Abstract
Recent technical developments in multislice computed tomography (CT) have opened new perspectives in the non-invasive investigation of supra-aortic extracranial and intracranial vessels. Simultaneous acquisition of 64 slices at 0.33 seconds rotation times has made long scan ranges at high spatial resolution feasible. With the introduction of Dual Source CT in 2006, in which two tubes and detectors are mounted orthogonally, it is now possible to acquire one axial image by a gantry rotation of 90° instead the 180° needed in single-source scanners. This cuts acquisition time by half, which is an important factor especially in cardiac imaging. It is also possible to run the two tubes at different voltages — the so-called spiral dual energy CT mode (e.g. 140 and 80 kV) — in order to obtain different attenuations for material decomposition. Multiple dual-energy applications are currently under evaluation: material differentiation, bone removal, iodine quantification, perfusion mapping and plaque imaging to name a few.1–6
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© 2008 Springer Medizin Verlag Heidelberg
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Morhard, D., Johnson, T.R.C., Becker, C.R. (2008). Dual Energy: CTA of Head and Neck. In: Seidensticker, P.R., Hofmann, L.K. (eds) Dual Source CT Imaging. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77602-4_18
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DOI: https://doi.org/10.1007/978-3-540-77602-4_18
Publisher Name: Springer, Berlin, Heidelberg
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