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British Journal of Radiology (2006) 79, 372-377
© 2006 British Institute of Radiology
doi: 10.1259/bjr/26216335
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Observer variation in the evaluation of lumbar herniated discs and root compression: spiral CT compared with MRI

J C van Rijn, MD1, N Klemetso, MD2, J B Reitsma, MD, PhD1, P M Bossuyt, PhD1, F J Hulsmans, MD, PhD2, W C Peul, MD, PhD4, G J den Heeten, MD, PhD2, J Stam, MD, PhD3 and C B L M Majoie, MD, PhD2

Departments of 1 Clinical Epidemiology and Biostatistics, 2 Radiology and, 3 Neurology, Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam and the, 4 Department of Neurosurgery, Leiden University Medical Center, Albinusdreef 2, 2333 ZA, Leiden, The Netherlands


Figure 1
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  		Figure 1. 22-year-old male with left-sided lumbosacral radicular syndrome of L5 and paresis of the anterior tibial muscle and with hypaesthesia of L5 and S1. Images show a left-sided herniated disc at level L4–L5 with root compression of L5 reported at CT as well as at MRI by both observers (arrows). (a) Axial CT L4–L5. (b) Axial T2 weighted MRI L4–L5.

 

Figure 2
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  		Figure 2. 43-year-old male with left-sided lumbosacral radicular syndrome of S1. At both CT and MRI there is disagreement on root compression of L5 on the opposite side of signs and symptoms. (a) Axial CT L4–L5. Observers disagree on whether root L5 on the right (asymptomatic side), is compressed (arrow). (b) Axial T2 weighted MRI L4–L5. Observers agree on compression of L5 on the right (asymptomatic side) (arrow).

 

Figure 3
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  		Figure 3. 58-year-old male with left-sided lumbosacral radicular syndrome of L3. (a) Axial CT L3–L4. Both observers reported "definitely no compression" of L3 on the left (arrow). (b) Axial T2 weighted MRI L3–L4. Both observers reported "definitely compression" of L3 on the left (arrow).

 




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