International Day of Medical Physics

International Day of Medical Physics is observed on November 7. It recognizes the work of medical physicists and the ways physics supports modern health care, from medical imaging to radiation-based treatments. The day is also an opportunity to help patients and communities understand the people and technology behind these services.

How the day started

The exact origin of International Day of Medical Physics is not well documented in the available information. The American Association of Physicists in Medicine notes that the theme for IDMP 2013 was “Radiation Exposure from Medical Procedures: Ask the Medical Physicist!” The theme offered an opportunity to promote the role of medical physicists in health care around the world.

Medical physicists work with health-care teams to apply principles of physics in clinical settings. Their responsibilities vary by workplace, but can include helping develop and check imaging and radiation-therapy procedures, assessing equipment performance, and supporting radiation safety. Their work often happens behind the scenes, while helping clinicians use complex technologies thoughtfully.

What medical physics means in health care

Medical physics connects scientific knowledge with practical patient care. In diagnostic imaging, such as X-rays, computed tomography (CT), and magnetic resonance imaging (MRI), medical physicists may help ensure that equipment and procedures are appropriate for their intended use. They can also contribute to quality assurance, which helps care teams check that equipment is working as expected.

In radiation therapy, medical physicists help care teams plan and deliver treatments using specialized equipment. They work alongside radiation oncologists, therapists, and other professionals, helping make sure treatment systems and plans are carefully checked. The International Organization for Medical Physics notes that medical physicists also contribute to radiation protection and the development of emerging technologies. Their specific roles and responsibilities can differ depending on the country, health-care system, and clinical setting.

The observance also highlights the importance of communication. Patients may have questions about imaging, radiation, or the equipment used in their care. Clear explanations from qualified health-care professionals can help people understand what a procedure involves and why it has been recommended. International Day of Medical Physics offers a timely prompt to recognize the teamwork that supports these conversations and clinical decisions.

Ways to observe International Day of Medical Physics

• Learn about the profession. Read an introduction to medical physics from a university, hospital, or professional organization, and explore how the field contributes to imaging, radiation therapy, and safety.
• Recognize the team. If you work in health care, share a note of appreciation with medical physicists and colleagues who support the safe use of clinical technology.
• Ask thoughtful questions. If you are preparing for a medical imaging or radiation-therapy appointment, write down questions about the procedure and discuss them with your care team. They can explain what applies to your individual situation.
• Share a reliable resource. Post an educational article or a simple explanation of medical physics from a trusted health-care or professional source. Keep the focus on helping others understand the field rather than offering medical advice.
• Explore science together. Families can talk about how physics helps people create images of the body or use technology in treatment. A library visit or age-appropriate science activity can make the subject approachable for curious children.

Reviewed by the Holiday List editorial team on November 4, 2026 · Last updated November 4, 2026.

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