Quantitative and qualitative evaluation of the influence of different table feeds on visualization of peripheral arteries in CT angiography of aortoiliac and lower extremity arteries
| Autor: | Bernd Frericks, A. Oldenburg, Karl-Jürgen Wolf, Thomas Albrecht, Bernhard C. Meyer, C. Ribbe, W. Hopfenmüller |
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| Rok vydání: | 2008 |
| Předmět: |
Adult
Male medicine.medical_specialty Aortography Iliac Artery Sensitivity and Specificity Bolus (medicine) medicine Humans Radiology Nuclear Medicine and imaging In patient Aged Neuroradiology Aged 80 and over Peripheral Vascular Diseases medicine.diagnostic_test business.industry Ultrasound Angiography Reproducibility of Results Interventional radiology General Medicine Middle Aged medicine.disease Abdominal aortic aneurysm Peripheral Radiographic Image Enhancement Lower Extremity Radiographic Image Interpretation Computer-Assisted Female Radiology business |
| Zdroj: | European Radiology. 18:1546-1555 |
| ISSN: | 1432-1084 0938-7994 |
| DOI: | 10.1007/s00330-008-0914-0 |
| Popis: | The influence of different table feeds (TF) on vascular enhancement and image quality in patients undergoing lower extremity runoff-CTA for peripheral artery occlusive disease (PAOD), acute ischemia (AI) or abdominal aortic aneurysm (AAA) with PAOD was investigated retrospectively. One hundred eighty-five patients (PAOD: n = 132; AI: n = 40; AAA: n = 13) underwent 16-detector runoff-CTA (120 kV; 140 mAs; rotation time 0.5 s, collimation 16 x 1.5 mm) using different TF (30 mm/s: n = 25; 40 mm/s: n = 91; 48 mm/s: n = 36; 56 mm/s: n = 33). Vascular enhancement of the large arteries was measured every 10 cm along the z-axis from the upper abdomen to the toe. Arterial enhancement in the distal lower leg was compared (ANOVA, Bonferroni post-test). Qualitative assessment of bolus timing was performed independently by two radiologists. The study was IRB approved. In patients with PAOD or AI, enhancement of calf arteries using a TF of 48 mm/s (278 +/- 79 HU) was significantly higher in comparison to two slower TF (30 mm/s: 201 +/- 70 HU, P0.001; 40 mm/s: 251 +/- 79 HU, P0.05; 56 mm/s: 261 +/- 57 HU, NS) and the fewest noninterpretable arterial segments below the knee were observed with a TF of 48 mm/s (reader 1: 5/121 = 4.1%; reader 2: 4/121 = 3.3%). In patients with AAA, the fewest nondiagnostic segments occurred with a TF of 30 mm/s (2/12 = 17%, both readers) and 40 mm/s (4/24 = 17%, both readers). A TF of 48 mm/s provided the best synchronization of CT data acquisition and contrast bolus propagation and thus the best image quality in patients with PAOD and AI. In patients with AAA, a slower TF of 30 mm/s provided better image quality than faster CT protocols. |
| Databáze: | OpenAIRE |
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