Aortic valve stenosis—multimodality assessment with PET/CT and PET/MRI

Figures

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  Figure 1.. Basis of PET/CT imaging. PET/CT scanners incorporate functional data from PET and anatomical information from CT imaging on the same gantry allowing near simultaneous acquisition. Fused PET/CT images then allow localization of specific pathological processes to individual structures such as the aortic valve in this example. (Images reconstructed using FusionQuant)

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  Figure 2.. 18F-fluoride uptake in a patient with moderate aortic stenosis. The columns represent the imaging modality and rows the corresponding view. Panels A, F and G show calcification of the aortic valve (non-coronary cusp predominantly, yellow arrows). Panels B, G and L show the CMRA in the same views. Calcification cannot be appreciated on MR but the raphe between the NCC and LCC appears thickened (B). PET/CT shows uptake overlaying these areas of calcification (Panels C, (H and M). Note uptake also over the calcified mitral annulus (M, red arrow) and arterial wall of the descending aorta (M, red arrow). Fused PET/MR shows 18F-fluoride uptake in the same areas as the PET/CT (D, I and N).