Limitations
While he is pleased with the initial success of the technology, Dr. Kwon stresses that patient selection is still critical to ensure that the device can reach its full potential. “There are some limitations to the technology due to the fact that this is an ultrasound device,” says Dr. Kwon.
“The energy is transferred through ultrasound, and ultrasound cannot penetrate through gas or bone. So, anything that is covered by the ribs cannot be accessed with this machine. About 70-80% of the liver lies behind the ribs, but we can still access the area below the costal margin. All the lesions that we treat with histotripsy must be within that region.”
https://consultqd.clevelandclinic.o...s-ultrasound-technology-to-treat-liver-tumors