Abstract
Introduction: The primary aim of this investigation was to determine whether use of write-zoom magnification affects sonographically determined cross-sectional area (CSA) of peripheral nerves. Methods: CSAs of the median (MN) and posterior interosseous (PIN) nerves were measured in 22 limbs from 11 asymptomatic volunteers using both standard imaging and write-zoom magnification. CSA measurements were repeated on the same images 1 week later. Results: The average CSA of write-zoomed images for the MN was significantly larger at both measurement sessions (week 1: 11.1 mm2 write-zoom vs. 10.0 mm2 standard, P=0.019; week 2: 11.8 mm2 vs. 10.4 mm2, P=0.023). Similar differences were noted for the PIN (week 1: 2.3 mm2 vs. 1.9 mm2, P=0.002; week 2: 2.5 mm2 vs. 1.9 mm2, P=0.001). Conclusions: Write-zoom magnification may significantly increase the measured CSA of peripheral nerves. These changes appear to be more substantial when smaller nerves are measured.
Original language | English (US) |
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Pages (from-to) | 30-34 |
Number of pages | 5 |
Journal | Muscle and Nerve |
Volume | 51 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2015 |
Keywords
- Carpal tunnel syndrome
- Cross-sectional area
- Peripheral nerve
- Posterior interosseous nerve ultrasound
ASJC Scopus subject areas
- Physiology
- Clinical Neurology
- Cellular and Molecular Neuroscience
- Physiology (medical)