MR neurographic orthopantomogram: Ultrashort echo‐time imaging of mandibular bone and teeth complemented with high‐resolution morphological and functional MR neurography

Manoliu, Andrei; Ho, Michael; Nanz, Daniel; Dappa, Evelyn; Boss, Andreas; Grodzki, David; Liu, Wei; Chhabra, Avneesh; Andreisek, Gustav; Kuhn, Félix P.

doi:10.1002/jmri.25178

Cited by 30 publications

(29 citation statements)

References 26 publications

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“…Our study showed that FA values of the IANs ranged from 0.37 to 0.49, which were similar to the results in their study. 18 Our study also showed that the 95% CIs of intrasubject variabilities in ADC and FA were within a narrow range. According to several previous studies Dentomaxillofac Radiol, 45, 20160200 birpublications.org/dmfr DTI of the IAN using 3T MRI that evaluated DTI of the peripheral nerves, the FA of an injured nerve became significantly lower than that of the normal nerve.…”

Section: Discussionsupporting

confidence: 69%

“…Manoliu et al 18 initially reported the quantitative evaluation of the IAN using DTI data in a small number of healthy volunteers. Our study showed that FA values of the IANs ranged from 0.37 to 0.49, which were similar to the results in their study.…”

Section: Discussionmentioning

confidence: 99%

“…These potential distortions might be reduced by the latest MRI techniques for diffusion-weighted imaging, such as zoomed diffusion-weighted EPI and readout segmented EPI. 18,27,28 In the future, more precise DTI data will be provided with the advent of innovative MRI techniques and devices.…”

Section: Discussionmentioning

confidence: 99%

“…To date, only a few studies reported the application of DTI to the IAN. [16][17][18] In particular, to our knowledge, there has been only one study that has quantitatively evaluated the physiological function of the IAN using the FA and diffusivity. 18 Accordingly, DTI of the IANs has not been well covered in the literature and still requires systematic assessment.…”

Section: Introductionmentioning

confidence: 99%

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Diffusion tensor imaging of the inferior alveolar nerve using 3T MRI: a study for quantitative evaluation and fibre tracking

Kotaki¹,

Sakamoto²,

Kretapirom³

et al. 2016

Dentomaxillofacial Radiology

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Objectives: Diffusion tensor imaging (DTI) can provide structural information and objective values for nerves. The aims of this study were to perform quantitative evaluation and fibre tracking of the normal inferior alveolar nerve (IAN) using DTI on 3.0-T MRI. Methods: DTI was applied to 92 IANs of 46 healthy volunteers. Circular regions of interest (ROIs) were placed on three different positions at the mandibular foramen, second molar and mental foramen of each nerve on apparent diffusion coefficient (ADC) and fractional anisotropy (FA) maps, and the ADC and FA of each ROI were measured. Differences in the values arising from the nerve positions were evaluated. Furthermore, fibre tracking of the IANs was performed by tractography, and the quality of visualization was evaluated. Results: There were no significant differences in the ADC and FA between the right and left sides regardless of the anteroposterior positions. Regarding differences arising from the anteroposterior measurement positions, the ADC and FA showed no significant differences (p . 0.017), except for the ADCs between the positions at the mandibular foramen and mental foramen in the left side (p 5 0.0068). Overall, 70 (76%) of the 92 IANs could be visualized fully or partially by tractography. Conclusions: The ADC and FA of the IAN were successfully obtained from healthy volunteers using DTI and were confirmed to be symmetrical regardless of the measurement positions. DTI is a feasible technique for the quantitative evaluation and visualization of the IAN.

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Section: Discussionsupporting

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diffusion tensor imaging of the inferior alveolar nerve using 3T MRI: a study for quantitative evaluation and fibre tracking

Kotaki¹,

Sakamoto²,

Kretapirom³

et al. 2016

Dentomaxillofacial Radiology

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“…Naturally, the aforementioned gain in SNR could have been invested in increasing other parameters, which might be favourable when evaluating other anatomical regions of the dentomaxillofacial region. 38 In particular, decreasing the spatial resolution (i.e. decreasing the matrix size while keeping the field of view constant) and/or increasing the number of signal SD, standard deviation.…”

Section: High-permittivity Dielectric Padsmentioning

confidence: 99%

MR imaging of the temporomandibular joint: comparison between acquisitions at 7.0 T using dielectric pads and 3.0 T

Kuhn¹,

Spinner

Grande³

et al. 2017

Dentomaxillofacial Radiology

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Objectives: To qualitatively and quantitatively compare MRI of the temporomandibular joint (TMJ) at 7.0 T using high-permittivity dielectric pads and 3.0 T using a clinical highresolution protocol. Methods: Institutional review board-approved study with written informed consent. 12 asymptomatic volunteers were imaged at 7.0 and 3.0 T using 32-channel head coils. Highpermittivity dielectric pads consisting of barium titanate in deuterated suspension were used for imaging at 7.0 T. Imaging protocol consisted of oblique sagittal proton density weighted turbo spin echo sequences. For quantitative analysis, pixelwise signal-to-noise ratio maps of the TMJ were calculated. For qualitative analysis, images were evaluated by two independent readers using 5-point Likert scales. Quantitative and qualitative results were compared using t-tests and Wilcoxon signed-rank tests, respectively. Results: TMJ imaging at 7.0 T using high-permittivity dielectric pads was feasible in all volunteers. Quantitative analysis showed similar signal-to-noise ratio for both field strengths (mean ± SD; 7.0 T, 13.02 ± 3.92; 3.0 T, 14.02 ± 3.41; two-sample t-tests, p 5 0.188). At 7.0 T, qualitative analysis yielded better visibility of all anatomical subregions of the temporomandibular disc (anterior band, intermediate zone and posterior band) than 3.0 T (Wilcoxon signed-rank tests, p , 0.05, corrected for multiple comparisons). Conclusions: MRI of the TMJ at 7.0 T using high-permittivity dielectric pads yields superior visibility of the temporomandibular disc compared with 3.0 T.

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Simultaneous multislice readout‐segmented echo planar imaging for accelerated diffusion tensor imaging of the mandibular nerve: A feasibility study

Manoliu

Piccirelli

et al. 2017

Magnetic Resonance Imaging

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MR neurographic orthopantomogram: Ultrashort echo‐time imaging of mandibular bone and teeth complemented with high‐resolution morphological and functional MR neurography

Cited by 30 publications

References 26 publications

Diffusion tensor imaging of the inferior alveolar nerve using 3T MRI: a study for quantitative evaluation and fibre tracking

Diffusion tensor imaging of the inferior alveolar nerve using 3T MRI: a study for quantitative evaluation and fibre tracking

MR imaging of the temporomandibular joint: comparison between acquisitions at 7.0 T using dielectric pads and 3.0 T

Simultaneous multislice readout‐segmented echo planar imaging for accelerated diffusion tensor imaging of the mandibular nerve: A feasibility study

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