X-ray

X-rays were a type of electromagnetic radiation. They were used in medical examinations because they penetrated soft tissue allowing a non-invasive exam of the internal anatomy; they could also be used to examine the interiors of sealed objects using the same method. High levels of X-ray radiation could be harmful to many forms of life. When focused into a coherent beam or laser, X-rays could be used as an offensive weapon.

Instances of medical X-ray use

 * In the 1970s, X-rays were used on the Doctor at Ashbridge Cottage Hospital, revealing his binary vascular system and astounding Dr. Henderson. (DW: Spearhead from Space)


 * In 1999, Dr. Grace Holloway was similarly astounded at the Doctor's X-ray results. (DW: Doctor Who)

Instances of X-rays as non-medical imaging

 * The Mantis leader, in his attempts to learn the nature of the Doctor's TARDIS, had it subjected to X-rays, discovering it was dimensionally transcendental and that the Doctor was inside it. (TVC: Size Control)

Instances of harmful X-ray use

 * The Doctor cured Liz Shaw and Captain Harvey of their possession by a sentient virus by using an X-ray machine on them. (DWA: Invaders Invisible)


 * In 2003, the Doctor used a singularity which generated X-ray pulses to sterilize Agent Yellow, saving humanity at the cost of killing millions. (NA: Eternity Weeps)


 * In 2007, the Doctor destroyed one of Florence Finnegan's Slabs by using his sonic screwdriver to increase the radiation of Royal Hope Hospital's X-ray machine by 5000%. (DW: Smith and Jones)

X-ray-based weapons

 * In the 21st century, Space Station W3 was armed with an X-ray laser. (DW: The Wheel in Space)


 * On the Moon's surface in 2070, the Cybermen employed a cannon-sized X-ray laser. (DW: The Moonbase)


 * The Cyber-gun found on Telos by the Parry expedition was a hand-held X-ray laser. (DW: The Tomb of the Cybermen)