The influence of knee bolster on lumbar spinal stenosis parameters on MR images

Skeletal Radiology
Azaria SimonovichLeonid Kalichman

Abstract

To estimate the effect of the knee bolster use during an MRI on lumbar spinal stenosis parameters and low back pain-related disability. A repeated-measurement study of 27 males and 19 females with mean age 55.78 ± 14.36, referred for an MRI of the lumbar spine due to low back pain, performed with and without standard knee bolster. A radiologist evaluated the lumbar lordosis Cobb's angle, the cross-sectional area of the right and left intervertebral foramina and spinal canal at L1-L2, L2-L3, L3-L4 spinal levels. Spinal symptoms were evaluated by the Oswestry Disability Questionnaire. The Cobb angle of lumbar lordosis was found significantly greater on an MRI performed without knee bolster than with bolster (47.30 ± 9.90 vs. 42.57 ± 10.62, p < 0.001). The cross-sectional area of the intervertebral foramina and spinal canal at all evaluated levels was smaller when performed without knee bolster than with bolster. However, differences were significant only at the L1-L2 level and in the spinal canal at all evaluated levels. The Cobb angle, measured with and without knee bolster, showed significant positive correlations with back pain while standing and walking. The spinal canal area without knee bolster showed greater correlations w...Continue Reading

References

Oct 3, 2000·Spine·J Fairbank
Jan 17, 2007·Journal of Manipulative and Physiological Therapeutics·Marianne Løgtholt AndreasenHanne B Albert
Oct 8, 2013·The Spine Journal : Official Journal of the North American Spine Society·Ella Been, Leonid Kalichman
Aug 13, 2015·Medicine·David KuboschKaywan Izadpanah

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