Talk:Radiography

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Deletion or merge

I wonder what the response would be to a proposal to nominate this page for deletion (or merging with

Medical radiography exist independently at this stage. Beevil (talk) —Preceding undated comment added 13:52, 14 February 2017 (UTC)[reply
]

I agree. The components are the same regardless of being medical or industrial in nature. The split caused a lot of duplicate information. I performed the merge now from
Medical radiography which seems to be duplicate from that in Radiography. Nevertheless, I paste it here in case anyone wants to check if there is anything more to add to Radiography from it. Mikael Häggström (talk) 18:51, 15 April 2017 (UTC)[reply
]
Radiography of knee in modern x-ray machine at Sandnessjøen Hospital, Norway

Radiography started in 1895 with the discovery of

radiologists for a very long time. X-rays are also exploited by industrial radiographers in the field of nondestructive testing, where the newer technology of ultrasound
is also used.

Unclear relationship

I removed the following section from the article, because it is almost completely unreferenced and doesn't seem to be within its own scope: It is titled "theory of X-ray attenuation" but then goes on to describe

X-ray generator, as linked clearly from the "Sources" section. Mikael Häggström (talk) 19:10, 15 April 2017 (UTC)[reply
]

Theory of X-ray attenuation

X-ray photons used for medical purposes are formed by an event involving an electron, while gamma ray photons are formed from an interaction with the nucleus of an atom.

  • Radiation Detection and Measurement 3rd Edition,

Glenn F. Knoll : Chapter 1, Page 1: John Wiley & Sons; 3rd Edition (26 January 21615461651:

In general, medical radiography is done using X-rays formed in an X-ray tube. Nuclear medicine typically involves gamma rays.

The types of

visible light
. It is this relatively high energy which makes gamma rays useful in radiography but potentially hazardous to living organisms.

The radiation is produced by X-ray tubes, high energy X-ray equipment or natural

alpha radiation emitters which are expensive; iridium-192 and cobalt-60 are far better photon sources. For further details see commonly used gamma-emitting isotopes
.

Gamma rays are indirectly ionizing radiation. A gamma ray passes through matter until it undergoes an interaction with an atomic particle, usually an electron. During this interaction, energy is transferred from the gamma ray to the electron, which is a directly ionizing particle. As a result of this energy transfer, the electron is liberated from the atom and proceeds to ionize matter by colliding with other electrons along its path. Other times, the passing gamma ray interferes with the orbit of the electron, and slows it, releasing energy but not becoming dislodged. The atom is not ionised, and the gamma ray continues on, although at a lower energy. This energy released is usually heat or another, weaker photon, and causes biological harm as a radiation burn. The chain reaction caused by the initial dose of radiation can continue after exposure, much like a sunburn continues to damage skin even after one is out of direct sunlight.

For the range of energies commonly used in radiography, the interaction between gamma rays and electrons occurs in two ways. One effect takes place where all the gamma ray's energy is transmitted to an entire atom. The gamma ray no longer exists and an electron emerges from the atom with

Compton effect
.

In both of these effects the emergent electrons lose their kinetic energy by ionizing surrounding atoms. The density of ions so generated is a measure of the energy delivered to the material by the gamma rays.

The most common means of measuring the variations in a beam of radiation is by observing its effect on a photographic film. This effect is the same as that of light, and the more intense the radiation is, the more it darkens, or exposes, the film. Other methods are in use, such as the ionizing effect measured electronically, its ability to discharge an electrostatically charged plate or to cause certain chemicals to fluoresce as in fluoroscopy.

Thanks for your edits to the article,
talk) 04:34, 17 April 2017 (UTC)[reply
]

Wiki Education assignment: Technical and Scientific Communication

This article was the subject of a Wiki Education Foundation-supported course assignment, between 22 August 2022 and 9 December 2022. Further details are available on the course page. Student editor(s): Sthomason27 (article contribs).

— Assignment last updated by Sthomason27 (talk) 01:51, 4 October 2022 (UTC)[reply]