Jun Haneda1, Kazuhiro Ishikawa2, Kouichirou Okamoto3. 1. Department of Radiology, Nagaoka Chuo General Hospital, Nagaoka, Japan. 2. Niigata Kenshin Plaza, Niigata, Japan. 3. Department of Translational Research, Center for Bioresource-based Researches, Brain Research Institute, Niigata University, Niigata, Japan.
Abstract
INTRODUCTION: Three-dimensional (3D) T1-weighted imaging (T1WI) is used for evaluation of the facial nerve. The signal intensity of normal and pathological facial nerves has been well evaluated at both 1.5T and 3.0T MRI after gadolinium (Gd)-enhancement with various pulse sequences. However, the continuity of the facial nerve has not been evaluated on 3D-T1WI. This study aims to compare the continuity of the normal facial nerve in the temporal bone demonstrated on T1-weighted volume isotropic turbo spin echo acquisition (T1-VISTA), which is a spin-echo sequence, to that on T1-weighted fast field echo (T1-FFE), which is a gradient-echo sequence, at 3.0T MRI. METHODS: Forty-four normal facial nerves in 22 healthy volunteers were imaged with both sequences using 3.0T MRI without Gd-enhancement. The facial nerves were evaluated visually by two neuroradiologists in four anatomical segments with a 3-point grading system of continuity. The continuity was assessed by summing the grades of the four segments as a total score. The grades at each segment and the total scores were compared statistically between the T1-VISTA and T1-FFE. RESULTS: The grades in all segments and the total score were significantly higher with T1-VISTA than those with T1-FFE. CONCLUSIONS: T1-VISTA was superior to demonstrate the facial nerve as a continuous anatomical structure in the temporal bone at 3.0T MRI.
INTRODUCTION: Three-dimensional (3D) T1-weighted imaging (T1WI) is used for evaluation of the facial nerve. The signal intensity of normal and pathological facial nerves has been well evaluated at both 1.5T and 3.0T MRI after gadolinium (Gd)-enhancement with various pulse sequences. However, the continuity of the facial nerve has not been evaluated on 3D-T1WI. This study aims to compare the continuity of the normal facial nerve in the temporal bone demonstrated on T1-weighted volume isotropic turbo spin echo acquisition (T1-VISTA), which is a spin-echo sequence, to that on T1-weighted fast field echo (T1-FFE), which is a gradient-echo sequence, at 3.0T MRI. METHODS: Forty-four normal facial nerves in 22 healthy volunteers were imaged with both sequences using 3.0T MRI without Gd-enhancement. The facial nerves were evaluated visually by two neuroradiologists in four anatomical segments with a 3-point grading system of continuity. The continuity was assessed by summing the grades of the four segments as a total score. The grades at each segment and the total scores were compared statistically between the T1-VISTA and T1-FFE. RESULTS: The grades in all segments and the total score were significantly higher with T1-VISTA than those with T1-FFE. CONCLUSIONS: T1-VISTA was superior to demonstrate the facial nerve as a continuous anatomical structure in the temporal bone at 3.0T MRI.
Authors: Yubo Fan; Rueben A Banalagay; Nathan D Cass; Jack H Noble; Kareem O Tawfik; Robert F Labadie; Benoit M Dawant Journal: Annu Int Conf IEEE Eng Med Biol Soc Date: 2021-11
Authors: Johannes Taeger; Franz Tassilo Müller-Graff; Lukas Ilgen; Phillip Schendzielorz; Rudolf Hagen; Tilman Neun; Kristen Rak Journal: OTO Open Date: 2021-09-24
Authors: David P Herrmann; Franz-Tassilo Müller-Graff; Stefan Kaulitz; Mario Cebulla; Anja Kurz; Rudolf Hagen; Tilmann Neun; Kristen Rak Journal: Sci Rep Date: 2022-08-04 Impact factor: 4.996