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Efecto dosimétrico de la compresión abdominal en la planificación adaptativa en línea para cánceres abdominales

Moghadaseh Khaleghibizaki^1,2, Angela Sobremonte³, Luis Perles¹

¹Departments of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.

Physics and imaging in radiation oncology

|January 16, 2026

Abstract:

Compression belts (CBs) are sometimes used to reduce respiratory motion during stereotactic body radiotherapy of abdominal cancers with magnetic resonance (MR)-guided online adaptive planning. This study evaluated the dosimetric effects of overriding the relative electron density (ED) value of CBs in creating synthetic computed tomography (CT) scans for MR-guided adaptive planning. We evaluated plans for 12 patients with abdominal cancer and identified that ED values between 0.2 and 0.3 achieved the best approximation of CB ED in dose calculation. Our study presented an approach to estimate appropriate ED overrides for CBs in MR-guided online adaptive planning.

Palabras clave:

Compresión abdominal Anulación de densidad electrónica Radioterapia adaptativa guiada por RM TC sintética

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