Evaluation of trigeminal nerve tractography using two-fold-accelerated simultaneous multi-slice readout-segmented echo planar diffusion tensor imaging

Koh, Yeow Hoay; Shih, Yang-hsin; Lim, Soo Lee; Kiew, Yen San; Lim, Ee Wei; Ng, See Mui; Ooi, Leon Qi Rong; Tan, Wen Qi; Chung, Yiu‐Cho; Rumpel, Helmut; Tan, Eng King; Chan, Ling‐Ling

doi:10.1007/s00330-020-07193-x

Cited by 8 publications

(4 citation statements)

References 40 publications

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“…Then, deterministic fiber tracking ( Mori et al, 1999 ) was carried out to reconstruct the whole brain fibers, using the Fiber Assignment by Continuous Tracking (FACT) algorithm. If the angle between the current and the previous streamline was greater than 45° ( Li et al, 2013 ) or the FA value smaller than 0.2 ( Koh et al, 2020 ), the current streamline tracking procedure was terminated. The orientation patch was achieved by inverting the Z component of the vector.…”

Section: Methodsmentioning

confidence: 99%

Aberrant rich club organization in patients with obsessive-compulsive disorder and their unaffected first-degree relatives

Peng

Yang

et al. 2021

NeuroImage: Clinical

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Section: Methodsmentioning

confidence: 99%

Aberrant rich club organization in patients with obsessive-compulsive disorder and their unaffected first-degree relatives

Peng

Yang

et al. 2021

NeuroImage: Clinical

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“…Diffusion tensor imaging, a technique based on the principle of diffusion motion of water protons in nerve tissue, has recently received attention in TN studies. Several studies support the use of DTI in TN for its ability to expose the CNV at a microstructure level 8 , 15 , 19 , 31 – 37 . DTI has been used to evaluate the efficacy of MVD and gamma knife radiosurgery (GKRS) with the REZ for TN as the therapeutic target 12 , 20 , 22 .…”

Section: Discussionmentioning

confidence: 93%

A novel indicator to predict the outcome of percutaneous stereotactic radiofrequency rhizotomy for trigeminal neuralgia patients: diffusivity metrics of MR-DTI

Su,

Wang,

Wang

et al. 2024

Sci Rep

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Magnetic resonance-diffusion tensor imaging (MR-DTI) has been used in the microvascular decompression and gamma knife radiosurgery in trigeminal neuralgia (TN) patients; however, use of percutaneous stereotactic radiofrequency rhizotomy (PSR) to target an abnormal trigeminal ganglion (ab-TG) is unreported. Fractional anisotropy (FA), mean and radial diffusivity (MD and RD, respectively), and axial diffusivity (AD) of the trigeminal nerve (CNV) were measured in 20 TN patients and 40 healthy control participants immediately post PSR, at 6-months, and at 1 year. Longitudinal alteration of the diffusivity metrics and any correlation with treatment effects, or prognoses, were analyzed. In the TN group, either low FA (value < 0.30) or a decreased range compared to the adjacent FA (dFA) > 17% defined an ab-TG. Two-to-three days post PSR, all 15 patients reported decreased pain scores with increased FA at the ab-TG (P < 0.001), but decreased MD and RD (P < 0.01 each). Treatment remained effective in 10 of 14 patients (71.4%) and 8 of 12 patients (66.7%) at the 6-month and 1-year follow-ups, respectively. In patients with ab-TGs, there was a significant difference in treatment outcomes between patients with low FA values (9 of 10; 90%) and patients with dFA (2 of 5; 40%) (P < 0.05). MR-DTI with diffusivity metrics correlated microstructural CNV abnormalities with PSR outcomes. Of all the diffusivity metrics, FA could be considered a novel objective quantitative indicator of treatment effects and a potential indicator of PSR effectiveness in TN patients.

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“…Corrections need to be made by increasing the scan time, which limits its use in the body. 15,18 To ensure sufficient image quality, we reduced the acquisition time of Rs-EPI as much as possible while maintaining a good model fit. Both Liney 19 and Klingebiel et al 15 have shown that Rs-EPI is superior to conventional ss-EPI with better image quality.…”

Section: Discussionmentioning

confidence: 99%

“…Motion‐induced phase changes during diffusion‐encoded gradients lead to deformation of the image domain between readout segments. Corrections need to be made by increasing the scan time, which limits its use in the body 15,18 . To ensure sufficient image quality, we reduced the acquisition time of Rs‐EPI as much as possible while maintaining a good model fit.…”

Section: Discussionmentioning

confidence: 99%

MR Diffusion Kurtosis Imaging (DKI) of the Normal Human Uterus in Vivo During the Menstrual Cycle

Li,

Chen,

et al. 2023

Magnetic Resonance Imaging

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BackgroundThe uterus undergoes dynamic changes throughout the menstrual cycle. Diffusion kurtosis imaging (DKI) is based on the non‐Gaussian distribution of water molecules and can perhaps represent the changes of uterine microstructure.PurposeTo investigate the temporal changes in DKI‐parameters of the normal uterine corpus and cervix during the menstrual cycle.Study TypeProspective.Population21 healthy female volunteers (26.64 ± 4.72 years) with regular menstrual cycles (28 ± 7 days).Field Strength/SequenceReadout segmentation of long variable echo‐trains (RESOLVE)‐based DKI and fast spin‐echo T2‐weighted sequences at 3.0T.AssessmentEach volunteer was scanned during the menstrual phase, ovulatory phase, and luteal phase. Regions of interest (ROI) were manually delineated in the endometrium, junctional zone, and myometrium of the uterine body, and in the mucosal layer, fibrous stroma layer, and loose stroma layer of the cervix. The mean Kapp (diffusion kurtosis coefficient), Dapp (diffusion coefficient), and ADC (apparent diffusion coefficient) values were measured in the ROI.Statistical TestsANOVA with Bonferroni or Tamhane correction. Intraclass correlation coefficient (ICC) for assessing agreement. P < 0.05 was considered statistically significant.ResultsDuring the menstrual cycle, the highest Kapp (0.848 ± 0.184) and lowest Dapp (1.263 ± 0.283 *10−3 mm2/sec) values were found in the endometrium during the menstrual phase. The Dapp values for the myometrium were significantly higher than those of the endometrium and the junctional zone in every phase. Meanwhile, the Dapp values for the three zonal structures of the cervix during ovulation were significantly higher than those during the luteal phase. However, there was no significant difference in the ADC values of the loose stroma between ovulation and the luteal phase (P = 0.568). The reproducibility of DKI parameters was good (ICC, 0.857–0.944).Data ConclusionDKI can show dynamic changes of the normal uterus during the menstrual cycle.Level of Evidence2Technical EfficacyStage 2

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Evaluation of trigeminal nerve tractography using two-fold-accelerated simultaneous multi-slice readout-segmented echo planar diffusion tensor imaging

Cited by 8 publications

References 40 publications

Aberrant rich club organization in patients with obsessive-compulsive disorder and their unaffected first-degree relatives

Aberrant rich club organization in patients with obsessive-compulsive disorder and their unaffected first-degree relatives

A novel indicator to predict the outcome of percutaneous stereotactic radiofrequency rhizotomy for trigeminal neuralgia patients: diffusivity metrics of MR-DTI

MR Diffusion Kurtosis Imaging (DKI) of the Normal Human Uterus in Vivo During the Menstrual Cycle

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