256-Slice CT Angiographic Evaluation of Coronary Artery Bypass Grafts: Effect of Heart Rate, Heart Rate Variability and Z-Axis Location on Image Quality
| Autor: | Marie-Pierre Sylvestre, Ernst J. Rummeny, Gilles Soulez, Louis-Mathieu Stevens, Carl Chartrand-Lefebvre, Sandra Larrivée, Anne S Chin, Bettina M. Gramer, Patricia Diez Martinez, Nicolas Noiseux |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Male
Cardiothoracic Surgery Image quality Cardiovascular Procedures lcsh:Medicine Computed tomography Bypass grafts Coronary Artery Disease Coronary Angiography Vascular Medicine Diagnostic Radiology Heart Rate Risk Factors Medicine and Health Sciences Heart rate variability Cardiovascular Imaging Coronary Artery Bypass lcsh:Science Autografts Tomography Multidisciplinary medicine.diagnostic_test Radiology and Imaging Middle Aged medicine.anatomical_structure surgical procedures operative Research Design Physical Sciences Cardiology Female Artifacts Statistics (Mathematics) Artery Research Article medicine.medical_specialty Clinical Research Design Surgical and Invasive Medical Procedures Research and Analysis Methods Diagnostic Medicine Internal medicine Heart rate medicine Humans Statistical Methods Aged business.industry lcsh:R Computed Axial Tomography Coronary arteries lcsh:Q business Tomography X-Ray Computed Mathematics Follow-Up Studies |
| Zdroj: | PLoS ONE PLoS ONE, Vol 9, Iss 3, p e91861 (2014) |
| ISSN: | 1932-6203 |
| Popis: | Purpose The objective of this study is to assess the effect of heart rate, heart rate variability and z-axis location on coronary artery bypass graft (CABG) image quality using a 256-slice computed tomography (CT) scanner. Methods A total of 78 patients with 254 CABG (762 graft segments) were recruited to undergo CABG assessment with 256-slice CT and prospective ECG-gating. Two observers rated graft segments for image quality on a 5-point scale. Quantitative measurements were also made. Logistic and cumulative link mixed models were used to assess the predictors of graft image quality. Results Graft image quality was judged as diagnostic (scores 5 (excellent), 4 (good) and 3 (moderate)) in 96.6% of the 762 segments. Interobserver agreement was excellent (kappa ≥0.90). Graft image quality was not affected by heart rate level. However, high heart rate variability was associated with an important and significant image quality deterioration (odds ratio 4.31; p = 0.036). Distal graft segments had significantly lower image quality scores than proximal segments (p ≤ 0.02). Significantly higher noise was noted at the origin of the mammary grafts (p = 0.001), owing to streak artifacts from the shoulders. Conclusion CABG imaging with 270-msec rotation 256-slice CT and prospective ECG-gating showed an adequate image quality in 96.6% of graft segments, and an excellent interobserver agreement. Graft image quality was not influenced by heart rate level. Image quality scores were however significantly decreased in patients with high heart rate variability, as well as in distal graft segments, which are closer to the heart. |
| Databáze: | OpenAIRE |
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