MeSH Browser

MeSH Heading: X-Rays
Tree Number(s): G01.358.500.505.970; G01.750.250.970; G01.750.750.918
Unique ID: D014965
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D014965
Annotation: diagnostic use of X-rays = RADIOGRAPHY + specific disease /‌diag image; therapeutic use of X-rays = X-RAY THERAPY (general) or /‌radiother with specific diseases; X-ray or x-ray in translations: follow text
Scope Note: Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.
Entry Term(s): Grenz Ray; Grenz Rays; Radiation, X; Roentgen Ray; Roentgen Rays; X Ray; X-Radiation; X-Ray; Xray; Xrays
Public MeSH Note: 91; was see under RADIATION, IONIZING 1976-90; was see under RADIATION 1965-75
Online Note: search RADIATION 1966-74
History Note: 91(75); was see under RADIATION, IONIZING 1976-90; was see under RADIATION 1965-75
Entry Combination: therapeutic use:X-Ray Therapy
Date Established: 1991/01/01
Date of Entry: 1999/01/01
Revision Date: 2020/05/27

Concept UI: M0023041
Scope Note: Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.
Terms: X-Rays Preferred Term
Term UI T043702
Date01/01/1999
LexicalTag NON
ThesaurusID NLM (1975); X-Ray
Term UI T000997723
Date11/19/2019
LexicalTag NON
ThesaurusID NLM (2021); X Ray
Term UI T000997722
Date11/19/2019
LexicalTag NON
ThesaurusID NLM (2021); Roentgen Rays
Term UI T043701
Date01/17/1975
LexicalTag EPO
ThesaurusID UNK (19XX); Radiation, X
Term UI T043703
Date06/30/1994
LexicalTag NON
ThesaurusID NLM (1995); X-Radiation
Term UI T043704
Date06/30/1994
LexicalTag NON
ThesaurusID NLM (1995); Xrays
Term UI T043705
Date12/07/1977
LexicalTag NON
ThesaurusID UNK (19XX); Roentgen Ray
Term UI T000997724
Date11/19/2019
LexicalTag NON
ThesaurusID NLM (2021); Xray
Term UI T000997725
Date11/19/2019
LexicalTag NON
ThesaurusID NLM (2021)

X-Rays MeSH Descriptor Data 2025