title: Three-dimensional volumetric gray-scale uterine cervix histogram prediction of days to delivery in full term pregnancy.
abstract: OBJECTIVE
  Our aim was to figure out whether volumetric gray-scale histogram difference between anterior and posterior cervix can indicate the extent of cervical consistency.
  
  
  METHODS
  We collected data of 95 patients who were appropriate for vaginal delivery with 36th to 37th weeks of gestational age from September 2010 to October 2011 in the Department of Obstetrics and Gynecology, Korea University Ansan Hospital. Patients were excluded who had one of the followings: Cesarean section, labor induction, premature rupture of membrane. Thirty-four patients were finally enrolled. The patients underwent evaluation of the cervix through Bishop score, cervical length, cervical volume, three-dimensional (3D) cervical volumetric gray-scale histogram. The interval days from the cervix evaluation to the delivery day were counted. We compared to 3D cervical volumetric gray-scale histogram, Bishop score, cervical length, cervical volume with interval days from the evaluation of the cervix to the delivery.
  
  
  RESULTS
  Gray-scale histogram difference between anterior and posterior cervix was significantly correlated to days to delivery. Its correlation coefficient (R) was 0.500 (P = 0.003). The cervical length was significantly related to the days to delivery. The correlation coefficient (R) and P-value between them were 0.421 and 0.013. However, anterior lip histogram, posterior lip histogram, total cervical volume, Bishop score were not associated with days to delivery (P >0.05).
  
  
  CONCLUSIONS
  By using gray-scale histogram difference between anterior and posterior cervix and cervical length correlated with the days to delivery. These methods can be utilized to better help predict a cervical consistency.
authors: Department of Obstetrics and Gynecology, Korea University College of Medicine, Korea.
authors: Ji Youn
authors: JY
authors: Kim
authors: Hai-Joong
authors: HJ
authors: Kim
authors: Meong Hi
authors: MH
authors: Hahn
authors: Hye Jin
authors: HJ
authors: Jeon
authors: Geum Joon
authors: GJ
authors: Cho
authors: Sun Chul
authors: SC
authors: Hong
authors: Min Jeong
authors: MJ
authors: Oh
keywords: Prediction of delivery day; Three-dimensional ultrasoundgraphy; Three-dimensional volumetric gray-scale histogram