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MR Imaging of the Lumbar Spine: Relation of Posterior Soft-Tissue Edema-Like Signal and Body Weight

Hongyu Shi1, Mark E. Schweitzer, John A. Carrino and Laurence Parker

1 All authors: Department of Radiology, Thomas Jefferson University Hospital, 111 S. 11th St., Philadelphia, PA 19107.



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  		Fig. 1. —38-year-old woman with back pain. Axial T2-weighted MR image (TR/TE, 5300/65) shows triangular form of posterior subcutaneous soft-tissue edema (arrowheads) along deep fascia plane extending to deep fat layer posterior to spinous process.

 


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  		Fig. 2. —52-year-old woman (weight, 54 kg) from weight group 1. Sagittal T2-weighted MR image (TR/TE, 3067/92) of lumbar spine shows no edema in posterior soft tissue.

 


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  		Fig. 3. —Sagittal T2-weighted MR image (TR/TE, 3150/92) of lumbar spine reveals grade 4 posterior lumbar soft-tissue edema in this 40-year-old woman (weight, 79 kg) from weight group 2. Arrowheads indicate extent of edema.

 


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  		Fig. 4. —52-year-old man (weight, 136 kg) from weight group 3. Sagittal T2-weighted MR image (TR/TE, 4000/80) of lumbar spine shows grade 5 edema (arrowheads) and discrete fluid collection in posterior lumbar soft tissue.

 


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  		Fig. 5. —53-year-old woman with history of polymyositis who presented with acute back pain. Sagittal T2-weighted MR image (TR/TE, 4000/84) shows severe subcutaneous soft-tissue edema (arrowheads) and edema in erector spinae muscles (arrows).

 

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