New hybrid reformations of peripheral CT angiography: do we still need axial images?
Ruediger Egbert Schernthaner1, Florian Wolf1, Gabriel Mistelbauer2
1Section of Cardiovascular and Interventional Radiology, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria.
Purpose:
To quantify the detectability of peripheral artery stenosis on hybrid CT angiography (CTA) reformations.
Methods:
Hybrid reformations were developed by combining multipath curved planar reformations (mpCPR) and maximum intensity projections (MIP). Fifty peripheral CTAs were evaluated twice: either with MIP, mpCPR and axial images or with hybrid reformations only. Digital subtraction angiography served as gold standard.
Results:
Using hybrid reformations, two independent readers detected 88.0% and 81.3% of significant stenosis, respectively. However, CTA including axial images detected statistically significant more lesions (98%).
Conclusion:
Peripheral CTA reading including axial images is still recommended. Further improvement of these hybrid reformations is necessary.
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