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MR Imaging of Large Multinodular Goiters: Observer Agreement on Volume Versus Observer Disagreement on Dimensions of the Involved Trachea

¹ Department of Endocrinology, Odense University Hospital, DK-5000 Odense, Denmark.
² Department of Radiology, Odense University Hospital, DK-5000 Odense, Denmark.

View larger version (130K): [in a new window]   Fig. 1A. —85-year-old woman with large multinodular goiter. Coronal T1-weighted MR image shows compression of trachea (white arrow) and left-sided substernal extension (black arrows).

View larger version (157K): [in a new window]   Fig. 1B. —85-year-old woman with large multinodular goiter. Axial T1-weighted MR images show marked contours of goiter (B) and tracheal lumen (C).

View larger version (157K): [in a new window]   Fig. 1C. —85-year-old woman with large multinodular goiter. Axial T1-weighted MR images show marked contours of goiter (B) and tracheal lumen (C).

View larger version (14K): [in a new window]   Fig. 2. —Graph shows intraobserver difference of two measurements (difference plot) of goiter volume. Solid line indicates mean value of all measurements (n = 68), and dotted lines denote 95% limits of agreement (mean ± 1.96 SD).

View larger version (14K): [in a new window]   Fig. 3. —Graph shows interobserver difference of two measurements (difference plot) of goiter volume. Solid line indicates mean value of all measurements (n = 68), and dotted lines denote 95% limits of agreement (mean ± 1.96 SD).

View larger version (15K): [in a new window]   Fig. 4. —Graph shows interobserver difference of two measurements (difference plot) of smallest crosssectional area of trachea. Solid line indicates mean value of all measurements (n = 68), and dotted lines denote 95% limits of agreement (mean ± 1.96 SD).

View larger version (14K): [in a new window]   Fig. 5. —Graph shows interobserver difference of two measurements (difference plot) of tracheal volume along initial goiter extension. Solid line indicates mean value of all measurements (n = 68), and dotted lines denote 95% limits of agreement (mean ± 1.96 SD).

View larger version (16K): [in a new window]   Fig. 6. —Graph shows intraobserver correlation of measurements (n = 68) of goiter volume. Regression line is shown.

View larger version (15K): [in a new window]   Fig. 7. —Graph shows interobserver correlation of measurements (n = 68) of goiter volume. Regression line is shown.

View larger version (17K): [in a new window]   Fig. 8. —Graph shows interobserver correlation of measurements (n = 68) of smallest cross-sectional area of trachea. Regression line is shown.

View larger version (15K): [in a new window]   Fig. 9. —Graph shows interobserver correlation of measurements (n = 68) of tracheal volume along initial goiter extension. Regression line is shown.

View larger version (13K): [in a new window]   Fig. 10. —Graph shows difference between MR imaging and sonographic goiter volume measurements (difference plot). Solid line indicates mean value of all measurements (n = 24), and dotted lines denote 95% limits of agreement (mean ± 1.96 SD).

View larger version (17K): [in a new window]   Fig. 11. —Graph shows correlation between MR imaging and sonographic goiter volume measurements (n = 24). Regression line is shown. [Volume on sonography=-10.3 mL + (0.93xvolume on MR imaging)] r=0.93, p<0.001.

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