Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Usefulness of Three Dimensional Proset MR Images for Diagnosis of Symptomatic L5-S1 Foraminal and Extraforaminal Stenosis

  • Kim, Sang Woo (Department of Neurosurgery, Yeungnam University College of Medicine) ;
  • Kim, Chang Hwan (Department of Neurosurgery, Saint Mary's Hospital) ;
  • Kim, Min Su (Department of Neurosurgery, Yeungnam University College of Medicine) ;
  • Jung, Young Jin (Department of Neurosurgery, Yeungnam University College of Medicine) ;
  • Byun, Woo Mok (Department of Diagnostic Radiology, Yeungnam University College of Medicine)
  • Received : 2013.03.14
  • Accepted : 2013.07.17
  • Published : 2013.07.28
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Abstract

Objective : To suggest a new useful diagnostic technique, principles of the selective excitation technique-magnetic resonance images (Proset-MRI), and to know the precise radiologic findings that can prove symptomatic foraminal and extraforaminal stenosis at L5-S1. Methods : Nineteen patients with symptomatic L5-S1 stenosis were checked by Proset-MRI. Four patients were performed decompressive surgery and 15 patients were performed selective nerve root block (SNRB) at L5. The pain scale of patients was checked by Visual Analogue Scale (VAS) scores at the pre- and post-treatment state. Results : Proset-MRI findings of patients with symptomatic stenosis are root swelling (RS) and indentation. The comparisons with VAS scores had a meaningful statistical result at each RS (p<0.01) and indentation (p<0.01). However, the findings of RS combined with indentation lacked statistical significance (p=0.0249). In addition, according to a comparison with the treatment modalities, reducing of VAS scores had statistical meaningful significance in decompressive surgery cases (p<0.01), and also in SNRB cases (p<0.01) after a 3-month follow-up period. Conclusion : The three dimensional Proset-MRI is very useful and sensitive technique to diagnose the symptomatic foraminal and extraforaminal stenosis at L5-S1.

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References

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