Its entirely dependent on the college you are choosing to take admission in. In general for Master in Ultrasonography/Imaging can be done by the BSc Medical Imaging graduates only. SO its most likely you aren't eligible but if you wish you can check the eligibility criteria of the college you want to study in.

TO know more about the courses of ultrasonography visit the link below:

https://www.careers360.com/courses/ultrasonography-course

I hope this answer helps. All the very best for your future endeavors!