Ultrasonographic Optic Nerve Sheath Diameter Technical Pitfalls and Imaging Artifacts
Copyright policy )Ultrasonographic Optic Nerve Sheath Diameter Technical Pitfalls and Imaging Artifacts
Ultrasonographic optic nerve sheath diameter (ONSD) is a non‐invasive intracranial pressure (ICP) surrogate. This article discusses the effect of ultrasound settings and imaging artifacts on ONSD assessment. Ultrasound settings that may affect ONSD assessment include gain, dynamic range, frequency, harmonic imaging, and focal zones. Artifacts can be related to imaged structures (acoustic shadowing, enhancement, comet tail, and speckle artifacts) or to beam properties (partial volume and refraction artifacts). In addition, optic nerve sheath (ONS) properties such as echogenicity changes based on ICP or ONS kinking are discussed.
- Karolinska Institute Sweden
- Baylor College of Medicine United States
- Karolinska University Hospital Sweden
- Universität Augsburg Germany
- University of South Carolina United States
Intracranial Pressure, Humans, Optic Nerve, Artifacts, Ultrasonography
Intracranial Pressure, Humans, Optic Nerve, Artifacts, Ultrasonography
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