I'm so sorry to hear that they found something on your kidneys. That must be very scary! What makes you curious about microbubble ultrasounds? I don't have personal experience with this, but we do have this forum page where other members have been discussing the different types of diagnostic tests they've had done. Feel free to ask your question there and hopefully someone will be able to respond with some insight! https://chronic-kidney-disease.net/forums/tests-for-diagnosis.
Please know that we're here for you should you need support. Sending you healing thoughts. - Kat (Team Member)