Preliminary experience with abdominal dual-energy CT (DECT): true versus virtual nonenhanced images of the liver
| Autor: | M. Luzietti, R. Ruopoli, Marco Rengo, S. Fedeli, Vittorio Miele, Vitaliano Buffa, M. Maurizi Enrici, Priscilla Fina, Andrea Laghi, C. N. De Cecco, Vincenzo David, A. Vallone |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
medicine.medical_specialty
Image quality liver diseases contrast media dual-energy computed tomography female humans iodine iopamidol liver male middle aged prospective studies radiation dose radiography: dual-energy scanned projection tomography: x-ray computed Iopamidol Radiography Dual-Energy Scanned Projection Precontrast Iodinated contrast medicine Image noise Radiology Nuclear Medicine and imaging business.industry Ultrasound Subtraction Dual-Energy Computed Tomography General Medicine Radiology Nuclear medicine business Tomography X-Ray Computed medicine.drug |
| Popis: | The aim of this work was to compare the quality and noise of true nonenhanced (TNE) and virtual nonenhanced (VNE) images in patients undergoing dualenergy computed tomography (DECT) of the liver. Twenty consecutive patients (mean age 54.7±19.9 years) prospectively underwent abdominal DECT to assess the liver using a triphasic protocol consisting of precontrast, arterial-phase and portal-phase acquisitions. Exclusion criteria were allergy to iodinated contrast material, impaired renal function and a body mass index (BMI) >35 kg/m2. The DE portal-phase acquisition was performed with automatic dose modulation (CARE Dose 4D). Nonionic iodinated contrast material (Iomeron 400) was administered at 0.625 gI/kg with a flow rate of 3.5 ml/s. Axial VNE images were reconstructed based on the portal data set using a collimation and an increment of 5 mm and were compared with TNE images reconstructed with the same parameters. The average image quality and noise were analysed by two radiologists in separate reading sessions. No statistically significant difference (p>0.05) in image quality was observed between VNE (4.00±0.85) and TNE images (4.35±0.58). A sufficient diagnostic quality was found in 95.0% (19/20) of VNE images and in 100% of TNE images. No statistically significant difference (p |
| Databáze: | OpenAIRE |
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