The X-ray CT images were taken using a Discovery CT750 HD system (CT750, GE healthcare, Milwaukee, USA). The CT750 allows the use of a fast kV switching-mode DECT in which dual energy data can be acquired by rapidly switching between 140 and 80 kVp during a single rotation of the X-ray tube [14 (link)]. The acquisition conditions were as follows: tube voltage, 140 kVp/80 kVp; tube current, 600 mA; tube rotation time, 1.0 s; acquisition mode, axial scan; slice thickness, 0.625 mm; slice interval, 0.625 mm; matrix, 512 × 512; Recon kernel, Standard. The images were analyzed using a Gemstone Spectral Imaging Application for the Advantage Workstation Volume Share5 (AW, GE Healthcare, Milwaukee, USA).
Discovery ct750 hd system
Manufactured by GE Healthcare
Sourced in United States
The Discovery CT750 HD system is a computed tomography (CT) imaging device developed by GE Healthcare. It is designed to capture high-resolution images of the body's internal structures, enabling healthcare professionals to diagnose and monitor various medical conditions. The system utilizes advanced imaging technology to provide detailed visualization of anatomical features.
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Lab products found in correlation
4 protocols using discovery ct750 hd system
1
Dual-Energy CT Imaging Protocol
2
CT-Based Hepatic Volume Assessment for Liver Resection
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All patients underwent CT examinations to evaluate the total hepatic and the future liver remnant (FLR) volume before extensive liver resection. FLR volume < 40% was considered insufficient in patients treated with chemotherapy. CT scans were performed to evaluate FLR volume. CT scan protocol (Discovery CT750 HD system; GE Healthcare, Wauwatosa, WI, USA) included an unenhanced scan followed by triphasic acquisition after injection of non-ionic contrast medium followed by 40 mL saline flush using an automatic injector (MEDRAD Stellant; MEDRAD, Inc., Warrendale, PA, USA).
Post-contrast imaging scan was determined by automated bolus triggering (SmartPrep; GE Healthcare).
On an independent workstation (Advantage Windows 4.7, GE Healthcare) the interventional radiologist and the liver surgeon calculated the total hepatic and the FLR volume using a dedicated semi-automated CT software.
Only axial slices of at least 1.25 mm in portal venous phases were considered reliable to calculate hepatic volumes. Main portal extrahepatic vein, gallbladder and any metastasectomy area were manually excluded.
Once the segmentation was completed the software automatically calculated the hepatic and FLR volume (mL).
Post-contrast imaging scan was determined by automated bolus triggering (SmartPrep; GE Healthcare).
On an independent workstation (Advantage Windows 4.7, GE Healthcare) the interventional radiologist and the liver surgeon calculated the total hepatic and the FLR volume using a dedicated semi-automated CT software.
Only axial slices of at least 1.25 mm in portal venous phases were considered reliable to calculate hepatic volumes. Main portal extrahepatic vein, gallbladder and any metastasectomy area were manually excluded.
Once the segmentation was completed the software automatically calculated the hepatic and FLR volume (mL).
3
Thoracic CT Imaging for Atrial Ablation
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Thoracic CT scan was performed systematically in all patients prior to ablation. A 64-row General Electric Discovery CT750 HD system (GE Healthcare, Milwaukee, WI, USA) was used to evaluate the anatomy and volume of the LA as well as adjacent structures. The volume of EF was measured a posteriori. After one acquisition without contrast injection, the region of interest was located in the LA to enable image acquisition with contrast injection. Images were acquired at inhalation breath-hold, with the patient’s arms above the head, in the cranio-caudal direction, with the following parameters: ECG-gated, 1.25 mm slice thickness, 0.4 sec rotation time. Images were acquired from 2 cm above the pulmonary apex to 2 cm below the cardiac apex. Iodinated contrast medium was administered via an antebrachial vein (90 ml Iomeprol 350 mg iodine/ml, Bracco imaging, France) at 5 ml/sec followed by a bolus of 50 ml of saline at 4 ml/sec.
4
Dual-Energy CT for Abdominal Imaging
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All patients underwent bowel preparation before the examination. Contrast-enhanced abdominal dual-energy CT scans were performed using a Discovery CT750 HD system (GE Healthcare, Waukesha, WI, USA) in the supine position. The energy spectrum CT scanning protocol was as follows: fast tube voltage switching between 80 and 140 kVp; tube current, 350 mAs; rotation time, 0.75 s; pitch, 0.984:1; and reconstructed layer thickness, 1.25 mm. Patients were intravenously injected with iodixanol (1 ml/kg) at an injection rate of 3.5–4.5 ml/s using a high-pressure dual-cylinder injector. Arterial phase (AP) and venous phase (VP) imaging were performed 25–30 and 60–70 s after the administration of contrast agent, respectively.
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