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Optic Nerve Sheath Diameter Measured by Point-of-Care Ultrasound and MRI.
J Neuroimaging. 2020 11; 30(6):793-799.JN

Abstract

BACKGROUND AND PURPOSE

Ultrasound (US) measurement of the optic nerve sheath diameter (ONSD) and optic nerve diameter (OND) is a method frequently used to screen for an increased intracranial pressure. The aim of this study was to assess the accuracy of US measurements of ONSD and OND, when compared to magnetic resonance imaging (MRI) measurements as the criterion standard.

METHODS

In this prospective, single-institution study, orbital US was performed for those patients requiring an emergent brain MRI. ONSD and OND of both eyes were measured in the axial and coronal planes in straight gaze by US. ONSD and OND from brain and orbital MRI were measured by two neuroradiologists. Correlation and agreement between readings were assessed using Pearson's correlations.

RESULTS

Eighty-two patients met inclusion criteria. The mean axial and coronal ONSD in the MRI examinations was 5.6 and 5.7 mm at 3-5.9 mm behind the globe, respectively. The mean ONSD from the US measurements was 6.22 and 5.52 mm in the axial and coronal planes, respectively. The mean OND in US examinations was 4.31 mm (axial) and 3.68 mm (coronal). Axial versus coronal measurements of ONSD had a modest correlation in US assessment with an r2 of .385 (P < .001) but there were no correlations between any of the US and MRI measurements.

CONCLUSIONS

In measuring ONSD and OND, US measurements showed a modest correlation between axial and coronal measurements, but no concordance was found between US and MRI in our setting.

Authors+Show Affiliations

Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA.Department of Emergency Medicine, The George Washington University Medical Center, Washington, DC.Department of Emergency Medicine, The George Washington University Medical Center, Washington, DC.Harvard Affiliated Emergency Medicine Residency Program, Harvard Medical School, Boston, MA.Department of Radiology, The George Washington University Medical Center, Washington, DC.Department of Emergency Medicine, The George Washington University Medical Center, Washington, DC.Department of Emergency Medicine, The George Washington University Medical Center, Washington, DC.Department of Radiology, The George Washington University Medical Center, Washington, DC.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32896994

Citation

Shokoohi, Hamid, et al. "Optic Nerve Sheath Diameter Measured By Point-of-Care Ultrasound and MRI." Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging, vol. 30, no. 6, 2020, pp. 793-799.
Shokoohi H, Pyle M, Kuhl E, et al. Optic Nerve Sheath Diameter Measured by Point-of-Care Ultrasound and MRI. J Neuroimaging. 2020;30(6):793-799.
Shokoohi, H., Pyle, M., Kuhl, E., Loesche, M. A., Goyal, A., LeSaux, M. A., Boniface, K. S., & Taheri, M. R. (2020). Optic Nerve Sheath Diameter Measured by Point-of-Care Ultrasound and MRI. Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging, 30(6), 793-799. https://doi.org/10.1111/jon.12764
Shokoohi H, et al. Optic Nerve Sheath Diameter Measured By Point-of-Care Ultrasound and MRI. J Neuroimaging. 2020;30(6):793-799. PubMed PMID: 32896994.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Optic Nerve Sheath Diameter Measured by Point-of-Care Ultrasound and MRI. AU - Shokoohi,Hamid, AU - Pyle,Matthew, AU - Kuhl,Evan, AU - Loesche,Michael A, AU - Goyal,Aakshit, AU - LeSaux,Maxine A, AU - Boniface,Keith S, AU - Taheri,M Reza, Y1 - 2020/09/08/ PY - 2020/02/23/received PY - 2020/07/17/accepted PY - 2020/9/9/pubmed PY - 2020/9/9/medline PY - 2020/9/8/entrez KW - Increased ICP KW - MRI KW - optic nerve sheath KW - point-of-care ultrasound SP - 793 EP - 799 JF - Journal of neuroimaging : official journal of the American Society of Neuroimaging JO - J Neuroimaging VL - 30 IS - 6 N2 - BACKGROUND AND PURPOSE: Ultrasound (US) measurement of the optic nerve sheath diameter (ONSD) and optic nerve diameter (OND) is a method frequently used to screen for an increased intracranial pressure. The aim of this study was to assess the accuracy of US measurements of ONSD and OND, when compared to magnetic resonance imaging (MRI) measurements as the criterion standard. METHODS: In this prospective, single-institution study, orbital US was performed for those patients requiring an emergent brain MRI. ONSD and OND of both eyes were measured in the axial and coronal planes in straight gaze by US. ONSD and OND from brain and orbital MRI were measured by two neuroradiologists. Correlation and agreement between readings were assessed using Pearson's correlations. RESULTS: Eighty-two patients met inclusion criteria. The mean axial and coronal ONSD in the MRI examinations was 5.6 and 5.7 mm at 3-5.9 mm behind the globe, respectively. The mean ONSD from the US measurements was 6.22 and 5.52 mm in the axial and coronal planes, respectively. The mean OND in US examinations was 4.31 mm (axial) and 3.68 mm (coronal). Axial versus coronal measurements of ONSD had a modest correlation in US assessment with an r2 of .385 (P < .001) but there were no correlations between any of the US and MRI measurements. CONCLUSIONS: In measuring ONSD and OND, US measurements showed a modest correlation between axial and coronal measurements, but no concordance was found between US and MRI in our setting. SN - 1552-6569 UR - https://www.unboundmedicine.com/medline/citation/32896994/Optic_Nerve_Sheath_Diameter_Measured_by_Point_of_Care_Ultrasound_and_MRI_ L2 - https://doi.org/10.1111/jon.12764 DB - PRIME DP - Unbound Medicine ER -