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The effect of magnification on sonographically measured nerve cross‐sectional area
Author(s) -
Jelsing Elena J.,
Presley James C.,
Maida Eugene,
Hangiandreou Nicholas J.,
Smith Jay
Publication year - 2015
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24274
Subject(s) - magnification , medicine , asymptomatic , nuclear medicine , anatomy , peripheral , zoom , surgery , computer science , petroleum engineering , engineering , computer vision , lens (geology)
: 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 mm 2 write‐zoom vs. 10.0 mm 2 standard, P = 0.019; week 2: 11.8 mm 2 vs. 10.4 mm 2 , P = 0.023). Similar differences were noted for the PIN (week 1: 2.3 mm 2 vs. 1.9 mm 2 , P = 0.002; week 2: 2.5 mm 2 vs. 1.9 mm 2 , 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. Muscle Nerve 51 : 30–34, 2015