ALARA CONCEPT

ALARA stands for As Low As Reasonable and Achievable. That means the radiation exposure which we are giving to the patient must be as low as minimum so that maximum information can be achieved and patient radiation dose is reduced. The basic principles of ALARA are minimizing time in radiation areas, maximizing the distance from a source of radiation, and using shielding whenever possible. Reducing the time of an exposure reduces the effective dose proportionally. Exposure time should be reduced during radiation exposure. Increasing distance reduces dose due to the inverse square law. The radio imaging technologist must stand at least 1 m from the radiation source. Double the distance, lesser will be the radiation dose. Shielding must be used by the radio imaging technologist during radiography. Use protective shields whenever required. There are many radiation protective devices which are to be used in the radiology department during procedure. Mostly used protection device is lead apron as it covers almost the whole body part including thorax region, abdomen, spine, pelvis and lower limb up to knee region. That’s why it is used. The radio imaging technologist must wear lead apron when performing the procedure. They must also wear TLD badge inside the lead apron. While performing the radiation procedure, they must keep ALARA concept in their mind in order to reduce the radiation dose and effects of radiation.

By -ASSISTANT PROFESSOR – Mr. Binoo
Department -RADIOLOGY
UCBMSH Magazine – (YouthRainBow)
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