requirements
Legislative requirements Until 1985, there were no legislative requirements specifically relating to the use of radiation in place within the UK. The use of radiation in medicine was relatively well…
descriptors
Chapter 2. Two other quantities are relevant when discussing radiation protection matters, these are equivalent dose and effective dose which have the units of Sieverts to indicate a change in…
Introduction
Chapter 17 of this book, and are summarized in the following section. As there are known risks of radiation exposure, levels of acceptable risk have been specified by international expert…
Radiation protection
Introduction Biological effects of radiation Stochastic hereditary effects Stochastic somatic effects Non-stochastic somatic effects Dose descriptors Equivalent dose Effective dose Background radiation Legislative requirements The Ionising Radiations Regulations 1999 [3] …
radiation detectors
Other radiation detectors The ionization chambers previously described may be used to detect and measure both photons and charged particles, provided that the radiation can penetrate the wall or entrance…
dose measurement systems
Figure 3.13. Related posts: descriptors imaging Radiotherapy beam production photon therapy trends Dentition
chamber corrections
Ionization chamber corrections Whenever instruments that are based upon collection of ions produced in air are used to determine absorbed dose, a number of factors in addition to the calibration…
with secondary standard instruments
12, 13] • high energy (megavoltage) x-ray beams [5, 14] • electron beams of energy from 4 to 25 MeV [15]. Related posts: requirements imaging Radiotherapy beam production photon therapy trends…
ionization chambers
Practical ionization chambers The Primary Standard instruments described above are complex, sophisticated and sensitive instruments that are unsuitable for routine use within a hospital environment where small, relatively robust, simple…
