In the soft tissue phase there is moderate pooling of radioisotope in the palmar aspect of the right front fetlock seen in the 4 minute and later images.  When compared to the bone phase images, pooling of radioisotope is slightly more prominent in soft tissue indicating both soft tissue and bony involvement.  The pooling of isotope in the proximal palmar pouch likely indicates bony and cartilaginous debris exits in this location which is seen in horses with more advanced osteoarthritis and cartilage damage.