Where does “radiograph” come from?

I need to identify what a radiograph is and trace the etymology properly based on the given chain. Looking at the chain provided, I notice there's an issue: it shows "Latin radius" but then jumps to "Ancient Greek γράφω" (grapho, meaning "to write/carve"). The chain also has redundant PIE entries at the end (ger- appears twice, and there's conflicting roots gerebh- and ger-). However, a radiograph is actually a photograph made using X-rays (radio- + -graph). The chain seems incomplete or confused because it shows "Latin radius" but "radiograph" would more accurately derive from "radio-" (relating to radiation/rays) + "-graph" (from Greek graphein, to write/record). Given the chain as provided, I'll work with what's stated, but I should note the chain appears problematic. If I must use only

radiograph (English): An image, often a photographic negative, produced...