The Swedish Nanox - Luxbright

Luxbright is a publicly-traded stock in Sweden that claims to have developed a ZnO "whiskers" cold-cathode x-ray tube.

Luxbright tubes (made in China)

If these tubes look like the ones Nanox shows on its website, it is probably because they are the same cheap low-power (hot-cathode?) Chinese tubes.

Nanox tubes (made in China?)

Luxbright claims in its financial reports to have a customer, MARS, that is in clinical trials for a spectral CT.  It also claims in a press release to have shipped some regular tubes to a United States (non-medical) customer. 

It all sounded plausible, until I saw what they put in their press release (translated by google):

The company believes that the cold cathode is the X-ray equivalent of the LED lamp, both in terms of its technical performance and the market's potential. An important technical advantage of the reduced heat generation is that it enables simpler cooling devices than those used for conventional [tubes.] Therefore, X-ray systems can be made smaller and more portable, which can create new opportunities for the X-ray industry.

Those two bold[ed] phrases are unmistakable telltales (indications) of a scam.  Why?  Because a cold cathode does not improve technical performance or market potential of a tube, just the opposite, and does not result in reduced heat generation (as 99% of the heat is actually generated at the anode). 

So, if you are waiting for that full-color MARS CT, even if it were invented by CERN, don't hold your breath.

Thanks to Risky business @yahoo for bringing it to my attention.

Update October 6, 2021:  Somehow MARS put together a device and placed it at Lausanne University Hospital (CHUV) in Switzerland for "a trial."  Not clear whether it is using a fancy Luxbright tube, or a regular cheap dental tube.