AI-guided Prognostication and Cranial Radiotherapy Optimization in EGFR-TKI-treated Non-small Cell Lung Cancer Patients With Baseline Brain Metastases

Inclusion Criteria:

* Pathologically confirmed non-small cell lung cancer;
* clinical stage IV (AJCC, 8th edition, 2017);
* EGFR sensitive mutations: EGFR L858R, EGFR exon 19 deletion;
* age≥18 years old;
* KPS score≥70;
* brain metastases at diagnosis;
* complete systemic imaging (including brain MRI) before third-generation EGFR-TKI treatment;
* received standard third-generation EGFR-TKI therapy (monotherapy or combined with brain radiotherapy);
* willing to cooperate with the follow-up after third-generation EGFR-TKI treatment;
* informed consent of the patient.

Exclusion Criteria:

* Multiple primary or metastatic tumors (except early skin cancer, cervical carcinoma in situ that has been treated radically, with no recurrence or progression for more than 5 years);
* Pregnant or lactating women who, as judged by the investigator, were not candidates for brain MRI;
* EGFR sensitive mutations were negative or EGFR mutation status was not detected.
* Uncontrolled epilepsy, central nervous system disease, or history of mental disorders, judged by the researcher to potentially interfere with the signing of the informed consent form or affect patient compliance.