Radiology Practice Test 2026 - Free Radiology Practice Questions and Study Guide

Screening patients for allergies prior to administering contrast agents is essential primarily to prevent allergic reactions. Many contrast agents used in imaging studies, especially iodinated contrast in CT scans, can provoke adverse reactions in individuals who are allergic or hypersensitive to these substances. Allergic reactions can range from mild symptoms, such as hives or itching, to severe anaphylactic reactions, which can be life-threatening. By identifying potential allergies beforehand, healthcare providers can take necessary precautions, such as selecting alternative imaging methods or ensuring immediate access to emergency treatment, thereby safeguarding the patient’s health during the imaging procedure.

While managing the patient's anxiety, preventing equipment malfunction, and ensuring the effectiveness of the procedure are important considerations in the overall care process, they do not directly address the critical safety concern linked to allergic reactions.