Whole body MRI (WB-MRI) is increasingly used to image the skeleton in haematological diseases such as multiple myeloma (MM) and inflammatory disorders such as spondyloarthritis. WB-MRI can be used to acquire fat fraction (FF) maps, which can assess disease severity and treatment response. However, patients with bone pain find it difficult to lie in the scanner for long periods, necessitating the use of parallel imaging to accelerate the acquisition. The aim of this study was to determine the extent to which parallel imaging causes noise artifacts and fat-water swaps in FF maps, and to assess their impact on FF measurements.
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