Method for fetal head orientation measurement based on electromagnetic positioning and ultrasonic imaging

Abstract

The invention discloses a method for fetal head orientation measurement based on electromagnetic positioning and ultrasonic imaging. The method comprises four measurement modes for fetus orbits, fetus cervical vertebra, fetus brain middle line and fetus biparietal diameter. The method comprises the steps that (1) an electromagnetic positioning system is used to measure coordinates of symphysis pubis upper-lower edges and a fifth lumbar vertebra spinous process of a pregnant woman; (2) a normal vector of a sagittal face is computed; (3) an integrated probe is used for transverse scanning of the pregnant woman's abdominal cavity, an ultrasonic image of anatomy characteristic points of the fetal head is acquired, and the measurement mode is determined on the basis; (4) direction vectors under different measurement modes are computed; (5) included angles between the direction vectors and the sagittal face normal vector are computed; and (6) the fetal head orientation is determined according to the included angles. The method disclosed by the invention has the advantages that the fetal head orientation can be measured conveniently, rapidly and accurately, etc.

Description

technical field [0001] The invention belongs to the fusion field of medical ultrasonic imaging and electromagnetic positioning technology, in particular to a fetal head orientation measurement method based on electromagnetic positioning and ultrasonic imaging. Background technique [0002] The fetal presentation is the first part of the fetus entering the pelvis, and the position of the fetal head refers to the positional relationship between the fetal presentation and the mother's pelvis. Even if the fetal head is exposed, it can be divided into eight different fetal head positions according to the different lying positions of the fetus, such as the occiput anterior position, occiput transverse position, and occiput posterior position. Abnormal fetal pattern and fetal position can lead to dystocia, so checking the direction of the fetal head correctly and quickly plays an extremely important role in correcting the fetal position in time and promoting normal delivery. [00...

AI Technical Summary

Problems solved by technology

Affected by the position of the fetal head, the outer ear of the fetus cannot be scanned in all cases, which leads to a higher accuracy rate in the position of the fetal head in front of the occiput and behind the occiput, but a lower rate of accuracy in the other positions of the fetal head

Can not meet the clinical needs very well

Images