Short answers, pulled from the story.
Engineer Godfrey Hounsfield from the British company EMI invented the X-ray computed tomography device for head diagnosis in 1972. This machine projected X-rays through a section of the human head and processed them by computer to reconstruct a cross-sectional image known as image reconstruction.
Magnetic resonance imaging has been in use since the early 1980s and does not involve ionizing radiation unlike CT scans. There are no known long-term effects of exposure to strong static fields but well-identified health risks exist regarding tissue heating from RF field exposure and implanted devices.
The global market for manufactured medical imaging devices was estimated at 5 billion dollars in 2018. Notable manufacturers included Fujifilm, GE HealthCare, Siemens Healthineers, Philips, Shimadzu, Canon, Carestream Health, Hologic, United Imaging, and Esaote.
Radiation exposure from medical imaging in 2006 accounted for about 50% of total ionizing radiation exposure in the United States. Medical imaging can lead to patient and healthcare provider harm through exposure to ionizing radiation, iodinated contrast, magnetic fields, and other hazards.
Germany protects X-ray images as well as MRI, medical ultrasound, PET and scintigraphy images under related rights or neighbouring rights that last 50 years after image creation if not published within 50 years. The Cyber Law in Sweden states that pictures can be protected as photographic works depending on originality levels while the UK General Medical Council does not require consent prior to making recordings of X-ray images.