Literature DB >> 24559840

Visualizing Meyer's loop: A comparison of deterministic and probabilistic tractography.

Ylva Lilja1, Maria Ljungberg2, Göran Starck3, Kristina Malmgren4, Bertil Rydenhag5, Daniel T Nilsson6.   

Abstract

BACKGROUND: Diffusion tensor tractography of the anterior extent of the optic radiation - Meyer's loop - prior to temporal lobe resection (TLR) may reduce the risk for postoperative visual field defect. Currently there is no standardized way to perform tractography.
OBJECTIVE: To visualize Meyer's loop using deterministic (DTG) and probabilistic tractography (PTG) at different probability levels, with the primary aim to explore possible differences between methods, and the secondary aim to explore anatomical accuracy.
METHODS: Twenty-three diffusion tensor imaging exams (11 controls and 7 TLR-patients, pre- and post-surgical) were analyzed using DTG and PTG thresholded at probability levels 0.2%, 0.5%, 1%, 5% and 10%. The distance from the tip of the temporal lobe to the anterior limit of Meyer's loop (TP-ML) was measured in 46 optic radiations. Differences in TP-ML between the methods were compared. Results of the control group were compared to dissection studies and to a histological atlas.
RESULTS: For controls and patients together, there were statistically significant differences (p<0.01) for TP-ML between all methods thresholded at PTG ≤1% compared to all methods thresholded at PTG ≥5% and DTG. There were no statistically significant differences between PTG 0.2%, 0.5% and 1% or between PTG 5%, 10% and DTG. For the control group, PTG ≤1% showed a closer match to dissection studies and PTG 1% showed the best match to histological tracings of Meyer's loop.
CONCLUSIONS: Choice of tractography method affected the visualized location of Meyer's loop significantly in a heterogeneous, clinically relevant study group. For the controls, PTG at probability levels ≤1% was a closer match to dissection studies. To determine the anterior extent of Meyer's loop, PTG is superior to DTG and the probability level of PTG matters.
Copyright © 2014 Elsevier B.V. All rights reserved.

Entities:  

Keywords:  Diffusion tensor imaging; Epilepsy surgery; Meyer's loop; Optic radiation; Temporal lobe; Tractography

Mesh:

Year:  2014        PMID: 24559840     DOI: 10.1016/j.eplepsyres.2014.01.017

Source DB:  PubMed          Journal:  Epilepsy Res        ISSN: 0920-1211            Impact factor:   3.045


  16 in total

1.  Optic radiation mapping reduces the risk of visual field deficits in anterior temporal lobe resection.

Authors:  Zhiqiang Cui; Zhipei Ling; Longsheng Pan; Huifang Song; Xiaolei Chen; Wenjian Shi; Zhiqiang Liu; Qun Wang; Zhizhong Zhang; Ye Li; Xuejie Wang; Yeqing Qing; Xin Xu; Zhiqi Mao; Bainan Xu; Xinguang Yu; Guoming Luan
Journal:  Int J Clin Exp Med       Date:  2015-08-15

2.  Distinguishing and quantification of the human visual pathways using high-spatial-resolution diffusion tensor tractography.

Authors:  Arash Kamali; Khader M Hasan; Pavani Adapa; Azadeh Razmandi; Zafer Keser; John Lincoln; Larry A Kramer
Journal:  Magn Reson Imaging       Date:  2014-04-13       Impact factor: 2.546

Review 3.  Strengths and limitations of tractography methods to identify the optic radiation for epilepsy surgery.

Authors:  Ylva Lilja; Daniel T Nilsson
Journal:  Quant Imaging Med Surg       Date:  2015-04

4.  Active delineation of Meyer's loop using oriented priors through MAGNEtic tractography (MAGNET).

Authors:  Maxime Chamberland; Benoit Scherrer; Sanjay P Prabhu; Joseph Madsen; David Fortin; Kevin Whittingstall; Maxime Descoteaux; Simon K Warfield
Journal:  Hum Brain Mapp       Date:  2016-09-20       Impact factor: 5.038

5.  Comparison of multiple tractography methods for reconstruction of the retinogeniculate visual pathway using diffusion MRI.

Authors:  Jianzhong He; Fan Zhang; Guoqiang Xie; Shun Yao; Yuanjing Feng; Dhiego C A Bastos; Yogesh Rathi; Nikos Makris; Ron Kikinis; Alexandra J Golby; Lauren J O'Donnell
Journal:  Hum Brain Mapp       Date:  2021-05-12       Impact factor: 5.399

6.  Improved Framework for Tractography Reconstruction of the Optic Radiation.

Authors:  Eloy Martínez-Heras; Federico Varriano; Vesna Prčkovska; Carlos Laredo; Magí Andorrà; Elena H Martínez-Lapiscina; Anna Calvo; Erika Lampert; Pablo Villoslada; Albert Saiz; Alberto Prats-Galino; Sara Llufriu
Journal:  PLoS One       Date:  2015-09-16       Impact factor: 3.240

7.  Can musical training influence brain connectivity? Evidence from diffusion tensor MRI.

Authors:  Emma Moore; Rebecca S Schaefer; Mark E Bastin; Neil Roberts; Katie Overy
Journal:  Brain Sci       Date:  2014-06-10

8.  Predicting Surgery Targets in Temporal Lobe Epilepsy through Structural Connectome Based Simulations.

Authors:  Frances Hutchings; Cheol E Han; Simon S Keller; Bernd Weber; Peter N Taylor; Marcus Kaiser
Journal:  PLoS Comput Biol       Date:  2015-12-10       Impact factor: 4.475

9.  Meyer's loop asymmetry and language lateralisation in epilepsy.

Authors:  Mark Nowell; Sjoerd B Vos; Meneka Sidhu; Kaitlin Wilcoxen; Narek Sargsyan; Sebastien Ourselin; John S Duncan
Journal:  J Neurol Neurosurg Psychiatry       Date:  2015-09-18       Impact factor: 10.154

10.  Semi-Automatic Segmentation of Optic Radiations and LGN, and Their Relationship to EEG Alpha Waves.

Authors:  Emmanuelle Renauld; Maxime Descoteaux; Michaël Bernier; Eleftherios Garyfallidis; Kevin Whittingstall
Journal:  PLoS One       Date:  2016-07-06       Impact factor: 3.240

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