My horse had scintigraphy three years ago, dont know if nuclear scint. is something different though. Horse was given radioactive stuff which is supposed to show hot spots when scanned.(where take up of materials is greatest) Was used for lameness investigations for mine. Horse had to stay at yard for two or three days and isolated because his poo would be radioactive !
Used as a diagnostic tool often when lameness can not be attributed to one particular area. Jesper went for scintigraphy to diagnose suspensory ligament damage. The lameness showed as being in his back but nerve blocks were originally unsuccessful so scintigraphy was used to pin point the problem area. It works by showing up 'hot spots' where the body is over active. Once a hot spot has been identified further investigation is often required (in Jesper's case ultrasound) to confirm the problem.
The only downside of scintigraphy is it isn't overly precise. Most horses will have some hot spots, it's just whether they affect them. Worth a try definitely though.
Yes, a radioactice isotope is given to the horse which binds to the bone, and more so in the areas that are most active e.g. where there has been injury and that area is now actively healing etc.
So if your horse for example has a slight fracture to it's iliac wing it will show up on the scan more brightly etc which lets the vets know that there is increased uptake up the radioactive substance in this area but it is not a definitive diagnosis.
It is very useful to use when an area of lameness can not be found using nerve blocks, x-rays, ultrasound etc.
Nuclear Scintigraphy is another name for a Bone Scan.