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Multi–Detector Row CT Angiography of the Brain at Various Kilovoltage Settings¹

¹ From the Institutes of Clinical Radiology (B.B.E.W., R.T.H., K.H., M.F.R.) and Neuroradiology (R.B.), Klinikum Grosshadern, University of Munich, Marchioninistr 15, D-81377 Munich, Germany; and Center for Statistical Sciences, Brown University, Providence, RI (B.S., J.D.B.). Received April 7, 2003; revision requested June 24; final revision received September 17; accepted October 21. Address correspondence to B.B.E.W. (e-mail: b.ertl-wagner@t-online.de).

View larger version (82K): [in a new window]   Figure 1a. (a) Coronal and (b) sagittal reconstructions of a 140-kV multi-detector row CT angiogram obtained in a 72-year-old woman with a thrombembolic occlusion of the M1 segment of the right middle cerebral artery. Both arterial and venous vessels can be clearly delineated, even when in close proximity to the skull base.

View larger version (89K): [in a new window]   Figure 1b. (a) Coronal and (b) sagittal reconstructions of a 140-kV multi-detector row CT angiogram obtained in a 72-year-old woman with a thrombembolic occlusion of the M1 segment of the right middle cerebral artery. Both arterial and venous vessels can be clearly delineated, even when in close proximity to the skull base.

View larger version (104K): [in a new window]   Figure 2a. (a) Coronal and (b) sagittal reconstructions of a 120-kV multi-detector row CT angiogram obtained in a 71-year-old woman without abnormal intracranial vasculature. The vessels in proximity to the skull base and the small subsegmental arteries are discerned less clearly than with the 140-kV setting but are better delineated than with the 80-kV setting.

View larger version (80K): [in a new window]   Figure 2b. (a) Coronal and (b) sagittal reconstructions of a 120-kV multi-detector row CT angiogram obtained in a 71-year-old woman without abnormal intracranial vasculature. The vessels in proximity to the skull base and the small subsegmental arteries are discerned less clearly than with the 140-kV setting but are better delineated than with the 80-kV setting.

View larger version (102K): [in a new window]   Figure 3a. (a) Coronal and (b) sagittal reconstructions of an 80-kV multi-detector row CT angiogram obtained in a 58-year-old man without abnormal intracranial vasculature. The vessels in proximity to the skull base and the small subsegmental arteries are less clearly discerned than with the 120-kV and 140-kV settings.

View larger version (106K): [in a new window]   Figure 3b. (a) Coronal and (b) sagittal reconstructions of an 80-kV multi-detector row CT angiogram obtained in a 58-year-old man without abnormal intracranial vasculature. The vessels in proximity to the skull base and the small subsegmental arteries are less clearly discerned than with the 120-kV and 140-kV settings.