Department of Radiation Oncology, Boston Medical Center and Boston University School of Medicine, Boston, MA 02118, USA.
Int J Radiat Oncol Biol Phys. 2012 Nov 1;84(3):596-601. doi: 10.1016/j.ijrobp.2012.01.033. Epub 2012 Apr 13.
To determine whether the use of routine image guided radiation therapy (IGRT) using pretreatment on-board imaging (OBI) with orthogonal kilovoltage X-rays reduces treatment delivery errors.
A retrospective review of documented treatment delivery errors from 2003 to 2009 was performed. Following implementation of IGRT in 2007, patients received daily OBI with orthogonal kV X-rays prior to treatment. The frequency of errors in the pre- and post-IGRT time frames was compared. Treatment errors (TEs) were classified as IGRT-preventable or non-IGRT-preventable.
A total of 71,260 treatment fractions were delivered to 2764 patients. A total of 135 (0.19%) TEs occurred in 39 (1.4%) patients (3.2% in 2003, 1.1% in 2004, 2.5% in 2005, 2% in 2006, 0.86% in 2007, 0.24% in 2008, and 0.22% in 2009). In 2007, the TE rate decreased by >50% and has remained low (P = .00007, compared to before 2007). Errors were classified as being potentially preventable with IGRT (e.g., incorrect site, patient, or isocenter) vs. not. No patients had any IGRT-preventable TEs from 2007 to 2009, whereas there were 9 from 2003 to 2006 (1 in 2003, 2 in 2004, 2 in 2005, and 4 in 2006; P = .0058) before the implementation of IGRT.
IGRT implementation has a patient safety benefit with a significant reduction in treatment delivery errors. As such, we recommend the use of IGRT in routine practice to complement existing quality assurance measures.
确定是否使用常规的基于图像引导的放射治疗(IGRT),使用预处理的在线成像(OBI)和正交千伏 X 射线,减少治疗的传递误差。
回顾性分析了 2003 年至 2009 年记录的治疗传递误差。在 2007 年实施 IGRT 后,患者在治疗前每天接受正交千伏 X 射线的 OBI。比较 IGRT 前后的误差频率。治疗误差(TE)被分为 IGRT 可预防和非 IGRT 可预防。
共向 2764 名患者提供了 71260 个治疗分数。在 39 名患者(1.4%)中发生了 135 个(0.19%)TE(2003 年 3.2%,2004 年 1.1%,2005 年 2.5%,2006 年 2%,2007 年 0.86%,2008 年 0.24%,2009 年 0.22%)。2007 年,TE 率下降了>50%,且一直保持较低水平(P=0.00007,与 2007 年前相比)。误差分为 IGRT 可预防(例如,位置、患者或等中心错误)和不可预防。从 2007 年到 2009 年,没有患者出现任何 IGRT 可预防的 TE,而在 IGRT 实施前的 2003 年至 2006 年期间有 9 例(2003 年 1 例,2004 年 2 例,2005 年 2 例,2006 年 4 例)。
IGRT 的实施具有患者安全效益,可以显著减少治疗传递误差。因此,我们建议在常规实践中使用 IGRT,以补充现有的质量保证措施。