Diagnostic ultrasound ( PDFDrive )

A
B
FIG. 8.25 Use of Contrast-Enhanced Ultrasound
(CEUS) to Distinguish Between Abscess
and Phlegmon; Exams in Two Patients. Both
examinations include a contrast-enhanced image
(left) and low-resolution gray-scale image (right).
(A) Hypoechoic mass on baseline is completely
avascular on CEUS diagnostic for a luid-containing
abscess (A). (B) Hypoechoic mass is uniformly
vascular on CEUS, diagnostic for a hypervascular
inlammatory mass, a phlegmon. (With permission
from Wilson S. Evaluation of the small intestine
by ultrasonography. In: Gourtsoyiannis N, editor.
Radiologic imaging of the small intestine. Heidelberg:
Springer-Verlag; 2002. pp. 73-86. 18 )
B
G
B
M
A
B
G
V
R
C
D
FIG. 8.26 Fistulas in Patients With Crohn Disease. (A) and (B) Enterovesical istulas. (A) Tract between the abnormal gut (G) and the
bladder (B). An air bubble within shows as a bright, echogenic focus (arrow). (B) Hypoechoic tract connects an inlammatory mass (M) to the
bladder (B). (C) Enterocutaneous istula. Hypoechoic tract runs from a loop of abnormal gut (G) to the skin surface (arrow). (D) Rectovaginal
istula on transvaginal sonogram appears as a bright, air-containing tract (arrow) coursing from the rectum (R) to the vagina (V). See also Video
8.12 for enteroenteric istula.