A noise-optimized virtual monochromatic reconstruction algorithm improves stent visualization and diagnostic accuracy for detection of in-stent re-stenosis in lower extremity run-off CT angiography

Autor: Ricardo Yamada, Julian L. Wichmann, U. Joseph Schoepf, Akos Varga-Szemes, Andrew C. Stubenrauch, Stefanie Mangold, Carlo N. De Cecco, Stephen R. Fuller, Konstantin Nikolaou, Thomas J. Vogl, Damiano Caruso, Thomas M. Todoran
Rok vydání: 2016
Předmět:
Adult
Male
medicine.medical_specialty
Computed Tomography Angiography
medicine.medical_treatment
CT angiography
diagnostic accuracy
dual-energy
stent visualization
virtual monochromatic imaging
Lumen (anatomy)
Signal-To-Noise Ratio
030204 cardiovascular system & hematology
Sensitivity and Specificity
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
Restenosis
Ischemia
medicine
Humans
Radiology
Nuclear Medicine and imaging
Aged
Neuroradiology
medicine.diagnostic_test
business.industry
Ultrasound
Graft Occlusion
Vascular
Reproducibility of Results
Stent
Interventional radiology
General Medicine
Middle Aged
medicine.disease
Lower Extremity
Angiography
Radiographic Image Interpretation
Computer-Assisted
Female
Stents
Monochromatic color
Radiology
business
Nuclear medicine
Algorithms
Zdroj: European Radiology. 26:4380-4389
ISSN: 1432-1084
0938-7994
DOI: 10.1007/s00330-016-4304-8
Popis: To evaluate the impact of noise-optimized virtual monochromatic imaging (VMI+) on stent visualization and accuracy for in-stent re-stenosis at lower extremity dual-energy CT angiography (DE-CTA). We evaluated third-generation dual-source DE-CTA studies in 31 patients with prior stent placement. Images were reconstructed with linear blending (F_0.5) and VMI+ at 40–150 keV. In-stent luminal diameter was measured and contrast-to-noise ratio (CNR) calculated. Diagnostic confidence was determined using a five-point scale. In 21 patients with invasive catheter angiography, accuracy for significant re-stenosis (≥50 %) was assessed at F_0.5 and 80 keV-VMI+ chosen as the optimal energy level based on image-quality analysis. At CTA, 45 stents were present. DSA was available for 28 stents whereas 12 stents showed significant re-stenosis. CNR was significantly higher with ≤80 keV-VMI+ (17.9 ± 6.4–33.7 ± 12.3) compared to F_0.5 (16.9 ± 4.8; all p
Databáze: OpenAIRE
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