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Imaging of Herniated Discs of the Cervical Spine: Inter-Modality Differences between 64-Slice Multidetector CT and 1.5-T MRI.

Yi JS, Cha JG, Han JK, Kim HJ - Korean J Radiol (2015)

Bottom Line: Also, the interobserver agreements for the NIS (CT; k-value, 0.85 and MRI; k-value, 0.88) and epicenter (CT; k-value, 0.74 and MRI; k-value, 0.70) evaluations by two readers were substantial.MDCT tended to underestimate the extent of herniated disc lesions compared with MRI.MDCT images have a tendency to underestimate the anterior/posterior extent of the herniated disc compared with MRI.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Soonchunhyang University Bucheon Hospital, Bucheon 420-767, Korea.

ABSTRACT

Objective: To assess inter-modality variability when evaluating cervical intervertebral disc herniation using 64-slice multidetector-row computed tomography (MDCT) and magnetic resonance imaging (MRI).

Materials and methods: Three musculoskeletal radiologists independently reviewed cervical spine 1.5-T MRI and 64-slice MDCT data on C2-3 though C6-7 of 51 patients in the context of intervertebral disc herniation. Interobserver and inter-modality agreements were expressed as unweighted kappa values. Weighted kappa statistics were used to assess the extents of agreement in terms of the number of involved segments (NIS) in disc herniation and epicenter measurements collected using MDCT and MRI.

Results: The interobserver agreement rates upon evaluation of disc morphology by the three radiologists were in fair to moderate agreement (k = 0.39-0.53 for MDCT images; k = 0.45-0.56 for MRIs). When the disc morphology was categorized into two and four grades, the inter-modality agreement rates were moderate (k-value, 0.59) and substantial (k-value, 0.66), respectively. The inter-modality agreements for evaluations of the NIS (k-value, 0.78) and the epicenter (k-value, 0.79) were substantial. Also, the interobserver agreements for the NIS (CT; k-value, 0.85 and MRI; k-value, 0.88) and epicenter (CT; k-value, 0.74 and MRI; k-value, 0.70) evaluations by two readers were substantial. MDCT tended to underestimate the extent of herniated disc lesions compared with MRI.

Conclusion: Multidetector-row computed tomography and MRI showed a moderate-to-substantial degree of inter-modality agreement for the assessment of herniated cervical discs. MDCT images have a tendency to underestimate the anterior/posterior extent of the herniated disc compared with MRI.

No MeSH data available.


Related in: MedlinePlus

Inter-modality agreement rates between MDCT and MRI findings at five disc levels.Kappa values of C2-3, C3-4, C4-5, C5-6, and C6-7 disc levels are 0.67, 0.73, 0.68, 0.56, and 0.49, respectively, as depicted by central dot with whiskers, indicating upper and lower limits of 95% CIs. Decreasing trend is observed from C3-4 to C6-7 disc level. CI = confidence interval, MDCT = multidetector-row computed tomography, MRI = magnetic resonance imaging
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Figure 5: Inter-modality agreement rates between MDCT and MRI findings at five disc levels.Kappa values of C2-3, C3-4, C4-5, C5-6, and C6-7 disc levels are 0.67, 0.73, 0.68, 0.56, and 0.49, respectively, as depicted by central dot with whiskers, indicating upper and lower limits of 95% CIs. Decreasing trend is observed from C3-4 to C6-7 disc level. CI = confidence interval, MDCT = multidetector-row computed tomography, MRI = magnetic resonance imaging

Mentions: The respective interobserver agreement rates between MDCT and MRI findings according to disc level were determined; the kappa values of the C2-3, C3-4, C4-5, C5-6, and C6-7 disc levels were 0.67, 0.73, 0.68, 0.56, and 0.49, respectively. The highest k-value was for the C3-4 disc level, and the lowest for the C5-6 level, suggesting a decreasing trend from C3-4 to C6-7 (Fig. 5). However, no significant differences among the k-values were noted (p = 0.140-0.710).


