PRE-BEAMFORMING RF DATA CHANNEL

hi all,
I am currently working on a scientific research activities in the field of ultrasound and, for scientific purposes, I'd like to test an algorithm developed by me, on ultrasound data.
To continue my studies I need PRE-BEAMFORMING RF DATA CHANNEL, to perform experiments that will be useful to my research, but I'm having some difficulty to find ones.
For this I thought that could not to be very difficult build some device to acquire that provide these data.

Than, I need some help, because I need of a probe (but I do not know where buy it) and some thing to connect and drive the probe from a my pc just to send and receive raw pre-beamforming rf data.

Thank you a lot
any suggestion is wellcome
Gg