Abstract
We report the imaging findings of 2 cases of cardiac amyloidosis, one light chain (AL) type and another transthyretin (ATTR) type. The images showed 11C-Pittsburgh compound B (11C-PIB) uptake in the heart with AL amyloidosis, whereas the ATTR amyloidosis showed 11C-PIB-negative and 99mTc-PYP-positive uptake in the heart. It demonstrated that using 99mTc-PYP scintigraphy and 11C-PIB PET/CT might be able to differentiate these 2 major types of cardiac amyloidosis noninvasively.
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