Self-gated 4D MRI for respiratory motion management

Motion artifacts in 3D imaging often occur due to physiological movements such as respiration, cardiac activity, peristalsis, and muscle contractions. While rapid imaging techniques like single-slice CT may capture brief moments of the respiratory cycle, inconsistent phase sampling across slices frequently introduces motion distortions.
Siemens Healthineers addresses this with 4D MR-RT Self-Gating Technology, which dynamically tracks abdominal and thoracic organ motion throughout acquisition. This innovation eliminates external sensors while maintaining exceptional soft-tissue contrast and phase-consistent free-breathing sorting.
The technology enables full free-breathing radiotherapy simulation, eliminating breath-holds to enhance patient comfort. By suppressing motion artifacts and improving spatial accuracy, it achieves superior tumor targeting precision and facilitates accurate delineation of moving targets and organs at risk.

Our Hospital’s First Clinical Application of 4D MRI Gating Technology – July 4, 2025