scholarly journals OP23.06: Intrapartum assessment of fetal head descent: A feasibility study using three dimensional transperineal ultrasound

2008 ◽  
Vol 32 (3) ◽  
pp. 390-391
Author(s):  
C. E. Macpherson ◽  
F. Lovegrove ◽  
S. Harris ◽  
K. D. Kalache ◽  
G. Michailidis
Keyword(s):  
Feasibility Study ◽  
Three Dimensional ◽  
Transperineal Ultrasound ◽  
Fetal Head

scholarly journals OP04.07: Three‐dimensional transperineal ultrasound render of fetal head in the second stage of labour: a pilot study

2019 ◽  
Vol 54 (S1) ◽  
pp. 97-97
Author(s):  
A. Youssef ◽  
M. Dodaro ◽  
G. Di Donna ◽  
L. Bianchini ◽  
F. Bellussi ◽  
...  
Keyword(s):  
Pilot Study ◽  
Three Dimensional ◽  
Transperineal Ultrasound ◽  
Fetal Head ◽  
Second Stage ◽  
Second Stage Of Labour

scholarly journals Agreement between two- and three-dimensional transperineal ultrasound methods for assessment of fetal head-symphysis distance in active labor

2014 ◽  
Vol 43 (2) ◽  
pp. 183-188 ◽  
Author(s):  
A. Youssef ◽  
F. Bellussi ◽  
E. Montaguti ◽  
E. Maroni ◽  
G. Salsi ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Transperineal Ultrasound ◽  
Fetal Head ◽  
Active Labor

scholarly journals Prediction of vaginal delivery with transperineal ultrasound in women induced with dinoprostone beyond 40 weeks of gestation

2018 ◽  
Vol 7 (8) ◽  
pp. 2998
Author(s):  
Hale Göksever Çelik ◽  
Engin Çelik ◽  
Gökhan Yıldırım
Keyword(s):  
Pregnant Women ◽  
Vaginal Delivery ◽  
Prospective Observational Study ◽  
Transperineal Ultrasound ◽  
Direct Visualization ◽  
Fetal Head ◽  
Nulliparous Women ◽  
Multiparous Women ◽  
High Possibility ◽  
Angle Of Progression

Background: Digital cervical evaluation has been used to determine the likelihood of vaginal delivery which is considered by many women to be non-tolerable. Recently, transperineal ultrasound allowing direct visualization of the fetal skull has been using for the prediction of labor route. Authors aimed to study whether measurements on transperineal ultrasound are predictive for vaginal delivery in pregnant women induced with dinoprostone at 40.0-42.0 gestational weeks.Methods: A total of 55 pregnant women at 40.0-42.0 gestational weeks were enrolled in this prospective observational study. All participated women were examined before the induction with dinoprostone to measure the head-perineum distance (HPD), the head-pubis distance and the angle of progression of fetal head (AOP).Results: The greater AOP, the shorter HPD and the head-pubis distance were associated with vaginal delivery in the nulliparous women. The HPD and the head-pubis distance were shorter, whereas the AOP was greater in the multiparous women giving birth by vaginal route.Conclusions: Transperineal ultrasound can be applied at the beginning of labor to predict whether vaginal delivery will occur or not. As shown in our study, the pregnant women with shorter HPD and wider AOP might have a high possibility to achieve vaginal delivery.

scholarly journals The Assessment of Intrapartum Transperineal Ultrasonographic Parameters for their Effectiveness in Evaluation of Progress of Labor and Prediction of Mode of Delivery in Egyptian Women

2021 ◽  
Vol 9 (B) ◽  
pp. 1037-1043
Author(s):  
Gamal Abdelsameea Ibrahim ◽  
Ahmed Soliman Nasr ◽  
Fatma Atta ◽  
Mohamed Reda ◽  
Hend Abdelghany ◽  
...  
Keyword(s):  
Vaginal Delivery ◽  
Ultrasound Examination ◽  
Mode Of Delivery ◽  
Transperineal Ultrasound ◽  
Ultrasound Measurement ◽  
Vaginal Examination ◽  
Fetal Head ◽  
Prolonged Labor ◽  
Digital Vaginal Examination ◽  
Angle Of Progression

