Figure 4 | Scientific Reports

Figure 4

From: Histogram analysis of T2 mapping for detecting early involvement of extraocular muscles in patients with thyroid-associated ophthalmopathy

Figure 4

Sketch option of the generation of ratio of the signal intensity and histogram analysis. (a) Measurement of signal intensities of extraocular muscles using iterative decomposition of water and fat with echo asymmetric and least-squares estimation (IDEAL) image. (b) T2 overlay map of the left medial rectus, the rainbow bar represents the range of T2 values in this specific volume of interest (VOI). Notes: the signal intensities of each muscle and the brain were measured as shown in the left orbit and brain. To standardize the signal intensity of each muscle, the SIR in each muscle to that in white matter of the same slice was calculated. IR inferior rectus, IR lateral rectus, MR medial rectus, SO superior oblique, SMG superior muscle group, WM white matter.

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