Which type of exposure limit is set at 5000 mRem?

The exposure limit set at 5000 mRem refers to the organ dose limit, which pertains specifically to the amount of radiation an individual organ can receive over a defined period, typically one year. This limit is established to protect sensitive organs from excessive radiation exposure that could lead to increased risks of radiation-induced damage and cancer.

Unlike whole body limits, which focus on the exposure level for the entire body, the organ dose limit is crucial because different organs and tissues have varying vulnerabilities to radiation. For instance, organs like the thyroid or bone marrow may have different threshold levels based on their sensitivity to radiation effects. Establishing a specific limit like 5000 mRem for organ doses helps ensure that these vital parts of the human body remain within safe exposure ranges during diagnostic and therapeutic procedures.

This understanding is important in radiation safety practices and regulatory compliance, allowing healthcare professionals to minimize risks while performing necessary medical imaging tasks.