A novel method for evaluating uterine cervical consistency using vaginal ultrasound gray-level histogram.

Abstract:

AIMS:To evaluate uterine cervical consistency using a vaginal ultrasound gray-level histogram. METHODS:Vaginal ultrasound and digital examination were performed for 214 women with low-risk singleton pregnancy during 27-30(th) pregnancy week. The mean gray-level (MGL) of an ultrasound gray-level histogram, representing the echogenicity of a region of interest, was measured in the midsection of anterior and posterior cervical walls. The difference in MGL between anterior and posterior (AP difference) was related to the Bishop sub-score for cervical consistency (0, 1, or 2), determined before ultrasound. RESULTS:A larger positive AP difference indicated significantly lower Bishop sub-score. After analyzing the receiver operator characteristic curves for the AP difference, a value of 1.42 and -1.98 was the best cut-off value to determine a hard cervix (score 0) and a soft cervix (score 2), respectively. To identify a hard cervix, this test had 71% sensitivity and 82% specificity. For a soft cervix, it was 66% and 87%, respectively. CONCLUSIONS:A more echogenic anterior than posterior cervix indicates a hard cervix; the greater the difference in echogenicity between anterior and posterior walls the harder the cervix. The difference in MGL of the ultrasound gray-level histogram may enable objective evaluation of cervical consistency.

journal_name

J Perinat Med

authors

Kuwata T,Matsubara S,Taniguchi N,Ohkuchi A,Ohkusa T,Suzuki M

doi

10.1515/jpm.2010.079

subject

Has Abstract

pub_date

2010-09-01 00:00:00

pages

491-4

issue

5

eissn

0300-5577

issn

1619-3997

journal_volume

38

pub_type

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