Detection of placenta elasticity modulus by quantitative real-time shear wave imaging

Area of Science:

• Obstetrics and Gynecology
• Medical Imaging
• Biophysics

Background:

• Placental function is crucial for fetal development.
• Assessing placental health non-invasively is clinically important.
• Shear wave elastography (SWE) offers a novel method for tissue characterization.

Purpose of the Study:

• To evaluate the clinical utility of real-time quantitative shear wave elastography for detecting placental elastic modulus.
• To compare the elastic modulus between the central and peripheral regions of the placenta in normal pregnancies.
• To investigate potential correlations between placental elastic modulus and Doppler indices of maternal and fetal circulation.

Main Methods:

• Utilized a real-time shear wave ultrasonic diagnostic apparatus to measure placental elastic modulus in 30 women with normal, late-stage pregnancies.
• Randomly selected regions of interest in the placental center and edge, obtaining 15 measurements per region for each case.
• Measured pulsatility index (PI) values of the umbilical and uterine arteries in 18 cases.

Main Results:

• The average elastic modulus was similar between the placental center (7.84 +/- 1.68 kPa) and edge (7.60 +/- 1.71 kPa) (p > 0.05).
• No significant linear correlation was found between placental elastic modulus and umbilical or uterine artery PI values.
• Significant variations in elastic modulus were observed within the placenta.

Conclusions:

• Placental elastic modulus shows no significant difference between central and edge regions in normal pregnancies.
• Real-time SWE can be used to obtain placental elastic modulus, potentially serving as a new clinical assessment tool for placental function.
• The study found no correlation between placental elastic modulus and Doppler PI values, suggesting independent physiological regulation.