PURPOSE: To evaluate the ability of conventional and ultra-short or zero echo time MRI for imaging of soft and solid dental components in and ex vivo. MATERIALS AND METHODS: Turbo spin echo (TSE), ultra-short echo time (UTE), and zero echo time (ZTE) MRI were performed on extracted (human and equine) teeth and in vivo using whole-body and small-bore MR systems at 3 T, 7T, and 9.4T, respectively. RESULTS: At an isotropic resolution of (600 μm)(3) , strong signal of soft-tissue, e.g., mucosa and nerves with excellent contrast was achieved using TSE at 3T in vivo. No signal, though, was obtained from solid components, e.g., teeth (due to short T(2) ). In contrast, dentin, cementum as well as enamel of extracted teeth were readily depicted using UTE and ZTE at a resolution of ≈ (150 μm)(3) at 7T and 9.4T. In particular, ZTE provided higher signal in enamel. CONCLUSION: As an alternative to X-ray based methods like cone-beam computed tomography (CT) or conventional CT, the presented results demonstrate the potential of ZTE and UTE MRI as a radiation-free imaging modality, delivering contrast of soft and solid components at the same time.
PURPOSE: To evaluate the ability of conventional and ultra-short or zero echo time MRI for imaging of soft and solid dental components in and ex vivo. MATERIALS AND METHODS: Turbo spin echo (TSE), ultra-short echo time (UTE), and zero echo time (ZTE) MRI were performed on extracted (human and equine) teeth and in vivo using whole-body and small-bore MR systems at 3 T, 7T, and 9.4T, respectively. RESULTS: At an isotropic resolution of (600 μm)(3) , strong signal of soft-tissue, e.g., mucosa and nerves with excellent contrast was achieved using TSE at 3T in vivo. No signal, though, was obtained from solid components, e.g., teeth (due to short T(2) ). In contrast, dentin, cementum as well as enamel of extracted teeth were readily depicted using UTE and ZTE at a resolution of ≈ (150 μm)(3) at 7T and 9.4T. In particular, ZTE provided higher signal in enamel. CONCLUSION: As an alternative to X-ray based methods like cone-beam computed tomography (CT) or conventional CT, the presented results demonstrate the potential of ZTE and UTE MRI as a radiation-free imaging modality, delivering contrast of soft and solid components at the same time.
Authors: Andreas Detterbeck; Michael Hofmeister; Elisabeth Hofmann; Daniel Haddad; Daniel Weber; Astrid Hölzing; Simon Zabler; Matthias Schmid; Karl-Heinz Hiller; Peter Jakob; Jens Engel; Jochen Hiller; Ursula Hirschfelder Journal: J Orofac Orthop Date: 2016-04-20 Impact factor: 1.938
Authors: Silwan Mendes; Carin A Rinne; Julia C Schmidt; Dorothea Dagassan-Berndt; Clemens Walter Journal: Clin Oral Investig Date: 2019-12-10 Impact factor: 3.573
Authors: J Gradl; M Höreth; T Pfefferle; M Prager; T Hilgenfeld; D Gareis; P Bäumer; S Heiland; M Bendszus; S Hähnel Journal: Clin Neuroradiol Date: 2016-02-11 Impact factor: 3.649
Authors: Kevin M Rychert; Gang Zhu; Maciej M Kmiec; Venkata K Nemani; Benjamin B Williams; Ann Barry Flood; Harold M Swartz; Barjor Gimi Journal: Proc SPIE Int Soc Opt Eng Date: 2015-03-19