Imaging of Herniated Discs of the Cervical Spine: Inter-Modality Differences between 64-Slice Multidetector CT and 1.5-T MRI.

Yi JS, Cha JG, Han JK, Kim HJ - Korean J Radiol (2015)

Inter-modality agreement rates between MDCT and MRI findings at five disc levels.Kappa values of C2-3, C3-4, C4-5, C5-6, and C6-7 disc levels are 0.67, 0.73, 0.68, 0.56, and 0.49, respectively, as depicted by central dot with whiskers, indicating upper and lower limits of 95% CIs. Decreasing trend is observed from C3-4 to C6-7 disc level. CI = confidence interval, MDCT = multidetector-row computed tomography, MRI = magnetic resonance imaging
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4499554&req=5

Figure 5: Inter-modality agreement rates between MDCT and MRI findings at five disc levels.Kappa values of C2-3, C3-4, C4-5, C5-6, and C6-7 disc levels are 0.67, 0.73, 0.68, 0.56, and 0.49, respectively, as depicted by central dot with whiskers, indicating upper and lower limits of 95% CIs. Decreasing trend is observed from C3-4 to C6-7 disc level. CI = confidence interval, MDCT = multidetector-row computed tomography, MRI = magnetic resonance imaging
Mentions: The respective interobserver agreement rates between MDCT and MRI findings according to disc level were determined; the kappa values of the C2-3, C3-4, C4-5, C5-6, and C6-7 disc levels were 0.67, 0.73, 0.68, 0.56, and 0.49, respectively. The highest k-value was for the C3-4 disc level, and the lowest for the C5-6 level, suggesting a decreasing trend from C3-4 to C6-7 (Fig. 5). However, no significant differences among the k-values were noted (p = 0.140-0.710).

Bottom Line: Also, the interobserver agreements for the NIS (CT; k-value, 0.85 and MRI; k-value, 0.88) and epicenter (CT; k-value, 0.74 and MRI; k-value, 0.70) evaluations by two readers were substantial.MDCT tended to underestimate the extent of herniated disc lesions compared with MRI.MDCT images have a tendency to underestimate the anterior/posterior extent of the herniated disc compared with MRI.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Soonchunhyang University Bucheon Hospital, Bucheon 420-767, Korea.

ABSTRACT

Objective: To assess inter-modality variability when evaluating cervical intervertebral disc herniation using 64-slice multidetector-row computed tomography (MDCT) and magnetic resonance imaging (MRI).

Materials and methods: Three musculoskeletal radiologists independently reviewed cervical spine 1.5-T MRI and 64-slice MDCT data on C2-3 though C6-7 of 51 patients in the context of intervertebral disc herniation. Interobserver and inter-modality agreements were expressed as unweighted kappa values. Weighted kappa statistics were used to assess the extents of agreement in terms of the number of involved segments (NIS) in disc herniation and epicenter measurements collected using MDCT and MRI.

Results: The interobserver agreement rates upon evaluation of disc morphology by the three radiologists were in fair to moderate agreement (k = 0.39-0.53 for MDCT images; k = 0.45-0.56 for MRIs). When the disc morphology was categorized into two and four grades, the inter-modality agreement rates were moderate (k-value, 0.59) and substantial (k-value, 0.66), respectively. The inter-modality agreements for evaluations of the NIS (k-value, 0.78) and the epicenter (k-value, 0.79) were substantial. Also, the interobserver agreements for the NIS (CT; k-value, 0.85 and MRI; k-value, 0.88) and epicenter (CT; k-value, 0.74 and MRI; k-value, 0.70) evaluations by two readers were substantial. MDCT tended to underestimate the extent of herniated disc lesions compared with MRI.

Conclusion: Multidetector-row computed tomography and MRI showed a moderate-to-substantial degree of inter-modality agreement for the assessment of herniated cervical discs. MDCT images have a tendency to underestimate the anterior/posterior extent of the herniated disc compared with MRI.

No MeSH data available.


Related in: MedlinePlus