45
Participants
Start Date
October 15, 2025
Primary Completion Date
September 1, 2028
Study Completion Date
September 1, 2030
Cohort A: Extensive Stage Small Cell Lung Cancer (ES-SCLC) Thoracic Tumor PULSAR (Personalized ultrahypofractionated stereotactic ablative radiotherapy)
Radiographic response-adapted thoracic tumor radiotherapy given as single doses ('pulses') before standard of care chemoimmunotherapy cycles. Adaptive Changes Allowed: Tumor target (size/shape), # of doses (reduction) Adaptive Changes Allowed: Tumor target (size/shape), # of doses (reduction)
Cohort B: Brain metastasis PULSAR (Personalized ultrahypofractionated stereotactic ablative radiotherapy)
"Intervention: Fractionated stereotactic radiosurgery (SRS, 5 doses total) for brain metastasis given in two pulses (3 fractions + 2 fractions) with second pulse adapted to interim radiographic response Adaptive Changes Allowed: Omission of 2nd pulse in \>=25% responders or tumor target size/shape change in remainder"
University of Texas Southwestern Medical Center
OTHER