BACKGROUND AND PURPOSE: A comparison of patient positioning and intra-fraction motion using invasive frame-based radiosurgery with a frameless X-ray image-guided system utilizing a thermoplastic mask for immobilization. MATERIALS AND METHODS: Overall system accuracy was determined using 57 hidden-target tests. Positioning agreement between invasive frame-based setup and image-guided (IG) setup, and intra-fraction displacement, was evaluated for 102 frame-based SRS treatments. Pre and post-treatment imaging was also acquired for 7 patients (110 treatments) immobilized with an aquaplast mask receiving fractionated IG treatment. RESULTS: The hidden-target tests demonstrated a mean error magnitude of 0.7mm (SD=0.3mm). For SRS treatments, mean deviation between frame-based and image-guided initial positioning was 1.0mm (SD=0.5mm). Fusion failures were observed among 3 patients resulting in aberrant predicted shifts. The image-guidance system detected frame slippage in one case. The mean intra-fraction shift magnitude observed for the BRW frame was 0.4mm (SD=0.3mm) compared to 0.7mm (SD=0.5mm) for the fractionated patients with the mask system. CONCLUSIONS: The overall system accuracy is similar to that reported for invasive frame-based SRS. The intra-fraction motion was larger with mask-immobilization, but remains within a range appropriate for stereotactic treatment. These results support clinical implementation of frameless radiosurgery using the Novalis Body Exac-Trac system. Copyright 2010 Elsevier Ireland Ltd. All rights reserved.
BACKGROUND AND PURPOSE: A comparison of patient positioning and intra-fraction motion using invasive frame-based radiosurgery with a frameless X-ray image-guided system utilizing a thermoplastic mask for immobilization. MATERIALS AND METHODS: Overall system accuracy was determined using 57 hidden-target tests. Positioning agreement between invasive frame-based setup and image-guided (IG) setup, and intra-fraction displacement, was evaluated for 102 frame-based SRS treatments. Pre and post-treatment imaging was also acquired for 7 patients (110 treatments) immobilized with an aquaplast mask receiving fractionated IG treatment. RESULTS: The hidden-target tests demonstrated a mean error magnitude of 0.7mm (SD=0.3mm). For SRS treatments, mean deviation between frame-based and image-guided initial positioning was 1.0mm (SD=0.5mm). Fusion failures were observed among 3 patients resulting in aberrant predicted shifts. The image-guidance system detected frame slippage in one case. The mean intra-fraction shift magnitude observed for the BRW frame was 0.4mm (SD=0.3mm) compared to 0.7mm (SD=0.5mm) for the fractionated patients with the mask system. CONCLUSIONS: The overall system accuracy is similar to that reported for invasive frame-based SRS. The intra-fraction motion was larger with mask-immobilization, but remains within a range appropriate for stereotactic treatment. These results support clinical implementation of frameless radiosurgery using the Novalis Body Exac-Trac system. Copyright 2010 Elsevier Ireland Ltd. All rights reserved.
Authors: Vikren Sarkar; Adam Paxton; Martin W Szegedi; Hui Zhao; Long Huang; Geoff Nelson; Yu-Huei Jessica Huang; Fanchi Su; Prema Rassiah-Szegedi; Bill J Salter Journal: J Radiosurg SBRT Date: 2018
Authors: Roshan S Prabhu; Anees Dhabaan; William A Hall; Tomi Ogunleye; Ian Crocker; Walter J Curran; Hui-Kuo G Shu Journal: J Neurooncol Date: 2013-02-26 Impact factor: 4.130
Authors: Selvan Rajakesari; Nils D Arvold; Rachel B Jimenez; Laura W Christianson; Margaret C Horvath; Elizabeth B Claus; Alexandra J Golby; Mark D Johnson; Ian F Dunn; Eudocia Q Lee; Nancy U Lin; Scott Friesen; Edward G Mannarino; Matthew Wagar; Fred L Hacker; Stephanie E Weiss; Brian M Alexander Journal: J Neurooncol Date: 2014-07-25 Impact factor: 4.130