钛合金植入物在1.5T场强下不同序列参数伪影大小探讨  

Evaluation of the size of artifacts under 1.5T MRI different sequence parameters caused by titanium alloy implants

作　　者：王传兵[1] 邹月芬[1] 胡志毅[2] 吕征[2] 李大鹏[1] 储彬[1] 

机构地区：[1]南京医科大学第一附属医院放射科,江苏南京210029 [2]南京医科大学第一附属医院骨科,江苏南京210029

出　　处：《南京医科大学学报（自然科学版）》2013年第11期1600-1603,共4页Journal of Nanjing Medical University(Natural Sciences)

基　　金：江苏高校优势学科建设工程资助(jx10231801)

摘　　要：目的:比较不同扫描序列导致钛合金植入物伪影的差别;优化扫描参数以期达到高质量扫描图像。方法:制作钛合金水模,进行常规序列扫描以及在sagT2-FSE序列下改变扫描视野、回波链长、带宽等参数观察伪影变化。结果:扫描序列不同,产生的伪影大小不同;扫描视野减小、回波链长缩短以及带宽增加,伪影减小。结论:改变扫描序列、扫描参数可以减少金属植入物带来的伪影,提高图像质量,有助临床诊断。Objective：To compare the variation of titanium implant artifacts in different sequences and optimize scanning parameters for high-quality images. Methods：Titanium water phantom was designed for routine sequences and those with optimized parameters scanning; the variation of artifacts was observed with altering field of view, echo train length,bandwidth in sagT2-FSE sequence. Results：Artifacts were changed under different sequences. The reduction of field of view,the decrease of echo train length and bandwidth reduced the artifacts. Conclusion：Change of the scan sequence or scan parameters could reduce artifacts caused by metal implants, improve image quality, and benefit clinical diagnosis.

关 键 词：金属植入物 金属伪影 MR成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]