What frequency range is typically used for the transducer when visualizing the aortic arch?

The frequency range of 2.5 to 5.0 MHz is optimal for visualizing the aortic arch due to the balance it provides between image resolution and tissue penetration. Lower frequencies, like those below 2.5 MHz, can penetrate deeper tissues, which is beneficial in certain scenarios, but they do not provide the fine detail necessary for assessing structures like the aortic arch.

On the other hand, higher frequencies, such as those in the ranges of 5.0 to 10.0 MHz, yield excellent resolution and detail but have limited penetration capabilities. This makes them less effective for visualizing larger structures like the aortic arch, where depth and the characteristics of surrounding tissue need to be considered. Thus, the frequency range of 2.5 to 5.0 MHz strikes the necessary compromise for both resolving power and the ability to visualize the anatomy at the depth where the aortic arch resides.