Co-registration of free breathing coronal lung images in Fourier decomposition (FD) lung MRI is a crucial part of the processing pipeline for this technique. It is vital that the registration works on the correct parts of the image and does not interfere with the data in an unfavourable way. This work aims to evaluate the extent to which registration affects the perfusion, and by association the ventilation results of this technique, using a breath-hold acquisition as a gold standard. Results encourage the generation of confidence maps to aid interpretation of FD lung MR results, particularly in regions affected by registration.
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