The hepatic polygonal
cells rapidly remove the radiopharmaceutical from the bloodstream and adds it to
the bile that normally flows through the network of small tubes (bile ducts)
then releases the tracer into the beginning of the small intestine (duodenum).
Mild sedation as needed
Large field of view gamma
camera with low energy all purpose
collimator and a 25% window.
99mTc disofenin or other
Tc-IDA iminodiacetic acid
Normally there is swift
and homogeneous liver uptake and excretion
into the small bowel with visualization of the biliary duct system within 60
If bowel is not visualized within 60 min, return the horse to the stall and allow him to eat. Acquire images later 2, 4, and 8 hours. An image at 24 hours may be helpful if the bowel is still not visible at 8 hours, however, count statistics may not be adequate to acquire an image in a timely manner.