The principle of ALARA (As Low As Reasonably Achievable) emphasizes reducing exposure by combining three methods: using shielding (e.g., lead aprons), reducing exposure time, and increasing distance from the source.
The Gray (Gy) is the SI unit for absorbed radiation dose. One Gray represents the absorption of one joule of radiation energy per kilogram of tissue. Sievert measures equivalent dose, considering the biological effect, while Roentgen measures exposure.
A lead apron acts as a shield against scattered radiation, protecting sensitive tissues and organs from unnecessary exposure during an X-ray procedure.
According to the Inverse Square Law, radiation intensity decreases as the square of the distance increases. For example, doubling the distance from the source reduces the intensity to one-fourth.
Amplification is not a radiation protection method. The three primary methods—shielding, time, and distance—are used to reduce radiation exposure effectively. Amplification has no role in safety practices related to radiation.
