Diagnostic Ultrasound - Abdomen and Pelvis

Urolithiasis
(Left) Longitudinal US of the
left kidney shows dilated
calyces ſt containing multiple
echogenic stones st causing
posterior acoustic shadowing
. (Right) Transverse color
Doppler US of the left kidney
in the same patient
demonstrates twinkling
artifact st posterior to
multiple echogenic stones
in dilated calyces ſt.
Diagnoses: Urinary Tract
(Left) Coronal NECT in the
same patient shows a large
staghorn calculus ſt within
the left renal collecting
system. (Right) Another
coronal NECT in the same
patient partially shows the
large staghorn calculus ,
which is causing obstruction
(dilated calyces) ſt.
(Left) Coronal Tc-99m MAG3
(posterior) in the same patient
shows delayed clearance from
the left kidney . No
clearance of radiotracer after
Lasix administration indicated
complete obstruction. (Right)
Coronal NECT of the abdomen
and pelvis in a different
patient reveals a calculus
within the proximal left ureter
. Soft tissue attenuation
surrounding the calcification
("soft tissue rim" sign) st
represents ureteral wall
edema.
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