Dual Source peripheral Run-off
SOMATOM Definition vascular CTA
Hatem Alkadhi, M.D.
Institute of Diagnostic Radiology, University Hospital Zurich, Switzerland
A 71-year-old man arrives in the University Hospital Zurich with a long history of diabetes. After short walks of 100 meter the patient complains of severe pain in the lower extremities, forcing him to pause. In the initial ultrasound diagnosis a severe occlusion of the left arteria femoralis could be detected. For further verification a CT scan is requested immediately. The patient was scheduled for a CTA of the peripheral vasculature with the SOMATOM Definition. A contrast enhanced CTA scan of the lower extremities was performed on the DSCT.
The excellent image quality allowed precise visualization of the entire vasculature tree. The Dual Source run-off study permits a fast localization of the origin of the pain with respect to severe calcifications of left arteria femoralis. The corresponding collateral vessels could be visualized, explaining the relive of patient’s pain after pausing motion. Based on this single study, the patient was considered a candidate for endovascular repair.
The SOMATOM Definition utilizes Siemens‘ proprietary z-Sharp™ Technology enabling CT images with highest diagnostic detail, clarity, and speed. z-Sharp Technology significantly increases resolution without a corresponding increase in dose provides, permitting the industry’s highest isotropic resolution of 0.33 mm at any scan and rotation speed, and at any position within the scan field.
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