Cone-Beam Computed Tomography-Guided Adaptive Radiotherapy: A Case Report on Dynamic Tumor Response in Lung Adenocarcinoma.

Cone-beam computed tomography (CBCT) is an essential tool in radiotherapy, enhancing patient positioning accuracy and enabling precise treatment delivery by monitoring anatomical changes throughout the treatment process. This case report highlights the significant role of CBCT in managing a patient with lung adenocarcinoma treated with concurrent chemoradiation. The lung mass and lower paratracheal lymph nodes were irradiated with 60 Gy in 30 fractions. During the course of treatment, CBCT allowed us to observe substantial tumor shrinkage, prompting a treatment replanning to ensure optimal targeting of the tumor while minimizing radiation exposure to healthy tissues. This adaptive approach resulted in excellent treatment outcomes with no complications, demonstrating the efficacy of CBCT in modern radiotherapy.