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- Title
Dynamic myocardial stress perfusion imaging using fast dual-source CT with alternating table positions: initial experience.
- Authors
Bamberg F; Klotz E; Flohr T; Becker A; Becker CR; Schmidt B; Wintersperger BJ; Reiser MF; Nikolaou K; Bamberg, Fabian; Klotz, Ernst; Flohr, Thomas; Becker, Alexander; Becker, Christoph R; Schmidt, Bernhard; Wintersperger, Bernd J; Reiser, Maximilian F; Nikolaou, Konstantin
- Abstract
<bold>Objective: </bold>To detail the principles of using model-based determination of regional myocardial blood flow (MBF) by computed tomography (CT) and demonstrate its in vivo applicability.<bold>Methods: </bold>Dual-source CT was performed with a dynamic protocol comprising acquisition with alternating table positions in ECG-triggered end-systolic timing every second for 30 s. The results of two reconstructions were merged into one final image stack (coverage 73 mm), with low spatial frequency components from a 360 degrees reconstruction and high spatial frequency components from a dual-source cardiac partial image reconstruction. A parametric deconvolution technique was used to fit the time-attenuation curves (TAC), the maximum slope of which was used to derive MBF.<bold>Results: </bold>One study participant underwent dynamic myocardial stress perfusion imaging (9.6 mSv) followed by invasive coronary angiography and measurement of fractional flow reserve as the gold standard. MBF was 159 ml/100 ml/min in the non-ischaemic anterolateral and 86 ml/100 ml/min in the inferoseptal ischaemic wall.<bold>Conclusion: </bold>This first evaluation indicates that mathematical modelling of voxel TACs can potentially be used to quantify differences in MBF in a clinical setting. If confirmed in feasibility studies, cardiac CT may allow for parallel assessment of morphology and haemodynamic relevance of coronary artery disease.
- Publication
European Radiology, 2010, Vol 20, Issue 5, p1168
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-010-1715-9