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Figure 1 | Journal of Cardiovascular Magnetic Resonance

Figure 1

From: Accuracy and reproducibility of semi-automated late gadolinium enhancement quantification techniques in patients with hypertrophic cardiomyopathy

Figure 1

Example of the expert Late Gadolinium Enhancement (LGE) segmentation procedure using a manual adjustment of the signal intensity (SI) threshold for each LGE image. A manual SI threshold (circled) was adjusted using a slide bar until visually identified LGE was segmented in accordance to expert opinion. Panel A shows a raw LGE image prior to application of segmentation. Panel B shows over-representation of LGE at a low SI threshold of 11. Panel C shows "optimal segmentation" at a threshold of 36. Panel D shows under-representation of LGE at a higher threshold of 78. The signal threshold of 36 (arrow) was applied for this image and the corresponding LGE area employed as a reference standard for semi-automated technique comparison.

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