Comparison between 7 Tesla and 3 Tesla MRI for characterizing orbital lesions |
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| Institution: | 1. Department of Neuroradiology, Foundation Adolphe de Rothschild Hospital, 75019 Paris, France;2. Université Paris Cité, Faculté de Médecine, 75006 Paris, France;3. Department of Ophthalmology, Byers Eye Institute, Stanford Hospital, 94305 Stanford, CA, USA;4. Department of Neuroradiology, Stanford Hospital, 94305 Stanford, CA, USA;5. Lucas Center for Imaging, 94305 Stanford, CA, USA;1. Department of Radiology, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama 700-8558, Japan;2. Department of Radiological Technology, Faculty of Health Sciences, Okayama University, 2-5-1 Shikata-cho kita-ku, Okayama 700-8558, Japan;3. Department of Radiology, Faculty of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan;4. Center for Innovative Clinical Medicine, Okayama University Hospital, 2-5-1 Shikata-cho kita-ku, Okayama 700-8558, Japan;5. Division of Medical Informatics, Okayama University Hospital, 2-5-1 Shikatacho, Kitaku, Okayama 700-8558, Japan;6. Department of Diagnostic and Therapeutic Radiology, Kawasaki Medical School Medical Center, 2-6-1 Nakasange Kita-ku, Okayama 700-8505, Japan;1. AP-HP, Pitié-Salpêtrière - Charles Foix Hospital, Department of Interventional Neuroradiology, F75013, Paris, France;2. Sorbonne University, 75013 Paris, France;3. AP-HP, Pitié-Salpêtrière - Charles Foix Hospital, Department of Oncology, 75013, Paris, France;4. AP-HP, Pitié-Salpêtrière - Charles Foix Hospital, Department of Orthopedic surgery, 75013, Paris, France;5. AP-HP, Pitié-Salpêtrière - Charles Foix Hospital, Department of Hematology, 75013, Paris, France;6. AP-HP, Pitié-Salpêtrière - Charles Foix Hospital, Department of Anesthesiology and Neuro-Intensive Care, 75013, Paris, France;7. Department of Radiology, Clinique Bizet, 75016 Paris France;8. GRC BioFast, Sorbonne University, 75013 Paris, France;1. Department of Radiology, University of British Columbia, Vancouver, BC, British Columbia V5Z 1M9, Canada;2. Department of Radiology, McMaster University, Hamilton, ON, Ontario L8L 2 × 2, Canada;1. IMAGINE UR UM 103, Montpellier University, Department of Medical Imaging, Nîmes University Hospital, 30029 Nîmes, France;2. Department of Medical Physics, CHU Nimes, Univ Montpellier, 34000 Montpellier, France;1. Department of Radiology, CHU de Besancon, 25030 Besancon, France;2. Department of Radiology, Centre Leon Bérard, 69008 Lyon, France;3. Nanomedicine laboratory EA4662. University of Franche-Comté, 25000 Besancon, France |
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| Abstract: | PurposeCharacterizing orbital lesions remains challenging with imaging. The purpose of this study was to compare 3 Tesla (T) to 7 T magnetic resonance imaging (MRI) for characterizing orbital lesions.Materials and methodsThis prospective single-center study enrolled participants presenting with orbital lesions from May to October 2019, who underwent both 7 T and 3 T MRI examinations. Two neuroradiologists, blinded to all data, read both datasets independently and randomly. They assessed general characteristics of each orbital lesion as well as image quality and presence of artifacts. Comparison between both datasets was made using Fisher exact test.ResultsSeven patients (4 women, 3 men) with a median age of 52 years were enrolled. Orbital lesion conspicuity was better scored at 7 T compared to 3 T MRI, with 3/7 lesions (43%) scored as very conspicuous at 7 T compared to 0/7 lesion (0%) at 3 T, although the difference was not significant (P = 0.16). Delineation of lesion margins was better scored at 7 T compared to 3 T with 3/7 lesions (43%) scored as very well delineated on 7 T compared to 0/7 lesions (0%) at 3 T, although the difference was not significant (P = 0.34). Details of internal structure were better assessed at 7 T compared to 3 T, with 4/7 lesions (57%) displaying numerous internal details compared to 0/7 lesions (0%) at 3 T (P = 0.10). Internal microvessels were visible in 3/7 lesions (43%) at 7 T compared to 0/7 lesions (0%) at 3 T (P = 0.19).ConclusionAlthough no significant differences were found between 7 T and 3 T MRI, assumably due to a limited number of patients, our study suggests that 7 Tesla MRI might help improve the characterization of orbital lesions. However, further studies with more patients are needed. |
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