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© 2008 by the American Institute of Ultrasound in Medicine
J Ultrasound Med 27:387-394 • 0278-4297

Analysis of Focal Spared Areas in Fatty Liver Using Color Doppler Imaging and Contrast-Enhanced Microvessel Display Sonography

Li-Ping Liu, MD, Bao-Wei Dong, MD, Xiao-Ling Yu, MD, Da-Kun Zhang, MD, Xin Li, MD and Hua Li, MD

Department of Ultrasound, First hospital of Shanxi Medical University, Taiyuan, China (L.P.L.); and Department of Ultrasound, Chinese People’s Liberation Army General Hospital, Beijing, China (B.-W.D., X.-L.Y., D.-K.Z., X.L., H.L.).

Address correspondence to Bao-Wei Dong, MD, Department of Ultrasound, Chinese People’s Liberation Army General Hospital, 28 Fuxing Rd, 100853 Beijing, China. E-mail: dongbw301{at}yahoo.com.cn, liuliping1600{at}sina.com

Objective. The purpose of this study was to investigate whether focal fatty sparing (FFS) formation in the liver relates to aberrant blood flow. Methods. Sixty-three FFSs of the liver in 52 patients were examined by color Doppler flow imaging and contrast-enhanced microvessel display sonography. The 63 FFSs included 16 FFSs in the porta hepatis, 14 FFSs around the gallbladder fossa, and 33 other FFSs. The control group included patients with a diagnosis of fatty liver but no FFSs or focal lesions near the porta hepatis. Results. Fourteen of 16 FFSs in the porta hepatis showed venous blood toward those areas that were differentiated from the portal and hepatic veins. Focal fatty sparings in the hilus hepatis correlated with aberrant veins, having a statistical significance compared with the control group (P < .0001). Seven of 14 FFSs around the gallbladder fossa contained blood vessels, 5 of them veins and the remaining 2 arteries. Two FFSs were located around hemangiomas. Three FFSs were located around maldeveloped vessels. Conclusions. The blood supply to an FFS in the porta hepatis may be correlated with aberrant veins. Focal fatty sparings around the gallbladder fossa may be associated with aberrant blood flow.

Key Words: contrast agent • fatty liver • focal fatty sparing • microvessel • sonography

Abbreviations: CDFI, color Doppler flow imaging • CPS, contrast pulse sequencing • CT, computed tomography • FFS, focal fatty sparing • MI, mechanical index • MRI, magnetic resonance imaging • MVD, microvessel display

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Copyright © 2008 by the American Institute of Ultrasound in Medicine.