The jury seems to still be out on LED's for cavitations. One effect LED's have is their ability to stimulate blood circulation to an area of the body. The implications of this for "cavs" could be highly significant.
Lumen Photon Therapy™ and Carolina Cavitation Diagnostics™ are doing research on the applications of LED for "cavs" even as we speak. They say that LED's are showing significant promise for clearing cavitations non-invasively.