Observer variation in the sonographic measurement of optic nerve sheath diameter in normal adults

Ballantyne, Stuart; O'Neill, G; Hamilton, Ruth; Hollman, A. S.

doi:10.1016/s0929-8266(02)00036-8

Cited by 225 publications

(212 citation statements)

References 5 publications

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“…and S.T., 15-10 years of experience with conventional sonography and 1-5 years of experience within elastography, respectively) with the patient in the supine position using LOGIQ E9 sonographic system (GE Healthcare) with elastography software and a linear array probe of 6-9 MHz. The optic nerve sheath caliber was measured 3 mm behind the globe between the external hypoechogenic borders using an axis perpendicular to the optic nerve with the eyes keep in nearly a neutral state in supine position [18,19].…”

Section: Equipment and Scanningmentioning

confidence: 99%

Evaluation of the optic nerve using strain and shear wave elastography in patients with multiple sclerosis and healthy subjects

et al. 2017

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Aims: Our aim was to evaluate the elasticity features of the optic nerve using strain (SE) and shear wave elastography (SWE) in multiple sclerosis (MS) patients in comparison with healthy subjects. Material and methods: One hundred and seven optic nerves from 54 MS patients and 118 optic nerves from 59 healthy subjects were examined prospectively by SE and SWE. Optic nerves were divided into three types in accordance to the elasticity designs, as follows: type 1 predominantly blue (hardest tissue); type 2 predominantly blue/green (hard tissue); and type 3 predominantly green (intermediate tissue). Quantitative measurements of optic nerve hardness with SWE were analyzed in kilopascals. Results: Elastographic images from healthy volunteers showed mostly type 3 optic nerves (61.9%); type 2 was also found (38.1%), but type 1 was not observed. Elastographic examination of MS patients showed mostly type 2 optic nerves (88%), while some type 1 (4.6%) and type 3 optic nerves (6.5%) were rarely observed. There was a statistically significant difference in terms of elasticity patterns between patients and healthy volunteers (p<0.001). Statistically significant differences were observed between patients and healthy volunteers in the analysis of SWE values (10.381±3.48 kPa and 33.87±11.64 p<0.001). The receiver operating characteristic curve analysis was perfect (0.993; 95% confidence interval [CI]=0.971–0.999), and a cut-off value of 18.3 kPa shear had very high sensitivity and specificity for the patient group. No significant differences were observed between patients with and without previous optic neuritis. Conclusion: SE and SWE examination findings concerning the optic nerve in MS patients demonstrated remarkable differences according to the healthy group.

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Section: Equipment and Scanningmentioning

confidence: 99%

Evaluation of the optic nerve using strain and shear wave elastography in patients with multiple sclerosis and healthy subjects

et al. 2017

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“…Ultrasonography is also increasing being used to study ocular anatomy and pathologies related to it and can use to follow up patient with ICP. Ultrasound is a reproducible technique in Section: Radiology measurement of the OPND, easily learned with low intra-observer and inter-observer variation [7] . Computed tomography (CT) and magnetic resonance imaging (MRI) are non-invasive methods which can be used to infer ICP and determine the safety or otherwise of lumbar puncture.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonograhic Measurement of Optic Nerve Sheath Diameter in Normal Adults

Oluseyi¹,

Ukamaka²

2017

AIMDR

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Background: Raised intracranial pressure (ICP) is a common manifestation of severe brain injury and measurement of optic nerve diameter using ultrasound as a non-invasive method is increasing being use as a marker to detect raised ICP. The aim of this study is to determine normal optic nerve sheath diameter in normal Nigerian adults. Methods: This was a cross-sectional prospective study conducted at the radiology department on 150 normal adults over a period of ten months. The optic nerve sheath diameter (ONSD) was measured 3mm behind the globe using 7.5 MHz linear probe placed over the closed eyelid with subjects in supine position. Results: The mean age of the studied population was 38.69±12.

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“…The intent, most often, is to maximize resolution and minimize the contribution of observer variability. Yet, physicians sometimes interpret images differently, including images generated from US studies in adults [1][2][3][4] and newborns [5][6][7][8][9]. This has obvious clinical as well as research implications [10], and may affect the value of studies that seek to identify the correlates and antecedents of US scan images.…”

Section: Introductionmentioning

confidence: 99%