Diagnostic Efficacy of Cardiac Scintigraphy with 99mTc-Pyrophosphate for Latent Myocardial Inflammation in Patients with Atrial Fibrillation

Figures

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  Figure 1. An example of a fusion of the scintigraphic and CT images based on the use of surface markings. (a) Scintigraphic image (axial slice) where arrow shows a position of the radioactive marking; (b) CT tomographic image (axial slice) where arrow shows a position of the radiopaque marking; (c) SPECT/CT image where arrow shows a superposition of two markings.

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  Figure 2. Schematic representation of an approach to an assessment of regions of interest.

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  Figure 3. 99mTc-Pyrophosphate-based SPECT combined with multislice CT angiography. (a) Arrows show high-intensity focal accumulation of the radiopharmaceutical in the middle septal part of the left ventricle and low-intensity accumulation in the middle septal part and the anterolateral region of the left ventricle. (b) Arrows show diffuse moderate-intensity pathological accumulation of 99mTc-Pyrophosphate in the middle basal part of the left ventricle. (c) Arrows show focal pathological accumulation of 99mTc-Pyrophosphate in the middle part of the right ventricular free wall.

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  Figure 4. ROC curves for diagnostic values of different coefficients in the diagnosis of myocarditis in patients with atrial fibrillation. (a) ROC curve for the coefficient of focus/lung; (b) ROC curve for the coefficient of focus/vertebral column; (с) ROC curve for the coefficient of focus/sternum; (d) ROC curve for the coefficient of focus/LV pool; and (e) ROC curve for the coefficient of focus/intact myocardium.

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  Figure 5. Schematic representation of the attribution of results to true and false groups when the combination of the visual and quantitative assessments was used for the diagnosis of myocarditis.