Cece wrote:How can you tell if an image is perpendicular to the arch or not...
There are 2 ways:
1: look at the upper angle formed by the catheter; the more acute the further away from perpendicular you are, the smoother angle (obtuse) you see the closer to 90% you are.
2: look at the relative distance from the posterior Azygous to the anterior (SVC). the further apart they are the closer to perpendicular you are.
see the picture below and you can decide which is which.
Nunzio wrote: Rokkit wrote:
Everybody here brings happiness, somebody by coming,others by leaving. PPMS since 2000<br />