Testing ultrasound to find cancer returning after heat treatment

This trial is testing whether contrast-enhanced ultrasound (a special type of ultrasound that uses an injectable tracer called Lumason to see blood flow) can reliably detect kidney cancer that comes back after ablation therapy — a heat-based treatment that destroys cancer cells. Researchers want to know if this ultrasound approach works as well as, or better than, standard CT or MRI scans for finding recurrent cancer.

After ablation therapy, patients need regular imaging to make sure their cancer hasn't returned. Standard imaging methods like CT and MRI work, but researchers want to find out if this medication-enhanced ultrasound could be a simpler, safer, or more accurate alternative for detecting recurrence.