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Diagnostic ultrasound ( PDFDrive )

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646 PART II Abdominal and Pelvic Sonography

A B C

D

E

F

G

H

I

FIG. 18.25 Liver Infections in Three Patients: Solitary Abscess. (A)-(C) Air-containing abscess (arrows) in segment IV of liver. (A) Transverse

ultrasound, (B) CT, and (C) plain ilm show air within the abscess, on ultrasound appearing as an echogenic interface associated with dirty shadowing.

(D)-(F) Multifocal abscess. (D) Transverse and (E) sagittal sonograms show multiple small parenchymal collections (arrows). (F) Corresponding

CT scan shows subtle rim enhancement (arrow). (G)-(I) Ascending cholangitis. (G) Transverse sonogram shows increased periductal echogenicity

(arrows) of a right intrahepatic bile duct. (H) Oblique sonogram shows thickening of the common hepatic duct, with increased echogenicity of the

periductal fat (arrows). (I) T1-weighted contrast-enhanced magnetic resonance image shows periductal enhancement (arrows).

A

B

FIG. 18.26 Atypical Infarct. (A) Transverse sonogram shows an atypical infarct (arrow) appearing as a round mass associated with a surrounding

hypoechoic halo. (B) Correlative CT shows that the infarct (arrow) is avascular, with a surrounding parenchymal blush. (With permission from

Crossin JD, Muradali D, Wilson SR. US of liver transplants: normal and abnormal. Radiographics. 2003;23[5]:1093-1114. 5 )

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