To neuro doctor I had some weeks ago CTA of the neck including base of the brain COW and it was clear And today i had another CTA of COW , so what does cta of cow mean, does it mean all arteries of the brain or just circle of willis, like does it include pica , ventricles arteries the stem arteries and small ones..., because if it does not then it is useless , more radiation for nothing
Hello. A CTA of the brain does include all the blood vessels. Some techniques and reconstructions focus specifically on the COW because this is where most aneurysms occur.
But a CTA will give your doctors a good look at the entire circulatory system of the brain.
so today i had a cta of cow , what does that include
does it include all blood vessles in the brain including ventricles basilar and pica
i am asking this because i suspect stem issue and not cow issue
then the test is useless
Yes, the CTA includes everything. The resolution of the scanner may preclude the ability to create "reconstructions" of the very small caliber vessels in the brain. However, it does image the entire brain and then this data is used to create a virtual picture of the COW, because this is where most significant aneurysms occur.
It also images the brainstem. Any aneurysm large enough to cause symptoms would be expected to be seen.
So I am covered with this test ,
Is 3t mra with contrast better or not than cta cow for the pathology of brain vessels specially ventricles and pica
CTA and MRA are comparable in sensitivity. It depends somewhat on imaging equipment, techniques and the size of the aneurysms. CTA has been studied less extensively than MRA, but published data of CTA indicate that spiral CTA is at least as good, if not more accurate than MRA, with overall aneurysm detection rates of 85–98%
The gold standard remains angiography, of course.