多层螺旋CT评价脊柱金属置入物产生金属伪影及其影响因素  

Evaluation of metal artifacts formation and its influencing factors of spinal metal implants using multi-slice spiral CT

作　　者：吴骏峰[1] 杨长伟[1] 李明[1] 

机构地区：[1]上海长海医院骨科,上海市200433

出　　处：《中国组织工程研究与临床康复》2009年第9期1677-1680,共4页Journal of Clinical Rehabilitative Tissue Engineering Research

基　　金：国家自然科学基金(30872611);上海市科委基础研究项目(07jc14069)~~

摘　　要：随着脊柱外科基础和临床研究的不断进展,椎弓根钉棒系统已经成为最常用的脊柱外科置入物。多层螺旋CT和磁共振成像可以产生切面图像。磁共振成像能够评估骨髓和软组织,对没有金属置入物的患者,术后磁共振成像检查仍是首选的成像模式。但对手术后带有金属置入物的患者,由于存在金属伪影,其成像质量大大降低。因此,多层螺旋CT就成为对置入材料、皮质骨及其解剖关系的重要评估手段。文章着重讨论在金属置入物存在的条件下,多层螺旋CT检查时金属伪影的产生机制、影响因素及伪影的消减技术问题。Transpedicular screw and rod internal fixation system is the common implants in spinal surgery. Multi-slice spiral CT and magnetic resonance imaging can generate section image, become routine imaging modality in the assessment of the postoperative spinal patients. Magnetic resonance imaging can evaluate the bone marrow and soft tissue, which is the first choice for examination. However, to the patients with metal implants, the existed metal artifacts can decrease the imaging quality. Therefore, multi-slice spiral CT is an important evaluation method for inserted material, os integumentale and anatomy. This article reviewed the production mechanism of metal-related artifacts, influencing factors and decreasing technique.

关 键 词：脊柱 金属置入物 多层螺旋CT伪影 

分 类 号：R318[医药卫生—生物医学工程]