Radiation effects and risks: overview and a new risk perception index.

Area of Science:

• Medical Imaging and Radiation Protection
• Risk Assessment and Communication

Background:

• Computed tomography (CT) scans involve low-level radiation exposure, creating uncertainty in risk perception.
• National and international organizations agree on cancer risk probability but not on risk perception.
• Risk perception, a subjective judgment of risk characteristics and severity, is poorly addressed by current risk management frameworks.

Purpose of the Study:

• To address the gap in understanding and managing risk perception related to radiation exposure from CT scans.
• To introduce a quantifiable index for assessing radiation risk perception.
• To foster a more rational approach to public understanding of radiation risks.

Main Methods:

• Defining risk perception based on subjective judgment of risk characteristics.
• Identifying severity and latency as key factors influencing risk perception.
• Postulating a novel risk perception index: severity divided by latency.

Main Results:

• The proposed risk perception index (severity/latency) offers a quantifiable measure.
• This index aims to mitigate the amplification of risk due to purely subjective judgments.
• Connecting objective risk factors (severity, latency) to subjective perception is explored.

Conclusions:

• A defined risk perception index can enhance the rationality of understanding radiation risks.
• Addressing risk perception is crucial for effective communication of CT scan radiation risks.
• The proposed index provides a framework for more objective risk perception assessment.