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Published in: Neuroradiology 12/2019

01-12-2019 | Epilepsy | Functional Neuroradiology

Fractional anisotropy of the optic radiations correlates with the visual field after epilepsy surgery

Authors: João Paulo Sant Ana Santos de Souza, Gabriel Ayub, Pamela Castro Pereira, José Paulo Cabral Vasconcellos, Clarissa Yasuda, Andrei Fernandes Joaquim, Helder Tedeschi, Brunno Machado Campos, Fernando Cendes, Enrico Ghizoni

Published in: Neuroradiology | Issue 12/2019

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Abstract

Purpose

This study assessed whether optic radiations (OR) microstructure after temporal lobe epilepsy (TLE) surgery correlated with visual field defects (VFD).

Methods

Patients were subjected to diffusion tensor imaging (DTI) tractography of the OR and Humphrey perimetry after TLE surgery. We used Spearman’s test to verify correlations between tractographic parameters and perimetry mean deviation. Tractographic variables were compared between patients with VFD or intact perimetry. Multiple logistic regression was applied between DTI and perimetry values. DTI sensitivity and specificity were assessed with a receiver operating characteristic (ROC) curve to evaluate VFD.

Results

Thirty-nine patients had reliable perimetry and OR tractography. There was a significant correlation between (1) fractional anisotropy (FA) and both total (rho = 0.569, p = 0.0002) and quadrant (rho = 0.453, p = 0.0037) mean deviation and (2) radial diffusivity and total mean deviation (rho = − 0.350, p = 0.0286). There was no other significant correlation. Patients with VFD showed a significantly lower FA compared with patients with normal perimetry (p = 0.0055), and a 0.01 reduction in FA was associated with a 44% increase in presenting VFD after surgery (confidence interval, CI = 1.10–1.88; p = 0.0082). Using a FA of 0.457, DTI tractography showed a specificity of 95.2% and a sensitivity of 50% to detect VFD after surgery (area under the curve = 0.7619, CI = 0.6020–0.9218).

