Texas Industrial Radiography Gamma Practice Test

What is the main purpose of a collimator?

1. To contain radioactive spills

2. To protect the drive cable

3. To prevent unauthorized entry into the High Radiation Area

4. To restrict the beam of radiation

The correct answer is: To restrict the beam of radiation

The primary function of a collimator is to restrict the beam of radiation to a specific shape or direction. By doing this, it helps to enhance the quality of the radiographic image and minimize the exposure to surrounding areas that are not being examined. This focused beam allows for accurate inspections while ensuring safety by reducing unnecessary radiation exposure to workers and others in the vicinity. The design of the collimator allows it to control the size and shape of the radiation field, ensuring that it aligns with the intended area of interest on the object being examined. This purpose is crucial in industrial radiography, where precision is necessary for detecting defects or flaws in materials while maintaining strict safety standards. As such, the collimator's capability to restrict the beam is essential to both the effectiveness of the radiographic process and the protection of individuals nearby.