Rodrigues Myra F, Veen Sten, van Egmond Jaap, van Hameren Mark, van Oorschot Theodorus, de Vet Steven, van Santvoort Jan P C, Wiggenraad Ruud G J, Mast Mirjam E
Department of Radiation Oncology, Haaglanden Medical Center, Burgemeester Banninglaan 1, 2262 BA Leidschendam, The Netherlands.
Department of Radiation Oncology, Erasmus MC Cancer Institute, Doctor Molewaterplein 40, 3015 GD Rotterdam, The Netherlands.
Phys Imaging Radiat Oncol. 2019 Jul 26;11:30-33. doi: 10.1016/j.phro.2019.07.001. eCollection 2019 Jul.
Reproducible patient positioning is important in radiotherapy (RT) of head-and-neck cancer. We therefore compared set-up errors in head-and-neck RT resulting from three different patient positioning systems. Patients were either treated with a standard head support (SHS) and conventional treatment couch (SHS-3, n = 10), a SHS and rotational couch (SHS-6, n = 10), or an individual head support (IHS) and rotational couch (IHS-6, n = 10). Interfraction mean translation vector lenghts were significantly lower for IHS-6 compared to SHS-3 (0.8 ± 0.3 mm vs. 1.4 ± 0.7 mm, = 0.001). Intrafraction displacement was comparable among cohorts. This study showed that the use of a six degrees of freedom couch combined with an IHS in head-and-neck RT resulted in better interfraction reproducibility.
在头颈癌的放射治疗（RT）中，可重复的患者体位摆放很重要。因此，我们比较了三种不同患者体位摆放系统在头颈RT中产生的摆位误差。患者分别接受标准头部支撑（SHS）和传统治疗床（SHS - 3，n = 10）、SHS和旋转床（SHS - 6，n = 10）或个体化头部支撑（IHS）和旋转床（IHS - 6，n = 10）的治疗。与SHS - 3相比，IHS - 6的分次间平均平移向量长度显著更低（0.8±0.3毫米对1.4±0.7毫米，P = 0.001）。分次内位移在各队列之间相当。本研究表明，在头颈RT中使用六自由度床结合IHS可产生更好的分次间重复性。
