Simulation software 4D MR-RT

contouringtreatment planningmedical

Overview
Philips 4D MR-RT is a 4D MR simulation application designed for MR-based radiation treatment planning of moving abdominal anatomies. Acquisitions are performed during free breathing with a self-gating respiratory signal that separates inhale and exhale and applies advanced binning to account for breathing hysteresis. The application supports multi-contrast T1 and T2 imaging, with or without fat suppression, and reconstructs up to 10 respiratory phases. Processed outputs include separate respiratory phases, Mid-Ventilation and Mid-Position images to support contouring and planning workflows.

Key features

• Self-navigated free-breathing acquisition
• Multi-contrast imaging: T1, T1 SPAIR, T1 mDIXON, T2, T2 SPAIR
• Differentiates inhalation and exhalation, accounting for breathing hysteresis
• Reconstruction of up to 10 respiratory phases
• Provides a complete respiratory trace for the patient
• Processed outputs: separate respiratory phases, Mid-Ventilation, Mid-Position
• Supports contouring workflows for various linear accelerator (Linac) strategies
• Uses SmartSpeed FreeBreathing acceleration with predefined protocols
• All contrast scans can be completed in under 6:40 minutes with required protocols

Main application

• Abdomen (MR simulation for radiotherapy)

Notes
Up to 10 respiratory phases can be reconstructed. Advanced binning accounts for breathing hysteresis to better separate inhale and exhale phases. Calculated images and processed outputs (Mid-Position, Mid-Ventilation, or separate phases) are provided to support radiation treatment planning workflows.

Technical specifications

• Main applications: Abdomen
• Respiratory trace: provides a respiratory trace covering the complete respiratory pattern
• Contrasts: T1, T1 SPAIR, T1 mDIXON, T2, T2 SPAIR
• Calculated images: Mid-Position, Mid-Ventilation
• Speed: requires SmartSpeed FreeBreathing predefined protocols; all contrast scans < 6:40 minutes
• Field strength: 1.5T and 3.0T