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The effect of image size on nuchal translucency measurement
Author(s) -
Edwards Andrew,
Mulvey Sheila,
Wallace Euan M.
Publication year - 2003
Publication title -
prenatal diagnosis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.956
H-Index - 97
eISSN - 1097-0223
pISSN - 0197-3851
DOI - 10.1002/pd.577
Subject(s) - magnification , nuchal translucency , medicine , nuclear medicine , singleton , pregnancy , physics , optics , gestation , first trimester , biology , genetics
Objectives To assess the effect of altering image size on the absolute nuchal translucency (NT) measurement. Methods NT was measured at three image magnifications (60%, 100% and 200%) in 120 singleton pregnancies. Results The mean ± SD NT measurements were 1.52 ± 0.57 mm, 1.35 ± 0.53 mm and 1.18 ± 0.48 mm at 60%, 100% and 200% magnification, respectively ( p = 0.00001). Conclusions The measurement of NT decreases significantly with increasing image size. Optimisation of NT as a method of screening will require agreed standardisation of image magnification. Copyright © 2003 John Wiley & Sons, Ltd.