LIVE: Security scanners at airports: are they safe?

Diskussion i 'Flygplatser' startad av Ubbe, 7 Mars 2013.

  1. För den som är intresserad så sänds det en live stream kl 16:00- 17:30 7 mars som rör ovanstående ämne via länken ECR 2013 - Live En registrering krävs men den var inga problem.

    3 olika presentationer ingår.
    X-ray backscatter security scanners: principles, performance and potential health risks
    J. Damilakis; Iraklion/GR

    The operation of x-ray backscatter security scanners is based on backscattering of photons. The equipment consists of two x-ray tubes, collimators and detectors on both sides of the exposed passenger. Radiation detectors detect photons scattered back from the body and the scanner builds up front and back images of the individual. Studies show that the effective dose to an adult passenger from scanners used in aviation security screening is lower than 0.25 μSv per screening, which is the dose limit defined by the American National Standards Institute. However, children receive higher doses per screening than adults. This is a point of concern since children are more vulnerable to radiation than adults. Superficial organs receive higher doses than deeper organs. Pregnant passengers may also be exposed to radiation from security scanners. A screening that delivers 0.25 μSv effective dose to the mother would deliver approximately 0.12 μGy to the uterus. Little information exists on the detection performance of x-ray backscatter systems. A study (Kaufman and Carlson, J Transp Secur, 4:73-94, 2011) shows that contraband can remain undetected by x-ray backscatter security scanners under certain conditions. In conclusion, doses and associated radiogenic risks from exposing individuals to radiation for backscatter x-ray screening are negligible. The possible effects on public health, however, from very low-level exposure to ionizing radiation remain unknown. For this reason, non-ionizing technology should be considered before x-ray scanners become a primary screening tool in aviation security.
    Cumulative low-level x-ray radiation exposure: is it harmful?
    P. Vock; Berne/CH

    While acute exposures of around 100 mGy and more of individuals and populations to ionising radiation have been studied quite well over the last 60 years, the evidence base of the impact of lower level and cumulative exposure is much weaker. This type of exposure tends to have similarities to the continuous natural exposure to cosmic radiation and - in certain geographical locations - to terrestrial radiation. The limits of the linear-no threshold (LNT) model of stochastic radiation effects and reasons for a different biological impact at low levels will be discussed; potential consequences to the individual person and to the population are important but can only be estimated. The age at exposure and the sex are key factors determining the impact, with a generally higher sensitivity of young and female individuals. Currently, in medicine repeated low-level exposures tend to increase due to follow-up imaging for disease and to new screening procedures; consequences of this development will be evaluated.
    Security scanners using non-ionising radiation: current status and trends for development
    M. Kemp; Cambridge/UK

    Security scanners are used in aviation security and in other applications to detect metallic and non-metal explosives, weapons and other contraband concealed on the body. Whilst some types of scanner use low-dose X-rays, others avoid the use of ionising radiation by employing radio waves at millimetre wavelengths (1 cm - 0.5 mm; 30 - 600 GHz), which penetrate clothing and have short enough wavelengths to resolve small concealed objects. The talk will describe properties of materials and contrast mechanisms, principles of operation of both active and passive imagers at millimetre-wave, submillimetre-wave and terahertz frequencies. Benefits, limitations, technology trends and a range of current and potential applications including aviation security, loss-prevention and stand-off detection will be discussed. Non-ionising radiation standards, ethical and privacy issues will also be discussed, together with the techniques and concepts-of-operation which are used to mitigate privacy concerns.

    Enjoy Ubbe
  2. agehall

    agehall Medlem

    Sverige Sverige
    Ser väldigt intressant ut, men tyvärr har jag inte möjlighet att själv titta. Kommer det gå att se dessa i efterhand någonstans?
  3. Jag vet inte om de ligger kvar eller om de läggs ut på youtube sen? Återkommer när jag vet mer.
    1 person likes this.
  4. Tyvärr så verkar det som om de inte är tillgängliga i efterskott. Såg dem inte själv eftersom jag satt av ett möte som drog ut på tiden.

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