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Measurement of the power, energy, irradiance, or radiant exposure of high-energy, ionizing radiation. Also known as radiation dosimetry.



an area of applied physics that studies the physical values that characterize the effect of ionizing radiation on natural objects (animate and inanimate)—in particular, radiation doses—and the methods and instruments for measuring these amounts.

The development of dosimetry was spurred initially by the need to protect man against ionizing radiation; biological effects that appeared after the irradiation of man were noted soon after the discovery of X rays. The need arose for a quantitative evaluation of the degree of radiation danger. The basic quantitative criterion was taken to be the exposure dose, measured in roentgens and determinable in terms of the amount of atmospheric ionization. The work of Soviet scientists P. N. Lukirskii, V. M. Dukel’skii, D. N. Nasledov, K. K. Aglintsev, and I. V. Poroikov was important in the development of roentgenometry.

With the discovery of radium it was learned that the beta and gamma radiations of radioactive substances bring about biological effects similar to those caused by X-radiation. A danger arose in the isolation, treatment, and use of radioactive compounds in that radioactive substances could get inside the body. Methods were developed for measuring the activity of radioactive sources (the number of decays per second). These methods are the basis of radiometry.

The development and construction of nuclear reactors and charged particle accelerators, the development of nuclear power, and the mass production of radioactive isotopes have led to a great diversity of types of ionizing radiation and to the development of diverse dosimetric instruments (dosimeters).

Research on the biological effects of ionizing radiation on the cellular and molecular levels has brought about the development of microdosimetry, which examines the transfer of radiation energy to the microstructures of matter.


References in periodicals archive ?
Photon beam dosimetry in the superficial buildup region using radiochromic EBT film stack.
Gel dosimetry started with the use of gels containing Folin's phenol, in which color changes were observed when exposed to radiations.
Numerous studies have attempted to explain the effect of gamma radiation on the optical and electrical properties of both manganese phthalcyanine polymer (MnPC) thick films and polystyrene doped by methylene blue were examined for dosimetry applications [17, 18].
There are two additional calculated vocal dose measures that are provided by the APM dosimetry software that are of potential interest in evaluating the overall vocal load: the cycle dose and the distance dose, and their derivation has been described fully elsewhere.
1 Industrial users and National Measurement Institute (NMI) transfer dosimetry services rely on these two manufacturers for their alanine dosimeters.
210[degrees]C glow peak is about 4 times more intense compared to the dosimetry peak of the well known TLD phosphor LiF-TLD 100.
In the ongoing dose confirmation and dosimetry study, patients received a single treatment of Cotara and were evaluated for specificity of drug localisation to the tumour, as well as for progression-free survival and overall patient survival.
5 October 2009 - Swedish nuclear industry services provider Studsvik AB (STO: SVIK) said today it sold its personal dosimetry operations to US firm Landauer Inc (NYSE: LDR), booking a SEK6.
This book will appeal primarily to graduate and professional students in medical physics, radiation oncology residency programs and professional medical dosimetry programs.
There are 2 major limitations associated with using commercially available treatment planning software for medical dosimetry education.
The sale of the dosimetry line, whose products range from personal electronic dose meters to modular teledosimetry systems for monitoring networks, by Siemens marks the end of Siemens Environmental Systems (SES) business.