Finnish to English Other General / Conversation / Greetings / Letters

So far, all examples I've found of the phrase "native x-ray" seem to be from people whose first language is Finnish, or some other language besides English.

It therefore seems fair to conclude that "native x-ray" is not the best translation of "natiiviröntgen".

What would be a better translation?

(I've also seen "traditional x-ray" for "natiiviröntgen", but I wonder if there's a better option than that as well.)

Thanks