A propensity score-matched analysis of stereotactic radiotherapy for metastatic brain tumors using the Leksell Gamma Knife Icon Mask system: a single-center retrospective comparative study of cases meeting and not meeting the JLGK0901 Criteria. - Oi Y; Kawabe T; Ogawa T; Taniyama I; Yamanaka T; Takahashi Y; Sato M; Hashimoto N (Journal of neurosurgery, 2025)