How much time would it take to make this available for public?
That said, the clinical trial is for the combination of a drug treatment + implantable device. The implantable device itself (Sonocloud 9) has been granted fast track status by the FDA (https://www.fusfoundation.org/posts/cartheras-sonocloud-9-sy...). The fast track status should help speed up how quickly the FDA authorizes the overall treatment once clinical trials are complete.
So... completely pulling a number out of my butt, probably 5-7 years.
While we're all desperate (some more than others) for a break-through in cancer treatment, it seems perfectly reasonable to demonstrate that something is both safe and better than the current standard-of-care before physicians start rolling this out to everyone affected by the brain tumours this therapy would help.
I sympathize with the sentiment that delaying rolling out a therapy like this seems inhumane, it would be no less (and arguably more) inhumane to roll out a therapy where we didn't establish safe doses and effectiveness to the best of our ability. Both potentially result in deaths.
Sometimes I wonder if we are erring too much on the side of slowing things down.
But in saying that, if a trial is showing very positive results then it can be fast tracked, as it is unethical to withhold that kind of treatment. Conversely, plenty of trials that look good in phase I/II fail in phase III and are terminated early.