Image detection method and system for prolonging second birth process of double-fetal vaginal delivery and SPPH risk based on ultrasonic Speckle-tracing

By constructing the displacement field and nonlinear strain trajectory of the cervical-vaginal junction region using ultrasound speckle-tracking technology, the problem of difficulty in identifying the evolution of the cervical-vaginal junction region from reversible stretching to irreversible instability in existing technologies has been solved, enabling early and accurate assessment of SPPH risk.

CN121883442AActive Publication Date: 2026-04-17PEKING UNIVERSITY THIRD HOSPITAL (THE THIRD CLINICAL MEDICAL SCHOOL OF PEKING UNIVERSITY)
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Patent Information

Application Number
CN202610005087.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-05
Publication Date
2026-04-17
Estimated Expiration
2046-01-05

AI Technical Summary

Technical Problem

Existing technologies make it difficult to quantitatively analyze the biomechanical behavior of the cervical and vaginal junction in twin vaginal deliveries, especially in the second stage of labor, where it is difficult to identify the evolution of tissue from reversible stretching to irreversible instability, leading to inaccurate risk assessment of severe postpartum hemorrhage (SPPH).

Method used

Using ultrasound speckle-tracking technology, a joint regional displacement field of the cervix and anterior and posterior vaginal walls was constructed through multi-layer semantic mask generation, multi-scale pyramid and singular value decomposition texture sub-block matching. Logarithmic strain modeling and strain trajectory accumulation were performed, and a SPPH risk scoring function was constructed by combining fuzzy rule reasoning.

Benefits of technology

This study enables quantitative analysis of the biomechanical behavior of the combined cervical and vaginal region, allowing for early identification of high-risk conditions. This improves the prospective and sensitive nature of SPPH risk assessment, reduces reliance on subjective experience, and enhances the stability and reproducibility of assessment results.

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Abstract

The invention relates to the technical field of ultrasonic image analysis, and discloses an image detection method and system for prolonging the second birth process of double-fetal vaginal delivery and SPPH risk based on ultrasonic Speckle-tracing, and the method comprises the steps: obtaining an ultrasonic two-dimensional gray-scale image sequence; marking a conjoint analysis area between the cervical wall and the front and rear walls of the vagina; constructing a joint area displacement field; constructing a joint region strain trajectory; extracting parturition process characteristic indexes; and executing risk assessment through a fuzzy rule. The technical problem that in the prior art, risk judgment depends on clinical experience, and especially under the condition that continuous stretching occurs on the cervix uteri and vagina combined wall in the second birth process of double-fetal vaginal delivery, early recognition of the evolution process of the tissue from reversible stretching to irreversible instability is difficult to achieve is solved. Due to the fact that joint area displacement field modeling and logarithmic nonlinear strain analysis are introduced, quantitative characterization and continuous risk description of the mechanical behavior of the tissue in the labor process are achieved.
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