Soliman Abraam S, Owrangi Amir, Ravi Ananth, Song William Y
Department of Medical Physics, Sunnybrook Health Sciences Centre, Toronto; Physical Sciences Platform, Sunnybrook Research Institute, Toronto.
Department of Medical Physics, Sunnybrook Health Sciences Centre, Toronto; Department of Radiation Oncology, University of Toronto, Toronto, Ontario, Canada.
J Contemp Brachytherapy. 2016 Aug;8(4):363-9. doi: 10.5114/jcb.2016.61817. Epub 2016 Aug 16.
The importance of assessing the metal-induced artefacts in magnetic resonance imaging (MRI)-guided brachytherapy is growing along with the increasing interest of integrating MRI into the treatment procedure of cervical cancer. Examples of metal objects in use include intracavitary cervical applicators and interstitial needles. The induced artefacts increase the uncertainties in the clinical workflow and can be a potential obstacle for the accurate delivery of the treatment. Overcoming this problem necessitates a good understanding of its originating sources. Several efforts are recorded in the literature to quantify the extent of such artefacts, in phantoms and in clinical practice. Here, we elaborate on the origin of metal-induced artefacts in the light of brachytherapy applications, while summarizing recent efforts that have been made to assess and overcome the induced distortions.
随着将磁共振成像（MRI）纳入宫颈癌治疗程序的兴趣日益浓厚，评估MRI引导近距离放射治疗中金属诱导伪影的重要性也在不断增加。使用的金属物体示例包括腔内宫颈施源器和间质针。诱导伪影增加了临床工作流程中的不确定性，并且可能成为准确进行治疗的潜在障碍。克服这个问题需要充分了解其来源。文献中记录了多项在体模和临床实践中量化此类伪影程度的努力。在此，我们根据近距离放射治疗应用阐述金属诱导伪影的起源，同时总结最近为评估和克服诱导畸变所做的努力。
