RecruitingPhase 2Radiation therapySingle-Arm Comprehensive Ablative Bridging Irradiation I Prior to CD19 CAR-T In High-Risk R/R LBCLThis is a phase 2, single-arm, open-label study to evaluate the safety and efficacy of comprehensive bridging radiation therapy prior to CD19 CAR T-cell therapy for large B-cell lymphoma patients with bulky disease, defined as any lesion ≥5 cm.