RTsafe is a medical technology company that has developed a unique approach to quality assurance that significantly enhances the safety & accuracy of radiotherapy for cancer. It combines proven expertise in medical physics with highly accurate 3D printing technology to create pseudo‐in‐vivo dosimetry phantoms. The anatomically accurate effigies enable medical professionals to plan more precise treatment interventions for each individual patient and help radiotherapy technology innovators to fine‐tune their products. The result is more effective individualized therapy and reduced patient risk.