Morphometry of the Retrobulbar Human Optic Nerve: Comparison between Conventional Sonography and Ultrafast Magnetic Resonance Sequences

Lagrèze, Wolf A.; Lazzaro, Alexander; Weigel, Matthias; Hansen, Hans-Christian; Hennig, Jürgen; Bley, Thorsten Alexander

doi:10.1167/iovs.06-1075

Cited by 64 publications

(70 citation statements)

References 37 publications

(53 reference statements)

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“…Additionally, MR imaging provides higher soft-tissue contrast and free section orientation capabilities compared with CT and appears to be more accurate in assessing the ON than sonography. 16 Despite these advantages, the ON has been technically difficult to image because of its small size: It is 0.4 -0.6 cm in diameter within the orbit.…”

Section: Mr Imaging Findingsmentioning

confidence: 99%

MR Imaging of Papilledema and Visual Pathways: Effects of Increased Intracranial Pressure and Pathophysiologic Mechanisms

Passi

Degnan

Levy

2012

AJNR Am J Neuroradiol

105

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SUMMARY: Papilledema, defined as swelling of the optic disc, frequently occurs in the setting of increased ICP and in a variety of medical conditions, including pseudotumor cerebri, sinus thrombosis, intracerebral hemorrhage, frontal lobe neoplasms, and Chiari malformation. Noninvasive imaging of the ON is possible by using MR imaging, with a variety of findings occurring in the setting of papilledema, including flattening of the posterior sclera, protrusion of the optic disc, widening of the ONS, and tortuosity of the ON. Early recognition of papilledema and elevated ICP is of paramount importance for ensuring restoration of vision. Newer advanced MR imaging techniques such as fMRI and DTI may prove useful in the future to assess the potential effects of papilledema on retinal and visual pathway integrity.ABBREVIATIONS: ICP ϭ intracranial pressure; IIH ϭ idiopathic intracranial hypertension; ON ϭ optic nerve; ONS ϭoptic nerve sheath; SAS ϭ subarachnoid space

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Section: Mr Imaging Findingsmentioning

confidence: 99%

MR Imaging of Papilledema and Visual Pathways: Effects of Increased Intracranial Pressure and Pathophysiologic Mechanisms

Passi

Degnan

Levy

2012

AJNR Am J Neuroradiol

105

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“…In patients with papilledema, the subarachnoid space dilates, the optic nerve is compressed, and the nerve sheath is widened [117]. The precision of MRI seems to be higher than that of ultrasound [118]. Rigorous studies have been done to determine the ability of MRI to detect increased ICP using ONSD.…”

Section: Dopplermentioning

confidence: 99%

Non-invasive Methods of Estimating Intracranial Pressure

et al. 2011

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Non-invasive measurement of intracranial pressure can be invaluable in the management of critically ill patients. We performed a comprehensive review of the literature to evaluate the different methods of measuring intracranial pressure. Several methods have been employed to estimate intracranial pressure, including computed tomography, magnetic resonance imaging, transcranial Doppler sonography, near-infrared spectroscopy, and visual-evoked potentials. In addition, multiple techniques of measuring the optic nerve and the optic nerve sheath diameter have been studied. Ultrasound measurements of the optic nerve sheath diameter and Doppler flow are especially promising and may be useful in selected settings.

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“…After establishing optic nerve diameters in normal subjects, 23 we recorded data of OND in patients with POAG and correlated these measurements with the aforementioned parameters. For this purpose, we used MRI, SLP, SLT, OCT, and SAP to examine a cohort of normal subjects and patients with POAG at different stages of progression.…”

mentioning

confidence: 99%

Retrobulbar Optic Nerve Diameter Measured by High-Speed Magnetic Resonance Imaging as a Biomarker for Axonal Loss in Glaucomatous Optic Atrophy

Lagrèze

Gaggl

Weigel

et al. 2009

Invest. Ophthalmol. Vis. Sci.

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Morphometry of the Retrobulbar Human Optic Nerve: Comparison between Conventional Sonography and Ultrafast Magnetic Resonance Sequences

Cited by 64 publications

References 37 publications

MR Imaging of Papilledema and Visual Pathways: Effects of Increased Intracranial Pressure and Pathophysiologic Mechanisms

MR Imaging of Papilledema and Visual Pathways: Effects of Increased Intracranial Pressure and Pathophysiologic Mechanisms

Non-invasive Methods of Estimating Intracranial Pressure

Retrobulbar Optic Nerve Diameter Measured by High-Speed Magnetic Resonance Imaging as a Biomarker for Axonal Loss in Glaucomatous Optic Atrophy

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