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World Journal of Radiology
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1949-8470
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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

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©2012 Baishideng Publishing Group Co.
World J Radiol. May 28, 2012; 4(5): 193-207
Published online May 28, 2012. doi: 10.4329/wjr.v4.i5.193
Table 3 Ray’s criteria for evaluation of spinal bony fusion[107]
Ray’s criteria for radiographic assessment of bridging osseous fusion
Less than 3 degrees of inter-segmental position change on lateral flexion and extension views
No lucent area around the implant
Minimal loss of disk height
No fracture of the device, graft, or vertebra
No sclerotic changes in the graft or adjacent vertebra
Visible bone formation in or about the graft material
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