This is kind of a nitpick but it actually wasn't even radiography, it wasn't for imaging, it was for radiation therapy - blasting cancer with radiation to kill it. So it was even more dangerous than it might sound :( definitely something that should not have safety controlled by software.
There was also a horrible disaster with someone taking the radioactive material from a machine like that in an abandoned hospital and messing around with it at home. People died in both incidents.
[0] https://en.wikipedia.org/wiki/Therac-25