Introduction: High fetal head station has been associated with prolonged labor and delivery outcomes. Although clinical assessment of fetal head station is both subjective and unreliable, women with prolonged labor are subjected to multiple digital vaginal examinations. The use of ultrasound has been proposed to aid in the management of labor since 1990s. Ultrasound examination is more accurate and reproducible than clinical examination in the diagnosis of fetal head station and in the prediction of arrest of labor. Ultrasound examination can, to some extent, distinguish those women destined for spontaneous vaginal delivery and those destined for operative delivery and  may predict the outcome of instrumental vaginal delivery. Such a technique has the potential to reduce the frequency of intrusive internal examinations and associated infection and could be useful in allowing the assessment of women in whom digital VE is traumatic or contra-indicated. Intrapartum ultrasound not only provides objective and quantitative data in labor, but also helps to make more reliable clinical decisions aiming to improve obstetric outcomes of both the mother and fetus as a supplementary tool for active management. Aim of the work: This study aims at assessing the value of intrapartum transperineal ultrasonography as a quantitative and objective tool in the evaluation of progress of labor and prediction of mode of delivery. Subjects: This study was a prospective observational study conducted on 600 primiparous women in active first stage of labor admitted to Kasr Al Ainy maternity hospital from January 2017 to June 2018. The studied population was divided into two groups. Group A of 300 women with normal progress of labor and group B of 300 women with prolonged 1st stage of labor. Methods: Fetal head station(FHS) was assessed clinically by digital vaginal examination (dVE) and sonographically by transperineal ultrasound measurement of  head perineal distance (HPD) and angle of progression (AOP). Intrapartum care of the patient continued as normal based only on digital vaginal examinations using the modified WHO partogram. (1). Statistical analysis was targeted towards assessing the potential of the intrapartum ultrasonography in the evaluation of progress of labor and prediction of mode of delivery. Results: All studied parameters for assessment of FHS (dVE, HPD, and AOP) significantly corelated with each other and with both progress of labor and mode of delivery with P value (<0.001). The highest sensitivity for prediction of progress of labor is observed using dVE (83%), the highest specificity is observed using AOP (78.3%). The highest sensitivity for prediction mode of delivery is for combined HPD & AOP (97.7%) while the highest specificity is for AOP (81%). When combining both HPD and AOP for prediction of mode of delivery, the assessment of both parameters was found to have a high sensitivity of 97.7% and a high positive predictive value of 86.63%. Conclusion: Intrapartum ultrasound examination is a valuable tool in the prediction of progress of labor and mode of delivery. The assessment of fetal head station by transperineal ultrasound measurement of HPD and AOP is much more informative of the progress of labor and the mode of delivery than digital assessment of fetal head station. Keywords: Labor, intrapartum ultrasound, Angle of progression, Head perineal distance, fetal head station, digital vaginal examination.

scholarly journals Feasibility Study of Textureless Object Detection and Pose Estimation Based on a Model with 3D Edgels and Surfaces

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Kimitoshi Yamazaki ◽  
Kiyohiro Sogen ◽  
Takashi Yamamoto ◽  
Masayuki Inaba
Keyword(s):  
Object Detection ◽  
Feasibility Study ◽  
Pose Estimation ◽  
Template Matching ◽  
Input Data ◽  
Three Dimensional ◽  
Target Object ◽  
Textural Features ◽  
Two Dimensional ◽  
Home Appliances

Abstract This paper describes a method for the detection of textureless objects. Our target objects include furniture and home appliances, which have no rich textural features or characteristic shapes. Focusing on the ease of application, we define a model that represents objects in terms of three-dimensional edgels and surfaces. Object detection is performed by superimposing input data on the model. A two-stage algorithm is applied to bring out object poses. Surfaces are used to extract candidates fromthe input data, and edgels are then used to identify the pose of a target object using two-dimensional template matching. Experiments using four real furniture and home appliances were performed to show the feasibility of the proposed method.We suggest the possible applicability in occlusion and clutter conditions.

scholarly journals Finite-Element Simulation of the Barnes Ice Cap

1979 ◽  
Vol 24 (90) ◽  
pp. 489-490 ◽  
Author(s):  
J. J. Emery ◽  
E. A. Hanafy ◽  
G. H. Holdsworth ◽  
F. Mirza
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Simulation Model ◽  
Feasibility Study ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Ice Cap ◽  
Stress Dependent ◽  
Analytical Approaches ◽  
Element Method

Abstract The finite-element method is being used to simulate glacier flow problems, with particular emphasis on the surge behaviour of the Barnes Ice Cap, Baffin Island. Following an advanced feasibility study to determine the influence of major factors such as bed topography and flow relationships, a refined simulation model is being developed to incorporate realistically: the thermal regime of the ice mass; large deformations during flow and sliding; basal sliding zones; a temperature and stress dependent ice flow relationship; mass balance; and three-dimensional influences. The findings of the advanced feasibility study on isothermal, steady-state flow of the Barnes Ice Cap are presented in the paper before turning to a detailed discussion of the refined simulation model and its application to surging. It is clear that the finite-element method allows necessary refinements not available to analytical approaches.

scholarly journals Three-Dimensional Ultrasound Guidance of Autonomous Robotic Breast Biopsy: Feasibility Study

2010 ◽  
Vol 36 (1) ◽  
pp. 173-177 ◽  
Author(s):  
Kaicheng Liang ◽  
Albert J. Rogers ◽  
Edward D. Light ◽  
Daniel von Allmen ◽  
Stephen W. Smith
Keyword(s):  
Feasibility Study ◽  
Ultrasound Guidance ◽  
Breast Biopsy ◽  
Three Dimensional
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