G Conte1, S Casale1, L Caschera2, F M Lo Russo1, C Paolella3, C Cinnante1, F Di Berardino4, D Zanetti4, D Stocchetti1, E Scola1, L Bassi5, F Triulzi1,6. 1. From the Neuroradiology Unit (G.C., S.C., L.C., F.M.L.R., C.C., D.S., E.S., F.T.). 2. From the Neuroradiology Unit (G.C., S.C., L.C., F.M.L.R., C.C., D.S., E.S., F.T.) luca.caschera@policlinico.mi.it. 3. Department of Advanced Biomedical Sciences (C.P.), University of Naples "Federico II," Naples, Italy. 4. Audiology Unit (F.D.B., D.Z.). 5. NICU (L.B.), Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, Università degli Studi di Milano, Milan, Italy. 6. Department of Pathophysiology and Transplantation (F.T.), University of Milan, Milan, Italy.
Abstract
BACKGROUND AND PURPOSE: Imaging is fundamental to assessing the acoustic pathway in infants with congenital deafness. We describe our depiction of the membranous labyrinth in infants using the heavily T2-weighted 3D FLAIR sequence without a contrast agent. MATERIALS AND METHODS: We retrospectively reviewed 10 infants (20 ears) (median term equivalent age: 2 weeks; IQR: 1-5 weeks) who had undergone brain MR imaging including a noncontrast heavily T2-weighted 3D FLAIR scan of the temporal bone. For each ear, 3 observers analyzed, in consensus, the saccule, the utricle, and the 3 ampullae, assessing the visibility (score 0, not appreciable; score 1, visible without well-defined boundaries; score 2, visible with well-defined boundaries) and morphology ("expected" or "unexpected" compared with adults). The heavily T2-weighted 3D FLAIR sequence was scored for overall quality (score 0, inadequate; score 1, adequate but with the presence of image degradation; score 2, adequate). RESULTS: Six (60%) MR examinations were considered adequate (score 1 or 2). The saccule was visible in 10 ears (83.3%) with an expected morphology in 9 ears (90%). In 1 ear of an infant with congenital deafness, the saccule showed an unexpected morphology. The utricle was visible as expected in 12 ears (100%). The lateral ampulla was visible in 5 ears (41.6%), the superior ampulla was visible in 6 ears (50.0%), and the posterior ampulla was visible in 6 ears (50.0%), always with expected morphology (100%). CONCLUSIONS: MR imaging can depict the membranous labyrinth in infants using heavily T2-weighted 3D FLAIR without an injected contrast agent, but the sequence acquisition time reduces its feasibility in infants undergoing MR studies during natural sleep.
BACKGROUND AND PURPOSE: Imaging is fundamental to assessing the acoustic pathway in infants with congenital deafness. We describe our depiction of the membranous labyrinth in infants using the heavily T2-weighted 3D FLAIR sequence without a contrast agent. MATERIALS AND METHODS: We retrospectively reviewed 10 infants (20 ears) (median term equivalent age: 2 weeks; IQR: 1-5 weeks) who had undergone brain MR imaging including a noncontrast heavily T2-weighted 3D FLAIR scan of the temporal bone. For each ear, 3 observers analyzed, in consensus, the saccule, the utricle, and the 3 ampullae, assessing the visibility (score 0, not appreciable; score 1, visible without well-defined boundaries; score 2, visible with well-defined boundaries) and morphology ("expected" or "unexpected" compared with adults). The heavily T2-weighted 3D FLAIR sequence was scored for overall quality (score 0, inadequate; score 1, adequate but with the presence of image degradation; score 2, adequate). RESULTS: Six (60%) MR examinations were considered adequate (score 1 or 2). The saccule was visible in 10 ears (83.3%) with an expected morphology in 9 ears (90%). In 1 ear of an infant with congenital deafness, the saccule showed an unexpected morphology. The utricle was visible as expected in 12 ears (100%). The lateral ampulla was visible in 5 ears (41.6%), the superior ampulla was visible in 6 ears (50.0%), and the posterior ampulla was visible in 6 ears (50.0%), always with expected morphology (100%). CONCLUSIONS: MR imaging can depict the membranous labyrinth in infants using heavily T2-weighted 3D FLAIR without an injected contrast agent, but the sequence acquisition time reduces its feasibility in infants undergoing MR studies during natural sleep.
Authors: Ali R Sepahdari; Gail Ishiyama; Nopawan Vorasubin; Kevin A Peng; Michael Linetsky; Akira Ishiyama Journal: Clin Imaging Date: 2014-10-16 Impact factor: 1.605
Authors: Anna M H Korver; Richard J H Smith; Guy Van Camp; Mark R Schleiss; Maria A K Bitner-Glindzicz; Lawrence R Lustig; Shin-Ichi Usami; An N Boudewyns Journal: Nat Rev Dis Primers Date: 2017-01-12 Impact factor: 52.329
Authors: Rikkert L Snoeckx; Patrick L M Huygen; Delphine Feldmann; Sandrine Marlin; Françoise Denoyelle; Jaroslaw Waligora; Malgorzata Mueller-Malesinska; Agneszka Pollak; Rafal Ploski; Alessandra Murgia; Eva Orzan; Pierangela Castorina; Umberto Ambrosetti; Ewa Nowakowska-Szyrwinska; Jerzy Bal; Wojciech Wiszniewski; Andreas R Janecke; Doris Nekahm-Heis; Pavel Seeman; Olga Bendova; Margaret A Kenna; Anna Frangulov; Heidi L Rehm; Mustafa Tekin; Armagan Incesulu; Hans-Henrik M Dahl; Desirée du Sart; Lucy Jenkins; Deirdre Lucas; Maria Bitner-Glindzicz; Karen B Avraham; Zippora Brownstein; Ignacio del Castillo; Felipe Moreno; Nikolaus Blin; Markus Pfister; Istvan Sziklai; Timea Toth; Philip M Kelley; Edward S Cohn; Lionel Van Maldergem; Pascale Hilbert; Anne-Françoise Roux; Michel Mondain; Lies H Hoefsloot; Cor W R J Cremers; Tuija Löppönen; Heikki Löppönen; Agnete Parving; Karen Gronskov; Iris Schrijver; Joseph Roberson; Francesca Gualandi; Alessandro Martini; Geneviéve Lina-Granade; Nathalie Pallares-Ruiz; Céu Correia; Graça Fialho; Kim Cryns; Nele Hilgert; Paul Van de Heyning; Carla J Nishimura; Richard J H Smith; Guy Van Camp Journal: Am J Hum Genet Date: 2005-10-19 Impact factor: 11.025