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수술 후 요추 추간판 탈출증에서 역동적 조영증강 자기공명영상의 유용성

Authors
 남지은  ;  정태섭  ;  김영수  ;  조용은  ;  박미숙 
Citation
 Journal of the Korean Radiologist Society (대한방사선의학회지), Vol.40(2) : 231-236, 1999 
Journal Title
 Journal of the Korean Radiologist Society (대한방사선의학회지) 
ISSN
 0301-2867 
Issue Date
1999
Keywords
Spine, intervertebral disks ; Spine, surgery ; Magnetic resonance(MR), rapid imaging ; Magnetic resonance(MR),contrast enhancement
Abstract
PURPOSE: To compare the usefulness of dynamic contrast enhanced lumber spine MR Imaging with that ofconventional delayed contrast enhanced MR imaging in the assessment of postoperative herniated lumbar disc. MATERIALS AND METHODS: Forty-one postoperative herniated lumbar disc (HLD) lesions of 32 patients with back painwere examined with MR imaging(1.5T, Vision, Siemens, Germany). Five-phase dynamic 2D FLASH sagittalimages(TR/TE=118.1 msec) was obtained every 19 seconds with a 4 minutes delayed image after contrast injection. Asseen on delayed images, the discs were assessed as recurred, fibrosis, or no change. On dynamic images, thepattern of enhancement was evaluated as follows : Type I(no change in peripheral disc enhancement between theearly and late phase);or Type II(minimal internal extension of marginal smooth enhancement during the latephase);or Type III(marked internal extension f peripheral irregular enhancement). Dynamic and delayed imaging werecompared, and early epidural space enhancement with rapid wash-out was also evaluated. RESULTS: of 41postoperative HLDs, 39 lesions showed peripheral contrast enhancement. Evaluation depended on delayed imaging, andwas as follows:recurred HLD(n=27);fibrosis(n=5);no change in postoperative disc(n=7). On dynamic contrast-enhancedimaging, enhancement patterns were Type I(n=29), Type II(n=7), and Type III(n=3). In 29 Type-I lesions, there wereno significant differences in image findings between dynamic and delayed images. However, in the lesions(typeII:n=7, type III:n=3), findings additional to those revealed by delayed images were demonstrated by dynamiccontrast-enhanced MR imaging. Nine of the ten Type-II and III lesions were diagnosed as recurred HLD. On dynamicOn dynamic images, five lesions showed early epidural space enhancement. CONCLUSION: dymamic contrast-enhancedlumbar spine MR imaging provided additional findings such as increased peripheral disc enhancement, and epiduralspace enhancement, which cannot be detected on conventional delayed images. Inrecurred postoperative herniatedlumbar discs, these findings are frequent.
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Park, Mi-Suk(박미숙) ORCID logo https://orcid.org/0000-0001-5817-2444
Chung, Tae Sub(정태섭)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/172592
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