What I'm envisioning, as stated, in part before, is a wand, perhaps 20-25 cm long with probes spaced at perhaps 50 mm spacing along its length, and rotating full-circle about the amputated extremity, with a computer controlling the penetration, possibly open-loop, and monitoring the corresponding pressure.

One concern I have is that the deflection might be considerable and therefore not so easy to measure with strain-gauge or other piezoelectric means. This may not be an issue however. I'd expect that there be about 100, give or take, sensors involved.

This sort of thing has been attempted with optical means, but that lacks information about the distinction between soft and hard areas, which is quite important.

The importance of the tissue hardness can't be overemphasized, as prosthetic limbs are supported by the hard-contact areas, but have to accommodate the soft tissue, despite the fact it can swell or shrink considerably with movement. Registration relies entirely on the hard areas, though.

RE