Is the ultrasound verification process important before the procedure?

While researching Ulthera, I realized that the process of checking the skin condition before the procedure is just as important as the equipment itself.

Since the thickness of fat or tissue varies by area of ​​the face, I am curious if you actually verify these differences to determine the depth or scope of the procedure.

If you received explanations regarding ultrasound checks or regional treatment plans during your consultation, I would appreciate it if you could let me know what points I should check.