Artificial Intelligence and the Future of Medical Physics

Artificial Intelligence (AI) is rapidly transforming healthcare. In fields such as radiology, oncology, and medical imaging, machine learning algorithms are already assisting physicians in diagnosis, treatment planning, and data analysis. Medical physics, particularly in radiotherapy, is no exception.

As treatment systems become more automated and data-driven, AI will increasingly participate in tasks traditionally performed by medical physicists. This raises an important question: how will the role of medical physicists evolve in an AI-driven healthcare system?

AI in Radiotherapy

Radiotherapy is a field that generates enormous amounts of data. Treatment planning systems analyze patient anatomy, radiation dose distributions, and machine parameters to design optimal treatment plans.

Artificial intelligence can assist in several areas:

Automatic contouring of tumors and organs at risk

Treatment plan optimization

Prediction of treatment outcomes

Detection of anomalies in machine performance

Automation of quality assurance workflows

These capabilities can significantly reduce the time required for treatment planning and verification.

However, automation also introduces new risks if systems are not properly validated.

Automation Does Not Eliminate Responsibility

While AI may automate some routine tasks, it does not eliminate the need for expert oversight. In fact, it may increase the importance of independent verification and measurement science.

Medical physicists are responsible for ensuring that:

Radiation machines deliver the correct dose

Measurement devices are properly calibrated

Quality assurance systems detect potential errors

Treatment plans are physically and clinically valid

AI systems rely heavily on training data and statistical models. If these models are trained with biased or incomplete datasets, they may produce incorrect predictions without obvious warning signs.

This makes verification through physical measurements more important than ever.

The Growing Importance of Measurement and Calibration

As clinical systems become more complex and automated, the role of the medical physicist may shift toward metrology and system validation.

Key areas where physicists will remain essential include:

Detector calibration and dose measurement

Validation of AI-generated treatment plans

Independent quality assurance systems

Statistical monitoring of machine performance

Development of new verification methodologies

Even if AI assists in decision-making, the physical delivery of radiation must always be confirmed through reliable measurement systems.

Radiation therapy ultimately depends on the accurate delivery of energy in the human body. This cannot be verified purely through software.

From Operators to System Guardians

Historically, many tasks in medical physics involved manual processes such as plan checking, measurement setup, and routine QA.

In the future, physicists may evolve into system-level experts responsible for overseeing complex networks of automated technologies.

Their responsibilities may include:

Auditing AI systems

Validating treatment algorithms

Designing QA protocols for automated workflows

Ensuring regulatory compliance

Maintaining measurement standards

In this sense, the role of the medical physicist may become more strategic and interdisciplinary.

Automation changes how work is performed, but it does not remove the need for scientific oversight.

AI as a Tool, Not a Replacement

Artificial intelligence should be viewed as a powerful tool rather than a replacement for human expertise. When used responsibly, AI can improve efficiency, reduce human error, and help clinicians process complex datasets more effectively.

However, patient safety must remain the highest priority.

Medical physicists will continue to play a crucial role in ensuring that new technologies — including AI — operate within safe, validated, and measurable limits.

As radiotherapy continues to evolve, the combination of advanced algorithms and rigorous physical measurement will define the next generation of cancer treatment technologies.

Author: Rosa Petit

Field: Medical Physics – Radiotherapy and Quality Assurance