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Dual-Energy and Low-kVp CT in the Abdomen

¹ Department of Radiology and Biomedical Imaging, University of California, San Francisco, Box 0628, M-372, 505 Parnassus Ave., San Francisco, CA 94143-0628.
² Department of Radiology, Alexandra Hospital, Singapore.
³ Department of Radiology, Mayo Clinic, Rochester, MN.

OBJECTIVE. The purpose of this article is to discuss the influence of tube potential on CT images and explore the potential impact of dual-energy CT on imaging of the abdomen and pelvis.

CONCLUSION. Low peak tube voltage (kVp) settings provide high conspicuity of contrast materials at CT but may result in high image noise, particularly in larger patients. Material decomposition at dual-energy CT can differentiate renal stones by their composition, quantify tissue iron stores, improve the detection of pathologic hyperenhancement, and reduce contrast material and radiation dose compared with conventional CT. Further clinical research and technique refinement will be needed as the usage of these exciting technologies spreads.

Keywords: abdomen • CT • dual-energy • nephrolithiasis • radiation dose

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