Radiation detection monitoring devices and their use l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 28

RADIATION DETECTION MONITORING DEVICES AND THEIR USE PowerPoint PPT Presentation


  • 1009 Views
  • Uploaded on
  • Presentation posted in: General

RADIATION DETECTION MONITORING DEVICES AND THEIR USE. Module V. Instruments for d etecting and m easuring r adiation. Survey meters Geiger-Mueller (GM) instruments Ionization chamber instruments Scintilation instruments Laboratory counters Personnel dosimeters

Download Presentation

RADIATION DETECTION MONITORING DEVICES AND THEIR USE

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Radiation detection monitoring devices and their use l.jpg

RADIATION DETECTION MONITORING DEVICES AND THEIR USE

Module V


Instruments for d etecting and m easuring r adiation l.jpg

Instruments for detecting and measuring radiation

  • Survey meters

    • Geiger-Mueller (GM) instruments

    • Ionization chamber instruments

    • Scintilation instruments

  • Laboratory counters

  • Personnel dosimeters

    • Photographic film dosimeters

    • Thermoluminescent dosimeters

    • Pocket dosimeters

Module Medical V


Primary u se of r adiation i nstrument l.jpg

Level of radioactive contamination

Radiation dose rate in area

Identity and quantity of radioactive material

Accumulated dose to individuals inarea

Primary use of radiation instrument

Survey meters

Laboratory counters

Personnel dosimeters

Module Medical V


Gas filled detector s l.jpg

Gas filled detectors

Module Medical V


Geiger mueller gm i nstruments l.jpg

Geiger-Mueller (GM) instruments

Close-up view of probe Top: shield open

Bottom: shield closed

Module Medical V


Determination of contamination level l.jpg

Determination of contamination level

G-M survey meter with pancake probe

Module Medical V


Reading scale of gm detector l.jpg

Reading scale of GM detector

Module Medical V


How should you monitor l.jpg

How should you monitor?

Module Medical V


Surveying p atient u sing gm c ounter l.jpg

Surveying patient using GM counter

Module Medical V


Limitations of gm c ounters l.jpg

Limitations of GM counters

  • will not detect very low energy betas such as those from tritium

  • may miss alpha contamination if any type of shielding is present, such as gauze, thin layer of blood or more than 5 cm of air

Module Medical V


Alpha monitoring l.jpg

Alpha monitoring

alpha monitor

Module Medical V


Measurement of r adioactivity w ell c ounter l.jpg

Measurement of radioactivity:well counter

Module Medical V


Radionuclide d ose c alibrator l.jpg

Radionuclide dose calibrator

Module Medical V


Airborne a ctivity s amplers l.jpg

Airborne activity samplers

Module Medical V


Ionization c hamber s urvey m eters l.jpg

Ionization chamber survey meters

Module Medical V


Scintilation d etectors l.jpg

Scintilation detectors

Module Medical V


Scintilation survey m eters l.jpg

Scintilation survey meters

Module Medical V


Determination of type and a ctivity of radioactive material l.jpg

Determination of type and activity of radioactive material

Module Medical V


Crystal s cintillation g amma s pectroscopy l.jpg

Crystal scintillation gamma spectroscopy

Module Medical V


Liquid s cintillation c ounting l.jpg

Liquid scintillation counting

Module Medical V


Slide21 l.jpg

In-vivo measurementswhole body counters

Module Medical V


Slide22 l.jpg

Thyroid uptake detection

Module Medical V


Personnel d osimeters l.jpg

Personnel dosimeters

Electronic dosimeter

Film

badge

TLD

Module Medical V


Photographic f ilm d osimeters l.jpg

Advantages

Permanent record

Energy and nature of exposure

Cost

Disadvantages

Energy dependence

Fading

Size

Photographic film dosimeters

Module Medical V


Thermoluminescent d osimeters l.jpg

Thermoluminescent dosimeters

Module Medical V


Pocket d osimeters l.jpg

Pocket dosimeters

Module Medical V


Digital p ocket d osimeter l.jpg

Digital pocket dosimeter

Module Medical V


Review points l.jpg

Review points

  • Determination of contamination level often most important measurement in medical emergency setting Usually done with GM probe called pancake detector

  • Identification of radioactive materialtypically done by relatively sophisticated lab equipment (gamma- or alpha-spectrometer) Samples collected from patient or clothing often used for analysis

  • Instruments to measure accumulated dosecommonly referred to as dosimeters, worn by person to measure accumulated individual dose. Two types normally used: direct read-out devices (pocket dosimeters) and indirect TLDs & film badges


  • Login