Fetal and placental volumetric and functional analysis using echo-planar imaging

Area of Science:

• Medical Imaging
• Radiology
• Fetal Development

Background:

• Echo-planar imaging (EPI) provides advantages over conventional radiological methods like ultrasound for obtaining anatomical and physiological information during pregnancy.
• EPI is a rapid and convenient technique for measuring organ volumes and relaxation times in fetal structures.

Purpose of the Study:

• To explore the utility of EPI in assessing fetal development and physiological parameters during pregnancy.
• To investigate the potential of EPI for developing an "index of maturity" for fetal lung maturation.
• To evaluate the application of EPI in assessing placental function and fetal brain perfusion.

Main Methods:

• Utilized echo-planar imaging (EPI) for volumetric measurements of fetal organs throughout gestation.
• Performed relaxation time measurements (T1 and T2) in the placenta and fetal lungs.
• Applied EPI techniques to assess placental perfusion, uterine artery flow, and fetal brain perfusion.

Main Results:

• Volumetric estimates from EPI correlated well with known fetal weight across gestations.
• T1 and T2 parameters in the placenta showed a decrease with advancing gestational age and in cases of abnormal placentation.
• EPI demonstrated capability in assessing placental perfusion, uterine artery flow, and fetal brain perfusion.

Conclusions:

• EPI is a valuable tool for obtaining crucial anatomical and physiological data in pregnant patients, surpassing conventional methods.
• Combining volumetric and relaxation time measurements with gestational age may enable the development of an "index of maturity" for fetal lung maturation.
• EPI facilitates comprehensive assessment of placental function and fetal neurovascular status, offering significant clinical potential.