Ultrasound of Liver, Spleen, Urinary Flashcards
When doing ultrasound, you should image all structures in
2 planes- 90 degrees to each other
1) long axis (sagittal)
2) Short axis (transverse)
High frequency transducers have better or worse resolution
Better worse resolution
High frequency transducers have more or less penetration
less penetration
What transducers are better for superficial structures
High frequency
-better resolution and less penetration (depth)
better resolution and less penetration
High frequency transducers
better penetration, less resolution
Low Frequency transducers
What transducers are better for deeper structures
Low Frequency
-low resolution, good penetration
less echogenic, more black
hypoechoic
more echogenic, more white
hyperechoic
same echogenicity
isoechoic
no echoes (black)
anechoic
Does spleen or liver have more echogenicity
spleen
does renal cortex or medulla have more echogenicity
cortex
does the liver or kidney have more echogenicity
liver but it is similar to the kidney cortex
What is the echogenicity of the liver
generally moderate echogenicity/ hypoechoic organ
what structures within the liver, are well defined on ultrasound
portal vein walls
T/F: hepatic arteries and veins are well seen on radiographs
False- often dont see arteries
need to use doppler
the portal vein walls are seen though
The liver is hypoechoic to
the spleen
T/F: the liver is isoechoic to the renal cortex
True
The gallbladder is located between the
right medial and quadrate lobes
What does the gallbladder look like on ultrasound
1) ovoid to spherical
2) thin hyperechoic wall with anechoic contents
3) some gravity dependent debris is okay
T/F: bilobed gallbladder variants is abnormal in cats
False- could be a normal variant
What might cause hypoechoic liver?
-Congestion
-Lymphoma
-Acute Hepatitis
-Histoplasmosis
-Rickettsia
-IMHA
What does a hypoechoic liver look like
Stormy night appearance
-portal veins stand out and give this
