Electronic spatiotemporal image correlation improves four-dimensional fetal echocardiography.

Area of Science:

• Medical Imaging
• Fetal Ultrasound
• Cardiology

Background:

• Four-dimensional (4D) fetal echocardiography is crucial for diagnosing congenital heart defects.
• Conventional spatiotemporal image correlation (STIC) has limitations in acquiring high-quality 4D fetal cardiac volumes.
• Advancements in ultrasound technology are needed to enhance fetal cardiac imaging.

Purpose of the Study:

• To compare the diagnostic quality of 4D fetal cardiac volumes acquired using electronic STIC (eSTIC) versus conventional STIC.
• To evaluate the efficiency of eSTIC in obtaining diagnostically adequate fetal cardiac datasets within standard examination times.

Main Methods:

• A randomized controlled trial involving 100 mid-gestation fetuses with normal sonograms.
• Fetal cardiac volumes were acquired using either a conventional mechanical 4D probe (STIC) or an electronic 4D probe (eSTIC).
• Acquired datasets were assessed for diagnostic quality (optimal, satisfactory, inadequate) based on the ability to perform an extended basic cardiac examination.

Main Results:

• eSTIC achieved significantly higher rates of optimal or satisfactory diagnostic quality (94%) compared to conventional STIC (76%) (P < 0.0001).
• Inadequate eSTIC volumes were solely due to unfavorable fetal positioning.
• The eSTIC method allowed for detailed offline evaluation of fetal heart anatomy.

Conclusions:

• The electronic 4D probe (eSTIC) facilitates superior acquisition of sonographic cardiac volumes in mid-trimester fetuses.
• eSTIC enables obtaining optimal or satisfactory quality volumes in over 90% of cases within standard examination timeframes.
• eSTIC represents an advancement for detailed offline fetal cardiac assessment.