GE Healthcare, Milwaukee, WI, USA). The MR imaging parameters included the following: TE ¼ 0:04; 0:24; 3:0; 4:0 ms; TR ¼ 12 ms; flip angle ð FAÞ ¼ 15
; field of view ðFOVÞ ¼ 18 cm; 32000 radial projections per echo, voxel size 0:7 Â 0:7 Â 1:4 mm, bandwidth (BW) ¼ 662:5 kHz; total acquisition time ¼ 13 min.
The CT data were acquired using the following parameters: 120 kVp, 200 mA, 0.625-mm slice thickness, 512 x 512 matrix, achieving nearly isotropic resolution.
; field of view ðFOVÞ ¼ 18 cm; 32000 radial projections per echo, voxel size 0:7 Â 0:7 Â 1:4 mm, bandwidth (BW) ¼ 662:5 kHz; total acquisition time ¼ 13 min.
The CT data were acquired using the following parameters: 120 kVp, 200 mA, 0.625-mm slice thickness, 512 x 512 matrix, achieving nearly isotropic resolution.
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