Radiation safety and protection
This presentation is the property of its rightful owner.
Sponsored Links
1 / 27

Radiation safety and protection PowerPoint PPT Presentation


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

Radiation safety and protection. Christos Aggelopoulos, DDS. Vilhelm Konrad Roentgen. December 22, 1895. Setting the tube…. Setting the tube…. Early medical radiology…. January 14, 1896, the first dental radiograph. Dr Edmund Kells. ALARA. A s L ow A s R easonably A chievable.

Download Presentation

Radiation safety and protection

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 safety and protection

Radiation safety and protection

Christos Aggelopoulos, DDS


Radiation safety and protection

Vilhelm Konrad Roentgen


Radiation safety and protection

December 22, 1895


Setting the tube

Setting the tube…


Setting the tube1

Setting the tube…


Early medical radiology

Early medical radiology…


January 14 1896 the first dental radiograph

January 14, 1896, the first dental radiograph


Dr edmund kells

Dr Edmund Kells


Radiation safety and protection

ALARA

As

Low

As

Reasonably

Achievable


Radiation protection measures

Radiation protection measures…

  • For the patient

  • For the oral health proffesional


Radiation safety and protection

FILTRATION

Removes unwanted, low energy X-rays

1.5 mm Al

For 50-69 KVp

2.5 mm Al

For 70 KVp and

above


Radiation safety and protection

COLLIMATION

Restricts the size and shape

of the X-ray beam


Radiation safety and protection

COLLIMATION

Field size from round cone is

3X that what is needed to

expose a #2 film

With RC the skin exposure

is reduced by about 60%

Compared to round collim.


Radiation safety and protection

COLLIMATION

Beam diameter no greater than 7 cm

at skin (Federal Regulation)


Radiation safety and protection

BEAM INDICATING DEVICES

Long (12”-16”), open-shielded, lead-lined

BIDs (cones) are recommended

Rectangular cones are recommended

over round cones


Radiation safety and protection

FILM HOLDING DEVICES

Accurate aiming

Eliminates patient holding film


Radiation safety and protection

FILM SPEED

E speed film reduces patient

exposure by 40%-50%


Radiation safety and protection

DIGITAL IMAGING

Further exposure

reduction

Image

enhancement


Radiation safety and protection

EXPOSURE CONTROL

Use electronic timers

only

Mechanical timers not

recommended


Radiation safety and protection

LEADED APRONS


Radiation safety and protection

DARKROOM PROCEDURES

Adequate safelighting

and free of light leaks

Time temperature

processing


Radiation safety and protection

FILM MOUNTING AND VIEWING

Use opaque mounts

Mask viewbox


Radiation safety and protection

TAKE X-RAYS ONLY WHEN NEEDED

  • X-rays every 6 mo is not the rule

  • Apply FDA selection criteria for radiographic examinations

  • Take into account the welfare of the patient

  • Avoid routine radiographs


Radiation protection measures for the operator

Radiation protection measures for the operator

Occupational exposure: 50 mSv/yr

Public exposure: 1-5 mSv/yr

Maximum permissible dose (MPD): The maximum dose

of radiation which will not be expected to cause any

significant radiation effects in a lifetime


Radiation protection measures for the operator1

Radiation protection measures for the operator

  • Stand at least 6 feet away from the patient and 90o-130o to the primary beam

  • Stand behind a barrier

  • Never stand in the primary beam

  • Never hold films in the patient’s mouth

  • Never hold or stabilize the X-ray tubehead during the exposure


Radiation protection measures for the operator2

Radiation protection measures for the operator

Quality assurance program:

Proper staff training

Monitoring of the X-ray machines

Darkroom protocol

Film badge service

Office design:

Primary and secondary barriers


Discussion

DISCUSSION

What to keep in mind…


  • Login