1. Li G, Ballangrud A, Kuo LC, Kang H, Kirov A, Lovelock M, et al. Motion monitoring for cranial frameless stereotactic radiosurgery using video-based three-dimensional optical surface imaging. Med Phys. 2011;38(7):3981–94.
2. Carminucci A, Nie K, Weiner J, Hargreaves E, Danish SF. Assessment of motion error for frame-based and noninvasive mask-based fixation using the Leksell gamma knife icon radiosurgery system. J Neurosurg. 2018;129(Suppl 1):133–9.
3. Belcher AH, Liu X, Chmura S, Yenice K, Wiersma RD. Towards frameless maskless SRS through real-time 6DoF robotic motion compensation. Phys Med Biol. 2017;62(23):9054–66.
4. Babic S, Lee Y, Ruschin M, Lochray F, Lightstone A, Atenafu E, et al. To frame or not to frame? Cone-beam CT-based analysis of head immobilization devices specific to linac-based stereotactic radiosurgery and radiotherapy. J Appl Clin Med Phys. 2018;19(2):111–20.
5. Chung HT, Kim JH, Kim JW, Paek SH, Kim DG, Chun KJ, et al. Assessment of image co-registration accuracy for frameless gamma knife surgery. PLoS One. 2018;13(3):e0193809.