ScandiDos, a global leader in radiotherapy quality assurance, is proud to introduce Delta4 SRS Pro. This next-generation patient QA system enables high-precision 3D measurements at the isocenter for complex SRS and SBRT treatments.
At this year’s ESTRO congress in Stockholm, ScandiDos is showcasing its latest innovation, Delta4 SRS Pro. The system is purpose-built to meet the extreme demands of stereotactic radiotherapy (SRS and SBRT), where accuracy is paramount.
Precision Without Compromise
Stereotactic treatments are characterized by small target volumes, steep dose gradients, and non-coplanar beam geometries. These complexities require verification methods that can accurately mirror how the treatment is delivered to the patient. Currently, clinics are often forced to make compromises when performing quality assurance for stereotactic procedures, as existing systems fail to fully account for complex delivery angles and the extreme precision required.
Delta4 SRS Pro addresses these challenges by enabling true 3D measurement at the isocenter. The system utilizes an innovative detector geometry featuring three orthogonal planes and a total of 2916 isotropic diodes, specifically designed to minimize directional dependence and ensure unparalleled accuracy.
"With Delta4 SRS Pro, we aim to eliminate the compromises often associated with stereotactic QA," says Anders Murman, acting CEO of ScandiDos. "The system measures the 3D dose where it matters most—at the isocenter—reflecting the full treatment geometry, including non-coplanar deliveries, without any simplifications. The patented detector technology enables volumetric stereotactic QA with unprecedented precision."
Advancing the Delta4 Family
Delta4 SRS Pro expands the existing ScandiDos product portfolio by offering enhanced spatial resolution and full support for non-coplanar beam geometries, including 90° couch rotations.
Visit Us at ESTRO 2026
Attendees of ESTRO 2026 in Stockholm are invited to visit ScandiDos at Booth C05:04 to experience the system firsthand and discuss the future of quality assurance with our experts.
For more information, please visit the product website.
Delta4 SRS Pro is currently being showcased as a demonstration system and is not yet available for commercial sale.