Dual Source CT Carotid Stenosis diagnosed with Dual Energy

SOMATOM Definition Dual Energy Scanning

E. Hendrich, MD; A. Will, MD; St. Martinoff, MD
Department of: Radiology and Nuclearmedicine, German Heart Center, Munich, Germany
 |  2008-08-01


A 65 year-old woman presented with complaints about recurrent vertigo. Weeks ago, the leading stenosis in the right internal carotid artery (ICA) had been stented. During routinely performed ultrasound examination a stenosis was also seen in the left ICA. To verify these results and for planning of interventional PTA (percutanuous transluminal angioplasty) and stent positioning in the left ICA a CT-Angiography with Dual Energy technology has been accomplished subsequently.


CT-Angiography proved the result of the ultrasound examination. A quite severe stenosis in the proximal left ICA, with cranio-caudal extension of 13 mm, due to a semicircular atheromatous plaque could be confirmed. A restenosis of the implanted stent in the proximal right ICA could be ruled out. Moreover, other profound arteriosclerotic alterations in the circle of willis could be excluded by CT-Angiography.


syngo DE Direct Angio delivers reliable information about vessel status and therefore plays an important role in vessel imaging. The subtraction of bone structures and parallel visualization of calcified plaque provides the detailed analysis of vessel lumen and plaque. A very positive effect is the comfortable integration of Dual Energy into the post processing procedure. Hence syngo DE Direct Angio has become an inherent part of our vascular imaging workflow.

Examination Protocol

SOMATOM Definition
Scan area
Scan length 281 mm
Scan time 6 s
Scan direction Caudo-cranial
Effective mAs
Rotation time
0.33 s
Slice collimation
Reconstructed slice thickness
0.75 mm
Increment 0.6

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