剖宫产术后再次妊娠足月引产与自然临产比较

Advancement of magnetic resonance imaging in radiation therapy

目的比较剖宫产术后再次妊娠足月引产与自然临产阴道试产成功率及母婴并发症。方法我院于2012年3月至2013年10月收治仅有一次子宫下段剖宫产术史,孕周≥37周,无阴道试产禁忌证,且有试产意愿的瘢痕子宫孕妇,采用前瞻性队列研究的方法 ,有引产指征实施引产者为引产组,自然临产者为自然临产组,对两组阴道试产成功率、母婴并发症进行比较分析。结果自然临产组阴道试产成功率80.5%(223/277),而引产组阴道试产成功率56.25%(18/32),引产组较自然临产组试产成功率低,差异有统计学意义,两组间母婴并发症无统计学差异。结论 剖宫产术后再次足月妊娠,如有产科引产指征,引产可作为一种分娩方式的选择,但引产是降低试产成功率的一个独立因素,需谨慎选择。

Magnetic resonance imaging（MRI） plays a pivotal role in the course of cancer diagnosis and treatment. As an important anti-cancer modality, nowadays, various radiation techniques almost rely on the advanced imaging techniques including MRI. MRI has been integrated all the workflows of radiation treatment. They included cancer staging, treatment decision, the evaluation of prognosis and prediction. In this literature review, we mainly discussed the simulation, dose calculation, the monitoring and correction of tumor or organ motion that were based on MRI techniques. The latest research and development of MRI-related software and hardware as the novel radiation devices were also referred in this review.