Fig. 2.

Degraded PET/MR image quality due to dental implants in a 50-year-old woman with recurrent squamous cell carcinoma T3N0M0 of the oral cavity. Moderate PET/MR image quality (score 2) and good PET/CT quality (score 3). Fused image quality, lesion conspicuity and anatomic location were comparable by both modalities (score 3). a CT image, b water-only Dixon image, c fused PET and CT image, d fused PET and water-only Dixon MR image, e PET image from PET/CT, f PET image from PET/MR. Note the comparable visualization and anatomic localization of the tumour (long arrows) along the right horizontal branch of the mandible (short arrows, dental artefact)