SCIC技术对LAVA多期动态MRI定量分析的影响

发布时间：2018-01-13 08:05

本文关键词：SCIC技术对LAVA多期动态MRI定量分析的影响　出处：《放射学实践》2016年07期 　论文类型：期刊论文

【摘要】：目的:探讨表面线圈信号校准技术(SCIC)对LAVA多期动态增强MRI定量分析的影响。方法:采用不同浓度的钆溶液作为实验模型模拟多期动态MRI的定量分析的T1mapping过程,以单层反转恢复快速自旋回波序列(IRFSE)作为金标准测量不同浓度钆溶液的T1值,同时分别以使用及不使用SCIC技术的可变翻转角LAVA测量其T1值,并与金标准测的T1值比较。结果:去除SCIC技术时,可变翻转角LAVA与IR-FSE测量T1值的相关系数为0.964(P0.001),且随钆溶液浓度增高,测得的T1值减低;使用SCIC技术后,可变翻转角LAVA与IR-FSE测量T1值的相关系数为0.667(P0.001),且所测得的T1值与浓度无明显递减关系。结论:SCIC技术影响测得T1值的准确性,从而影响LAVA多期动态MRI定量分析。
[Abstract]:Objective: To investigate the signal calibration of surface coil technology (SCIC) enhanced the effect of MRI on quantitative analysis of multi period dynamic LAVA. Methods: T1mapping process by quantitative analysis of gadolinium solution of different concentration as a model for multi period dynamic MRI, with the single inversion recovery fast spin echo sequence (IRFSE) as the gold standard for measuring gadolinium solution different concentrations of T1, respectively at the same time to use and do not use the SCIC variable flip angle LAVA technology to measure the T1 value, and compared with the gold standard. The results of T1 value: the removal of SCIC, LAVA and IR-FSE correlation coefficient of angle measuring T1 value over 0.964 variable (P0.001), and with gadolinium solution the measured concentration increased, T1 value decreased; the use of SCIC technology, the correlation coefficient of angle LAVA and IR-FSE measurement of T1 value to 0.667 variable (P0.001), and the measured T1 values had no significant relationship with concentration. Conclusion: the effect of SCIC technology T1 measured value The accuracy of the LAVA multiphase dynamic MRI quantitative analysis is influenced by the accuracy.

【作者单位】：中国医学科学院肿瘤医院影像诊断科;
【分类号】：R445.2
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