Conclusion

The postoperative OR microstructure correlated with visual loss after epilepsy surgery. DTI postoperative OR tractography may be helpful in evaluating VFD.
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Literature
4.
go back to reference Tecoma ES, Laxer KD, Barbaro NM, Plant GT (1993) Frequency and characteristics of visual field deficits after surgery for mesial temporal sclerosis. Neurology 43:1235–1238CrossRef Tecoma ES, Laxer KD, Barbaro NM, Plant GT (1993) Frequency and characteristics of visual field deficits after surgery for mesial temporal sclerosis. Neurology 43:1235–1238CrossRef
5.
go back to reference Egan RA, Shults WT, So N, Burchiel K, Kellogg JX, Salinsky M (2000) Visual field deficits in conventional anterior temporal lobectomy versus amygdalohippocampectomy. Neurology 55:1818–1822CrossRef Egan RA, Shults WT, So N, Burchiel K, Kellogg JX, Salinsky M (2000) Visual field deficits in conventional anterior temporal lobectomy versus amygdalohippocampectomy. Neurology 55:1818–1822CrossRef
17.
go back to reference Yaşargil MG, Wieser HG, Valavanis A, von Ammon K, Roth P (1993) Surgery and results of selective amygdala-hippocampectomy in one hundred patients with nonlesional limbic epilepsy. Neurosurg Clin N Am 4:243–261CrossRef Yaşargil MG, Wieser HG, Valavanis A, von Ammon K, Roth P (1993) Surgery and results of selective amygdala-hippocampectomy in one hundred patients with nonlesional limbic epilepsy. Neurosurg Clin N Am 4:243–261CrossRef
18.
go back to reference Yaşargil MG, Teddy PJ, Roth P (1985) Selective amygdalo-hippocampectomy. Operative anatomy and surgical technique. Adv Tech Stand Neurosurg 12:93–123CrossRef Yaşargil MG, Teddy PJ, Roth P (1985) Selective amygdalo-hippocampectomy. Operative anatomy and surgical technique. Adv Tech Stand Neurosurg 12:93–123CrossRef
22.
go back to reference Walsh TJ (2011) Visual fields: examination and interpretation. Oxford University Press, New York Walsh TJ (2011) Visual fields: examination and interpretation. Oxford University Press, New York
27.
go back to reference Hughes TS, Abou-Khalil B, Lavin PJ et al (1999) Visual field defects after temporal lobe resection: a prospective quantitative analysis. Neurology 53:167–172CrossRef Hughes TS, Abou-Khalil B, Lavin PJ et al (1999) Visual field defects after temporal lobe resection: a prospective quantitative analysis. Neurology 53:167–172CrossRef
33.
go back to reference Bengtsson B, Heijl A (1999) Inter-subject variability and normal limits of the SITA standard, SITA fast, and the Humphrey full threshold computerized perimetry strategies, SITA STATPAC. Acta Ophthalmol Scand 77:125–129CrossRef Bengtsson B, Heijl A (1999) Inter-subject variability and normal limits of the SITA standard, SITA fast, and the Humphrey full threshold computerized perimetry strategies, SITA STATPAC. Acta Ophthalmol Scand 77:125–129CrossRef
34.
go back to reference Wild JM, Pacey IE, O’Neill EC, Cunliffe IA (1999) The SITA perimetric threshold algorithms in glaucoma. Invest Ophthalmol Vis Sci 40:1998–2009PubMed Wild JM, Pacey IE, O’Neill EC, Cunliffe IA (1999) The SITA perimetric threshold algorithms in glaucoma. Invest Ophthalmol Vis Sci 40:1998–2009PubMed
35.
go back to reference Budenz DL, Rhee P, Feuer WJ et al (2002) Comparison of glaucomatous visual field defects using standard full threshold and Swedish interactive threshold algorithms. Arch Ophthalmol (Chicago, Ill 1960) 120:1136–1141CrossRef Budenz DL, Rhee P, Feuer WJ et al (2002) Comparison of glaucomatous visual field defects using standard full threshold and Swedish interactive threshold algorithms. Arch Ophthalmol (Chicago, Ill 1960) 120:1136–1141CrossRef
36.
go back to reference Budenz DL, Rhee P, Feuer WJ, McSoley J, Johnson CA, Anderson DR (2002) Sensitivity and specificity of the Swedish interactive threshold algorithm for glaucomatous visual field defects. Ophthalmology 109:1052–1058CrossRef Budenz DL, Rhee P, Feuer WJ, McSoley J, Johnson CA, Anderson DR (2002) Sensitivity and specificity of the Swedish interactive threshold algorithm for glaucomatous visual field defects. Ophthalmology 109:1052–1058CrossRef
37.
go back to reference Sekhar GC, Naduvilath TJ, Lakkai M et al (2000) Sensitivity of Swedish interactive threshold algorithm compared with standard full threshold algorithm in Humphrey visual field testing. Ophthalmology 107:1303–1308CrossRef Sekhar GC, Naduvilath TJ, Lakkai M et al (2000) Sensitivity of Swedish interactive threshold algorithm compared with standard full threshold algorithm in Humphrey visual field testing. Ophthalmology 107:1303–1308CrossRef
38.
go back to reference Wild JM, Pacey IE, Hancock SA, Cunliffe IA (1999) Between-algorithm, between-individual differences in normal perimetric sensitivity: full threshold, FASTPAC, and SITA. Swedish Interactive Threshold algorithm. Invest Ophthalmol Vis Sci 40:1152–1161PubMed Wild JM, Pacey IE, Hancock SA, Cunliffe IA (1999) Between-algorithm, between-individual differences in normal perimetric sensitivity: full threshold, FASTPAC, and SITA. Swedish Interactive Threshold algorithm. Invest Ophthalmol Vis Sci 40:1152–1161PubMed
39.
go back to reference Artes PH, Iwase A, Ohno Y, Kitazawa Y, Chauhan BC (2002) Properties of perimetric threshold estimates from full threshold, SITA standard, and SITA fast strategies. Invest Ophthalmol Vis Sci 43:2654–2659PubMed Artes PH, Iwase A, Ohno Y, Kitazawa Y, Chauhan BC (2002) Properties of perimetric threshold estimates from full threshold, SITA standard, and SITA fast strategies. Invest Ophthalmol Vis Sci 43:2654–2659PubMed
40.
go back to reference Bengtsson B, Heijl A (1998) Evaluation of a new perimetric threshold strategy, SITA, in patients with manifest and suspect glaucoma. Acta Ophthalmol Scand 76:268–272CrossRef Bengtsson B, Heijl A (1998) Evaluation of a new perimetric threshold strategy, SITA, in patients with manifest and suspect glaucoma. Acta Ophthalmol Scand 76:268–272CrossRef
41.
go back to reference Shirato S, Inoue R, Fukushima K, Suzuki Y (1999) Clinical evaluation of SITA: a new family of perimetric testing strategies. Graefes Arch Clin Exp Ophthalmol 237:29–34CrossRef Shirato S, Inoue R, Fukushima K, Suzuki Y (1999) Clinical evaluation of SITA: a new family of perimetric testing strategies. Graefes Arch Clin Exp Ophthalmol 237:29–34CrossRef
43.
go back to reference Castro DPE, Kawase J, Melo LAS (2008) Learning effect of standard automated perimetry in healthy individuals. Arq Bras Oftalmol 71:523–528CrossRef Castro DPE, Kawase J, Melo LAS (2008) Learning effect of standard automated perimetry in healthy individuals. Arq Bras Oftalmol 71:523–528CrossRef
Metadata
Title
Fractional anisotropy of the optic radiations correlates with the visual field after epilepsy surgery
Authors
João Paulo Sant Ana Santos de Souza
Gabriel Ayub
Pamela Castro Pereira
José Paulo Cabral Vasconcellos
Clarissa Yasuda
Andrei Fernandes Joaquim
Helder Tedeschi
Brunno Machado Campos
Fernando Cendes
Enrico Ghizoni
Publication date
01-12-2019
Publisher
Springer Berlin Heidelberg
Keyword
Epilepsy
Published in
Neuroradiology / Issue 12/2019
Print ISSN: 0028-3940
Electronic ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-019-02281-2

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