Dual-source computed tomography: advances of improved temporal resolution in coronary plaque imaging |
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Authors: | Reimann Anja J Rinck Daniel Birinci-Aydogan Ayser Scheuering Michael Burgstahler Christof Schroeder Stephen Brodoefel Harald Tsiflikas Ilias Herberts Tina Flohr Thomas Claussen Claus D Kopp Andreas F Heuschmid Martin |
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Affiliation: | Department of Diagnostic Radiology, Eberhard-Karls-University of Tuebingen, Tuebingen, Germany. anja.reimann@med.uni-tuebingen.de |
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Abstract: | OBJECTIVES: The aim of this study was to quantify image quality gains of a moving coronary plaque phantom using dual-source computed tomography (DSCT) providing 83 milliseconds temporal resolution in direct comparison to 64 slice single-source multidetector CT (MDCT) with a temporal resolution of 165 milliseconds. MATERIALS AND METHODS: Three cardiac vessel phantoms with fixed 50% stenosis and changing plaque configurations were mounted on a moving device simulating cardiac motion. Scans were performed at a simulated heart frequency of 60 to 120 bpm. Image quality assessment was performed in different anatomic orientations inside a thoracic phantom. RESULTS: A significant improvement of image quality using the DSCT could be found (P=0.0002). Relevant factors influencing image quality aside from frequency (P=0.0002) are plaque composition (P<0.0001), as well as orientation (P<0.0001). CONCLUSION: Scanning with 83 milliseconds temporal resolution improved image quality of coronary plaque at higher heart frequencies. |
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