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KMID : 1103720120660060551
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Journal of the Korean Society of Radiology
2012 Volume.66 No. 6 p.551 ~ p.558
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Three-Dimension Magnetic Resonance Lumbosacral Radiculography by Principles of the Selective Excitation Technique Imaging in the Diagnosis of Symptomatic Foraminal Stenosis
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Lim Ji-Kyung
Byun Woo-Mok
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Abstract
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Purpose: To investigate significance of three-dimension (3D) magnetic resonance (MR) lumbosacral radiculography by principles of the selective excitation technique (Proset) in the diagnosis of symptomatic foraminal stenosis.
Materials and Methods: A total of 288 foramina in 48 patients were analyzed (from L3-4 to L5-S1). Conventional spin echo sequence and 3D coronal fast-field echo sequences with selective water excitation by Proset were acquired. Through conventional MR imaging, the presence of lumbar foraminal stenosis was evaluated. Three morphologic changes (swelling, indentation, and tilting angle abnormality) of corresponding nerve roots were assessed on 3D MR lumbosacral radiculography. Relationships between the three morphologic findings and corresponding symptoms were evaluated.
Results: In 288 foramina, symptomatic and asymptomatic foraminal stenoses were found in 49 and 14 foramina, respectively. In symptomatic foraminal stenosis, swelling, indentation and tilting angle abnormality of the nerve root were found in 36, 18, and 10 foramina, respectively. One or more of the three findings was found in 46 foramina. In 12 foramina with asymptomatic foraminal stenosis, no morphologic changes were found. A statistically significant difference among three morphologic changes of nerve root in symptomatic foraminal stenosis was found (χ2 test, p < 0.001).
Conclusion: 3D MR lumbosacral radiculography by Proset was useful for the detection of morphologic changes of the nerve root for the diagnosis of symptomatic foraminal stenosis.
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KEYWORD
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Foraminal Stenosis , Three-Dimension Magnetic Resonance Lumbosacral Radiculography , Proset
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