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Noninvasive Visualization of Coronary Arteries Using Contrast-Enhanced Multidetector CT: Influence of Heart Rate on Image Quality and Stenosis Detection

Tom Giesler1, Ulrich Baum2, Dieter Ropers1, Stefan Ulzheimer3, Evelyn Wenkel2, Maria Mennicke1, Werner Bautz2, Willi A. Kalender3, Werner G. Daniel1 and Stephan Achenbach1

1 Department of Internal Medicine II, Universität Erlangen-Nuernberg, Ulmenweg 18, D-91054 Erlangen, Germany.
2 Institute of Diagnostic Radiology, Universität Erlangen-Nuernberg, D-91054 Erlangen, Germany.
3 Institute of Medical Physics, Universität Erlangen-Nuernberg, D-91054 Erlangen, Germany.



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  		Fig. 1A. —Cross-sectional multidetector CT (MDCT) of patients with suspected coronary artery disease. Cross-sectional MDCT scan of 70-year-old man shows proximal left anterior descending coronary artery (arrow) without motion artifacts. Heart rate was 67 beats/min.

 


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  		Fig. 1B. —Cross-sectional multidetector CT (MDCT) of patients with suspected coronary artery disease. Cross-sectional MDCT scan of 67-year-old man shows mid right coronary artery (arrow) without motion artifacts. Heart rate was 62 beats/min.

 


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  		Fig. 1C. —Cross-sectional multidetector CT (MDCT) of patients with suspected coronary artery disease. Cross-sectional MDCT scan of 66-year-old man shows proximal left anterior descending coronary artery. Visualization of artery is affected by severe motion artifact (arrow). Heart rate was 89 beats/min.

 


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  		Fig. 1D. —Cross-sectional multidetector CT (MDCT) of patients with suspected coronary artery disease. Cross-sectional MDCT scan of 74-year-old man shows mid right coronary artery, visualization of which is severely affected by motion artifact (arrow). Heart rate was 78 beats/min.

 


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  		Fig. 2. —Multiplanar multidetector reconstruction of 62-year-old woman with suspected coronary artery disease shows clearly visualized right coronary artery with no motion artifacts up to the distal segments. Heart rate was 59 beats/min.

 


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  		Fig. 3. —Multiplanar multidetector reconstruction of 51-year-old man with suspected coronary artery disease shows right coronary artery. Motion artifacts are visible (arrows). Heart rate was 72 beats/min.

 


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  		Fig. 4A. —56-year-old man with coronary artery disease. Heart rate was 65 beats/min. Multiplanar multidetector (MDCT) reconstruction shows right coronary artery (RCA) and left main artery and left anterior descending coronary artery (LAD) with proximal high-grade stenosis (arrow).

 


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  		Fig. 4B. —56-year-old man with coronary artery disease. Heart rate was 65 beats/min. Invasive coronary angiogram confirms MDCT finding and shows high-grade stenosis of the proximal left anterior descending coronary artery (arrows).

 


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  		Fig. 5A. —48-year-old man with coronary artery disease. Heart rate was 61 beats/min. Multiplanar multidetector (MDCT) reconstruction shows right coronary artery with severe stenosis (arrow).

 


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  		Fig. 5B. —48-year-old man with coronary artery disease. Heart rate was 61 beats/min. Invasive coronary angiogram confirms MDCT finding and shows severe stenosis of right coronary artery (arrow).

 

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